<< THIS IS TO BE THE 2372B.TXT MANUAL  8-16-89 >>

ACB-2372B
PC AT-TO-ST412/506
2,7 RLL HARD DISK
AND FLOPPY CONTROLLER

USER'S MANUAL


SECTION                                                        Page

1.0 INTRODUCTION                                                1-1
1.1 Quick Installation                                          1-1
1.2 Scope and Purpose of Manual                                 1-2
1.3 Reference Documents                                         1-2
1.4 Overview of Product                                         1-2
1.5 Hardware and Software Requirements                          1-6

2.0 HARDWARE INSTALLATION                                       2-1
2.1 Introduction                                                2-1
2.2 Environmental Requirements                                  2-1
2.3 Unpacking Procedure                                         2-2
2.4 ACB-2372B Board Layout                                      2-3
2.5 ACB-2370B Board Layout                                      2-4
2.6 System Requirements                                         2-5
2.7 Integration Into the System                                 2-7

3.0 SOFTWARE INSTALLATION                                       3-1
3.1 Introduction                                                3-1
3.3 Format Procedure for Hard Disk Drives                       3-3
3.4 Special Options                                             3-8

4.0 TROUBLESHOOTING                                             4-1
4.1 Introduction                                                4-1
4.2 Adaptec ACB-2327B Troubleshooting Checklist                 4-1
4.3 Controller Error Codes                                      4-4
4.4 BIOS Error Codes                                            4-7

5.0 APPENDICES                                                  5-1
I   Installing SCO Xenix                                        5-1
II  Installing ISC Unix                                         5-2
III Installing OS/2                                             5-3
IV  Using 17-Sector Emulation                                   5-5
V   Installing Novell                                           5-7
VI  Driver and Operating System Support                        5-10


LIST OF TABLES
Table                                                          Page

2-1 ACB-2327B System Memory Map                                 2-5
2-2 ACB-2372B Controller Power Requirements                     2-6
2-3 ACB-2372B Controller Connector Definitions                 2-13
2-4 ACB-2370B Controller Connector Definitions                 2-14
4-1 Class 00 Error Codes (Drive Errors)                         4-4
4-2 Class 01 Error Codes (Data Recover Errors)                  4-5
4-3 Class 02 error Codes (System-Related Errors)                4-6
4-4 Class 03 Error Codes (Diagnostics Errors)                   4-6
4-5 Class 04 Error Codes (Timeouts and Misc. Errors)            4-7
4-6 BIOS Error Codes                                            4-7


LIST OF FIGURES
Figure                                                         Page

2-1 ACB-2372B Board Layout                                      2-3
2-2 ACB-2370B Board Layout                                      2-4
2-3 ACB-2322B Controller and Drive Cabling                      2-9
    (Twisted Cable)
2-4 ACB-2372B Controller and Drive Cabling                     2-10
    (Flat Cable)
2-5 ACB-2370B Controller and Drive Cabling                     2-11
    (Twisted Cable)
2-6 ACB-2370B Controller and Drive Cabling                     2-12
    (Flat Cable)



1.1 QUICK INSTALLATION

Most of us don't like to read manuals. If you are familiar with drive 
installations, you don't need to read this one. The manual describes in 
detail the process outlined below. Try this quick-install first. If you 
need more details, dig into the manual.

A. ACB-2372B - Install controller and drives into your PC AT, and cable them 
together. Run a floppy cable from "FD" to both floppy drives. The connector 
on the END of the cable goes to drive 1. Run a 34-pin hard drive cable from 
HD and connect to both hard drives. Connect one 20-pin cable each from 
"DR1" to the first hard drive, and from "DR2" to the second hard drive 
(if installed).

  ACB-2370B - Install controller and drives into your PC AT, and cable them 
together. Run a 34-pin hard drive control cable from J3 and connect it to 
both hard drives. Connect one 20-pin cable from J1 to hard drive 1, and one 
20-pin cable from J2 to hard drive 2 (if installed). Don't forget to plug 
a system power cable into the hard drive!

B. Run your PC AT "SETUP" and set the hard drive to type 1.

C. Boot to DOS, and run DEBUG.

D. Type in:  A>DEBUG <CR>
-G=C800:5    <CR>

E. The Adaptec format menu will come up.

F. Choose: 1 - to primary-format drive 1.

G. The controller will read the number of heads and cylinders from the 
drive. The manufacturer's defect list will also be read in.

H. Now just keep hitting <CR> (to take the defaults).

I. After format is complete, choose q - to end the program.

J. Now you are ready to install your operating system software. Go to DOS 
FDISK, and FORMAT, or SPEEDSTOR, DISK MANAGER, SCO XENIX, OS/2, UNIX, etc.


1.2 Scope and Purpose of Manual

The purpose of this manual is to guide the system integrator through a 
successful installation of Adaptec's ACB-2372B board. This includes both 
hardware and software installation, as well as basic troubleshooting information.


1.3 Reference Documents

IBM PC AT Guide to Operations Manual
IBM DOS Reference Manual Version 3.0 or Higher
IBM PC AT Technical Reference Manual
Appropriate Disk Drive User's Manual


1.4 Overview of Product

The Adaptec ACB-2372B is a series of high-performance 2,7 RLL Hard Disk and 
Floppy Disk Controllers for the IBM PC AT and equivalent personal computers. 
The ACB-2370B is an RLL hard disk controller.
The ACB-2372B is an RLL hard disk and floppy disk controller. 

The ACB-237XB is software and hardware compatible with the IBM PC AT hard 
disk controller interface.


The Adaptec ACB-237XB RLL Controllers have the following features:

IBM hardware compatible.  Plugs directly into AT bus compatible systems 
without modification. Register (port) compatible to the IBM AT controller, 
giving true compatibility.
IBM software compatible.  Runs software that communicates through the AT 
system BIOS or directly to the controller registers, thus, the highest  
AT compatibility  is achieved. 

Supports two 2,7 runn limited (RLL) qualified ST412/506 drives. Runs High 
Performance 7.5 MHz RLL drives from all major RLL manufacturers. 
Supports two drives that have different capacities, different access times
and different manufacturers without controller modification. Drives with up 
to 16 heads and 4096 cylinders are supported by the controller through the 
registers.  Provides both the highest capacity and highest performance.

Highest PC AT 2,7 RLL  performance. The combination of non-interleaved 
operation, low controller overhead, and 26 sectors per track give the 
ACB-237XB the highest transfer rate available today. This is from 700 
Kilobytes per second to as high as 750 kilobytes per second data transfer 
depending on system configuration, thus the highest  system performance in 
multitrack data transfers.

Non-interleaved operation.  This gives the ability to read one track of 
data in one disk revolution, the maximum rate that the drive can give data 
to the controller. This provides the fastest controller/drive  performance.

Can support more than 1024 cylinders under DOS. Breaks the INT 13 limit. 
Drives up to 528 MBytes can be supported by translating the cylinder count.

Sector-sparing. One sector per track can be reserved as a spare. If a defect 
is found during format, the track will be re-formatted using the spare. Then 
the drive will be defect free under DOS.


17 sector translation. The controller can emulate a 17 sector format for 
software such as Novell that requires that feature.

Read-ahead. Special algorithms take in data before it is requested and store 
it, ready for lightning-fast data transfers. Up to 1.3 MByte/sec recorded on 
coretest! Provides optimum performance with UNIX/XENIX.


Optional on-board Adaptec ACB-BIOS. This provides the most functionality of 
any AT controller. The copyrighted ACB-BIOS contains the low level format, 
defect management, data verification, autoconfiguration of any drive without 
changing AT system BIOS. The ACB-BIOS functions are also accessible by your 
customized redirected I/O drive configuration program.

ACB-BIOS low-level primary format. This provides the ability on the controller 
to format the drive without the need of  system diagnostics or changing the 
AT system BIOS. 

ACB-BIOS ability to read RLL drive parameters. This reads the drive 
characteristics directly from the drive, reducing the possibility of using 
the wrong number of heads, cylinders, sectors, etc.

ACB-BIOS ability to read RLL manufacturer's defect list. This reads the 
manufacturer's flagged bad areas on the disk, eliminating the need to enter 
them manually. 

ACB-BIOS ability to add grown defects, save and protect all defect lists.  
This gives the ability to run additional defect tests and add the defects 
to those the manufacturer found. Also the controller saves and protects 
both the manufacturer's and grown lists from accidental erasure, thus the 
highest data reliability.

ACB-BIOS sector -level defect mapping. This flags a sector on the disk to be 
unusable and reports to the operating system its location, giving system 
level data integrity.

ACB-BIOS data verification using worst case data patterns. This tests the 
disk with the worst possible combinations of data before valuable user data 
is placed on the disk. This provides the highest data reliability.

ACB-BIOS autoconfiguration of any RLL drive, not in AT system BIOS. This 
allows any RLL drive to be formatted and used without changing the AT system 
BIOS drive tables. This simplifies the cumbersome task of changing EPROM 
drive tables to add RLL. The controller writes the drive parameters onto the 
drive during format and reads them on power up. This is ideal for field 
upgrades since the controller does not need to be hardware configured to the 
specific drive. This achieves the highest drive flexibility possible. 

ACB-BIOS defaults and help messages. Default entries help speed the user 
through an installation. If an error occurs, help messages come up to tell 
the user what to do.

PC AT height board.  This allows use in both XT and AT height machines, 
thus giving you flexibility in choosing your  machine's enclosure. 

High component integration using Adaptec ICs. Adaptec is committed to IC 
developement in order to integrate and to reduce the price of both boards 
and ICs. Adaptec's ICs are used in all Adaptec boards and in most integrated 
drives on the market; therefore, Adaptec components are proven in reliability 
and in high volume production.   

Use of surface mount technology. Adaptec is committed to the leading edge 
of technology. Surface Mount Technology allows greater functionality in 
smaller spaces, as well as higher reliability and low power.


The ACB-2372B has these additional features:

Support of two IBM AT-type floppy disk drives.  Compatible with the most 
popular IBM floppy capacities. This includes 360 KB and 1.2 MB floppy 
capacities for 5 1/4" floppy compatibility. Also supports 3 1/2" floppies that 
use the 5 1/4" floppy drive interface.

Analog floppy data separator. This gives much higher data integrity than 
digital data separators. Thus floppy data reliability and data retrievability 
are improved over previous AT floppy controllers. 

1.5 Hardware and Software Requirements

In order to install an Adaptec ACB-237XB into an IBM PC AT-compatible
computer, the following are required:

1. IBM PC AT-compatible computer. 

Note: Compatible computers are defined to have I/O bus speeds of 6 MHz with 
one I/O wait state, 8 MHz with one I/O wait state or 10 MHz with two I/O 
wait states. I/O bus speed is not the same as CPU or memory speeds. For 
example, a 16 MHz 286 or 386 machine typically runs the I/O bus at 8 MHz 
with one I/O wait state.

2. PC or MS-DOS Version 3.0 or higher. System and supplemental program 
diskettes.  

 The ACB-2372B will also run with non-DOS operating systems and networks. 
Please refer to the appendix for operation with Interactive System Unix V/386, 
SCO Xenix, Novell NetWare, OS/2 and other operating systems.

3. A diagnostic program diskette that allows the PC AT-compatible computer's 
configuration RAM to be set up (such as the diagnostics diskette IBM supplies 
with its PC ATs.)

4. Adaptec ACB-2372B hard disk and floppy disk controller, or Adaptec 
ACB-2370B hard disk controller for systems that include a floppy controller.

5. An RLL Winchester disk drive.

6. 5 1/4" or 3 1/2" floppy disk drive.

7. 20- and 34-pin flat or twisted ribbon cables for hard disk.

8. 34 pin twisted ribbon cable for floppy disk (ACB-2372B only).


2.1 Introduction

This section describes the steps necessary to install the ACB-237XB board 
into the computer. First, the operating environment, unpacking procedure 
and board layout are described. This section also describes the integration 
of the drive and controller into the computer.

2.2 Environmental Requirements

The ACB-237XB will perform properly over the following range of conditions:

Operating                                         Storage

Temperature:                                      0 to 55 (32 to 131F)
                                                  40 to 75C (-8 to 167F)
Humidity (Noncondensing):                         0% to 95% 
                                                  10% to 95%
Altitude (Feet):                                  Sea level to 10,000
                                                  Sea level to 20,000
MTBF (Hours):                                     20,000 at 55C



2.3 Unpacking Procedure

The carrier is responsible for damage incurred during shipment. In case of 
damage, have the carrier note the damage on both the delivery receipt and the 
freight bill, then notify your freight company representative so that the 
necessary insurance claims can be initiated.

After opening the shipping container, use the packing slip to verify receipt 
of the individual items listed on the slip. Retain the shipping container 
and packing material for possible later reuse should return of the equipment 
to the factory or distributor be necessary.

CAUTION: The ACB-237XB like all electronic equipment, is static sensitive. 
Please take the proper precautions when handling the board. Keep the board in 
its conductive wrapping until it is ready to be configured and installed in 
your system.

2.4 ACB-2372B Board Layout

The ACB-2372B is shown in Figure 2-1. This figure shows the location of the 
controller microcode, ACB-BIOS, jumpers and connectors. Note that Pin 1 of 
the connectors is identified by a square solder pad on the solder side of the 
board. The dimensions of the board are:

Width:  3.9 Inches
Length: 13.0 Inches
Height: 0.75 Inches



ACB-2370B board layout
The ACB-2370B is shown in Figure 2-2.   This figure shows the location of the
controller microcode, ACB-BIOS, jumpers and connectors.  Note that Pin 1 of
the connectors is identified by a square solder pad on the solder side of the
board. The dimensions of the board are:

Width:  3.9 Inches
Length: 8.0 Inches
Height: 0.75 Inches



FIGURE 2-2.  BOARD LAYOUT

2.6 System Requirements

The ACB-237XB was designed to be installed in an IBM PC AT-compatible personal 
computer; thus, it requires the same system resources as the IBM AT hard 
disk controller.

TABLE 2-1.  ACB-237XB SYSTEM MEMORY MAP

I/O Ports 

Hard Disk  - Primary 1F0,1F1,1F2,1F3,1F4,1F5,1F6,1F7,3F6,3F7
             Secondary 170,171,172,173,174,175,176,177,376,377

Floppy       - Primary 3F0,2F1,3F2,3F3,3F4,3FF5
Disk         - Secondary 370,371,372,373,374,375

If the BIOS is enabled:
BIOS Address  - Primary  16 Kbytes C8000H- CBFFFH
                Secondary  16 Kbytes CC000H-CFFFFH
Temporary Drive
Parameters Table  Interrupt locations 60H through 67H
*ACB-2372B only

Drive Power

The IBM PC AT internal power supply does have sufficient current to power 
most hard disk drives in addition to its present load. Check with your drive 
vendor for an accurate estimate of its specific power requirements.

TABLE 2-2.  ACB-2372B POWER REQUIREMENTS
(Typical)

+5V Power ________________>    1.7 Amp
-5V Power ________________>    Not Used
+12V Power _______________>    90mA 
-12V Power  _______________>   50mA 


TABLE 2-3.  ACB-2370B POWER REQUIREMENTS
(Typical)

+5V Power ________________>    1.1 Amp
-5V Power ________________>    Not Used
+12V Power _______________>    Not Used
-12V Power  _______________>   Not Used

CAUTION: The values for the power requirements were determined by actual 
measurements in an IBM PC AT while the controller was reading a hard disk. 
If these values are to be used to design the controller into a specific 
application, at least 20% should be added to these listed values as a safety 
margin.

2.7 Integration Into the System

To install the Adaptec ACB-237XB board into your system, you must first 
configure the drive(s), set the controller jumpers, and connect the drive 
cables properly. This section describes all the necessary steps to 
successfully install this hardware.

Step 1  Controller Jumper Setup and Definition

Before the Adaptec ACB-237XB can be used, some initial setup may be required. 
Figure 2-1 defines, in detail, connectors and jumper blocks for the ACB-2372B.
Figure 2-2 defines, in detail, connectors and jumper blocks for the ACB-2370B.

Step 2  Hard Disk Cabling, Drive Selection and Termination

The drive changeable parameters that must be set are the drive selection 
switches (or jumpers) and the drive termination. The drive selection switches 
and cabling select the address (drive address    1-4 ) to which the drive 
will respond. This is accomplished either by setting both drives to be the 
second lowest address and using a twisted 34-pin cable, or by setting the 
drive address to the lowest two addresses and using a flat cable.

A. Twisted 34-Pin Cable 

The typical AT 34-pin cable has three connectors. Between the first (middle) 
drive connector (for drive D) and the second drive connector (for drive C) 
wires 25 through 29 are twisted, thus inverting the drive selection wires. 
This type of twisted cable allows both drives to have their drive selection 
switches (or jumpers) to be the same. Both drives must be set to the SECOND 
lowest drive address. The controller will see the two drives to be drive 1 
and drive 2, depending on the position of the connector that is used.

B. Flat 34-Pin Cable

In some cases a 34-pin flat (non-twisted) cable is used.  This cable does 
not invert the drive selection wires but relies on the drive addresses to be 
unique for each drive. Now drive 1 must have its drive selection switches 
(or jumpers) set to be the lowest drive address (typically 1). Drive 2 must 
have its selection switches (or jumpers) set to be the second lowest drive 
address (typically 2). The controller will  see the two drives to be drive 
1 and drive 2, independent of the position on the connector that is used. 

C. Terminator

Before the drives can be cabled to the controller, the drive cable 
terminator must be properly set.  The terminator is used to reduce signal 
"ringing" in the cables. The terminator, as its name implies, must be at the 
end of each cable in order to have the controller and drive communicate 
properly. The controller has a permanent terminator built into it. The disk 
drives, since they can be connected in a daisy-chain configuration, have a 
removable terminator. This is usually a 16-pin DIP resistor package located 
on the drive PCB. The last physical drive in the chain must always have its 
terminator installed. When two drives are connected to the same controller, 
only the last one in the daisy chain is terminated. The other drive must 
have the terminator resistor removed.

Now select the proper drive addresses and remove or install the required 
terminators for your system.

Step 3 (ACB-2372B Only) Floppy Disk Cabling, Drive Selection and Termination

The typical AT 34-pin floppy disk cable has three connectors. Between the 
first (middle) drive connector (for drive B) and the second drive connector 
(for drive A) wires 10 through 16 are twisted, thus inverting the drive 
selection wires. This type of twisted cable allows both drives to have their 
drive selection switches (or jumpers) to be the same. Both drives must be set 
to the SECOND lowest drive address (typically 1 since floppy drives are 
addressed as 0-3). The controller will see the two drives to be drive 0 and 
drive 1,  depending on the position of the connector that is used.

Termination of the floppy disk drives is the same as the hard disk drives in 
step 2. 



  ACB-2372B CONTROLLER AND DRIVE CABLING-TWISTED CABLE (HARD DISK 
CABLES)


  ACB-2372B CONTROLLER AND DRIVE CABLING-FLAT CABLE (HARD DISK 
CABLES)


  ACB-2370B CONTROLLER AND DRIVE CABLING-TWISTED CABLE


  ACB-2370B CONTROLLER AND DRIVE CABLING-FLAT CABLE

Step 4  Mounting the Drives and Controller in the PC AT

Now that the drives and controller are configured, they can be connected and 
installed in the system.

ACB-2372B
The controller has four cable connectors: J1, J3, J4, and J5. Their function, 
suggested connector plugs and maximum cable length are described in Table 2-6.


  ACB-2372B CONTROLLER CONNECTOR DEFINITIONS


Connector Signals Cable

J1 Control/Data 34-pin flat ribbon cable. Connected to both floppy drives 0 
    and 1.
J3 Data 20-pin flat ribbon cable. Connected to RLL drive 2.
J4 Data 20-pin flat ribbon cable. Connected to RLL drive 1.
J5 Control 34-pin flat ribbon cable. Connected to both RLL drives 1 and 2.


Connector Rcommended Plug Maximum Length

J1 3M Part #3414 20 feet (6 meters)
J4 3M Part #3421 20 feet (6 meters)
J3 3M Part #3421 20 feet (6 meters)
J5 3M Part #3414 20 feet (6 meters)


ACB-2370B
The controller has three cable connectors:  J1, J2, and J3. Their function, 
suggested connector plugs and maximum cable length are described in Table 2-7.

 ACB-2370B CONTROLLER CONNECTOR DEFINITIONS
____________________________________________________________
Connector Signals Cable
J1 Data 20-pin flat ribbon cable. Connected to drive 1.
J2 Data 20-pin flat ribbon cable. Connected to drive 2.
J3 Control 34-pin flat ribbon cable. Connected to both 
   drives 1 and 2.

Connector Recommended Plug Maximum Length
J1 3M Part #3421 20 feet (6 meters)
J2 3M Part #3421 20 feet (6 meters)
J3 3M Part #3414 20 feet (6 meters)

Attach the cables to the controller, making sure that the pin 1 indicator on 
the cable goes to pin 1 on the controller. 

Now the controller must be installed into a 16-bit slot on the PC AT 
motherboard. Next, mount the drive(s) in any available drive bay in the AT. 
Consult your PC AT owner's manual for details of performing the installation 
of options into the motherboard expansion slots and for instructions on 
mounting a hard disk and floppy disk in the system. 


Section Three 

Software Installation


3.1 Introduction

To prepare a new hard disk for use, you must complete the primary-format and 
then install your operating system.

First, the primary-format is done using Adaptec's built-in BIOS. The procedure 
is described in this chapter, first with a flowchart, then with details describing the actual menu screens. If you run into problems while attempting to perform this installation, please refer to Chapter 4, Troubleshooting.


3.3 Adaptec ACB-237XB PRIMARY-Format Procedure for hard DISK Drives

Step 1: Setting up the PC AT configuration RAM for a single hard disk with the 
appropriate drive type

After you have completed the hardware installation of your ACB-2370B and hard 
disk drive, turn the system power switch on. Boot from the PC AT diagnostics 
diskette or any diskette that contains software for configuring the PC AT 
SETUP parameters (CMOS RAM).

Note:  When booting the PC AT with an UNFORMATTED hard disk installed, the 
system may report a "1790" disk failure. Ignore the message, press F1 to 
continue.

Invoke the SETUP RAM configuration software (i.e., option four in the IBM PC 
AT diagnostics program). Then follow the SETUP program's menu to set up your 
system for one or two hard disks. Be sure to choose drive types that are a 
subset of the actual disk parameters. The number of cylinders indicated by the 
drive type specified must be less than the actual number of cylinders on your 
drive. For example, with the IBM PC AT, use drive type 1 (smallest available 
drive type) regardless of the actual drive configuration. This is necessary 
for proper operation of the PC AT power-on diagnostics.

After the PC AT internal configuration has been set up, reboot the system with 
DOS Version 3.0 or higher.

Step 2:   Use DEBUG to enter the Adaptec Disk Preparation Program 

Put a disk with a copy of DOS' DEBUG program into the floppy drive and invoke 
the program by typing DEBUG at the DOS prompt, then press return. At the debug 
prompt, type G=C800:5 and press return. This will invoke Adaptec's Disk 
Preparation Program.

Step 3: Read the RLL Drive Parameters

Select Option 1 to primary-format the drive 1. If the drive has been 
previously formatted with an ACB-2370B controller, the saved cylinder and 
head count will be displayed. With an unformatted drive, the number of 
cylinders, heads and sectors are read from the RLL drive. If the values are 
not correct, type N, exit the program and check your RLL drive jumper settings.

An example of what you will see on the screen for a brand new drive is shown 
below.

Note:  One cylinder on the drive is reserved for use by the controller. The 
controller automatically subtracts this cylinder from the total number of 
available cylinders on the drive.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A>DEBUG     <CR>
-G=C800:5   <CR>

Adaptec Disk Preparation Program   V 3.0
Copyright (c) 1988  Adaptec, Inc.  All rights reserved.
Choose: 1- to primary-format drive 1
        2 - to primary-format drive 2
        3 - for the special-options menu
        q - to quit this program

 Enter your selection :  1 

Drive 1 has XXX cylinders, X heads, XX sectors
Are the above correct (Y/N): [Y]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Step 4: Choose to ERASE or NOT ERASE the Adaptec Saved Defect List 

If your drive was previously formatted with Adaptec's ACB-2370B, the saved 
defect list will now be displayed. normally do not erase the saved defect 
list. If you choose to erase, perhaps because a previous error has resulted 
in a false defect map, then the Adaptec saved list will be erased. The  drive 
manufacturer's list is not erased.

Step 5: Enter Any More Defects

Next, the program will prompt you for the drive defect format. If you have 
no additional defect locations to enter, then select Option 1. Otherwise, 
choose the defect format that matches the list of defects you wish to enter.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Saved defect list (cyl/physical sector) :
Surface 0:
            XXXX/XX     XXXX/XX
Do you want to ERASE saved defect list (Y/N) ?  N  
Please specify the format of additional defects:
     1 - No Additional Defects
     2 - Cyl/Head/RLL byte offset
     3 - Head/Cyl/RLL byte offset
     4 - Cyl/Head/Logical Sector	

 Enter your selection :  1  
 Press <RETURN> to enter defects from the console, or type the defect  file 
  name :
 Enter defect at the * prompt, (a blank line will end the list) :
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

If you have entered a defect list, it will be displayed on the screen for 
you to verify. Note that the defect locations have been translated into 
cylinder/physical sector format. Surface numbers correspond to head numbers. 
(Choice 4 CYL/HD/LOGICAL sector, only appears with a previously formatted 
drive. This allows the user to add "grown" defects at a later date.)

Step 6: Select Interleave Factor 

Now select an interleave by typing the desired interleave factor (1 to 12) 
and pressing return. An interleave factor of one is the default. 

Step 7: Allow a Spare Sector for Defects?

For example, if an RLL format has 26 sectors on a track, this option formats 
with 25 sectors and uses the 26th sector as a spare. When one sector must be 
marked bad due to a surface defect, the spare is used instead. Then the drive 
appears error-free to the operating system. However, 1/26th of the drive 
capacity is not used. Normally, you will want to take the default [N].

Note: If you select spare-sectoring, you will not be able to use the 17 or 63 
sector translation options.

If you have entered a defect list, it will be displayed on the screen for 
you to verify. Note that the defect locations have been translated into 
cylinder/physical sector format. Surface numbers correspond to head numbers. 
(Choice 4, CYL/HD/LOGICAL sector, only appears with a previously formatted 
drive. This allows the user to add "grown" defects at a later date.)

Step 8: Primary Format the Drive, Automatic Data Verification and Automatic 
Flagging of Bad Sectors 

Check to be sure that all of the parameters that you have entered are correct, 
then enter Y to continue.  Enter Y to primary format the drive. The controller 
will now perform the primary format. The program formats the drive from high 
cylinder to low cylinder, marking the defects as bad sectors. After formatting 
each track, the program will write and verify the track with worst case data 
patterns. Any defective sectors found during this write/verify process that 
are not in the defect list will be added to the defect list. The same track 
is reformatted with the newly found defective sectors marked bad. The track 
is then written and again verified against defects. The process is repeated 
for every track on the drive. ECC retries are disabled during this 
verification.

When the controller has finished formatting the drive, you should see 
"Primary-Format complete!" displayed at the bottom of the screen, indicating a 
successful format. An example of what you should see on the screen is shown 
below.

Note: If the format operation does not complete properly, (i.e., Primary-
Format complete! is not displayed after formatting) see Chapter 4, 
Troubleshooting.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Total defect list (cyl/sector) :

Surface 0:
            45/10  208/28 (for example)
Surface 1:

Surface 2:

Surface 3:
Interleave (1 to 12) : [1]
Allow a spare-sector for defects (y/n) : [n]
 
Ready to primary-format the drive. All data in it will be lost!!

Continue (Y/N)? [Y]

Formatting and verifying drive ...

Head XX  Cyl XXXX

Primary-Format complete ! 
Now select q to quit, and go to your Operating System installation (e.g. 
DOS FDISK and FORMAT)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Step 9: Choose [q] to quit Adaptec's Primary-Format program.

Step 10:  Next, the operating system must be installed. For most users, this 
consists of running the *DOS programs FDISK and FORMAT. DOS 4.0, OS/2, SCO 
XENIX and ISC UNIX have menus that guide the user through their installation. 
Refer to the vendor's manual for help with installing your operating system.

Note: DOS 3.0, 3.1 and 3.2 have a limit of 32 MB per drive. DOS 3.3 allows a 
large drive to be split into 24, 32 MB partitions. DOS 4.0 allows up to 
1024 MB to be used as one drive.



3.4 SPECIAL OPTIONS

There are several special technical options built into the ACB-2370B 
controller. These features are not used by most users, but are of interest to 
those with unusual applications. The special option menu is accessed by 
selecting choice 3 from the main menu.

The following menu will come up:

Choose 1 - to enable 17-Sector translation
       2 - to enable 63-Sector translation
       3 - to disable translations
       4 - to generate Adaptec auto-configuration device-driver
       q - to return to main menu

Each choice is described below.

Choices 1, 2 and 3 turn on and off two different translation modes. After any 
translation option is changed, a flag in the partition table is changed to 
make any previous partitions unusable. This means that any previous data on 
the drive will become inaccessible. The operating system must be re-installed 
onto the selected drive each time a translation option is changed. The 
primary-format does not need to be re-done.
You are not allowed to use translation on drives that have been primary-
formatted with sector-sparing. Re-do the primary-format without sector-
sparing if you want to use translation.

Choice 1: 17-Sector Translation

Choice 1 allows RLL formats to look like a 17-Sector format. This is useful 
for programs, such as Novell Netware, that only use 17 sectors per track.

Note: This option does NOT mean you can use an MFM drive with this controller. 
Only RLL certified drives should be run on the ACB-237XB.

To get 17-Sector translation, answer these questions on the screen.

Translate drive 1 or 2? : 1

Enable translation on drive (1)? (Y/N) : Y 

Drive (1) is now in 17-Sector translation mode!


Choice 2: 63-Sector Translation

DOS has a limit of 1024 cylinders per drive. This option will allow use of 
drives with more than 1024 cylinders, up to 530 MB capacity. The drive 
parameters are translated to a 63-Sector equivalent.

Enable translation for drives larger than 1024 cylinders by answering the 
following questions on the screen.

Translate drive 1 or 2? : 1

Enable translation on drive (1)? (Y/N) : Y

Drive (1) is now in 63-Sector translation mode!

Choice 3: Disable Translation

This option disables any translation mode currently in effect on your drive.

Answer these questions to disable translation.

Disable translation on drive 1 or 2? : 1

Disable translation on drive (1) now? (Y/N) : Y

Choice 4: Auto-Configuration driver.

Autoconfiguration for non-listed drive types.

In DOS 3.X, Interrupts 60-67 are available for use as vectors to user programs.

Adaptec 237X controllers use the memory space occupied  by Int 60-67 as a 
data area, instead of for vector pointers. We store the drive parameters 
there, in a table. Sixteen bytes (Int 60-63) are for drive 1, and 16 bytes 
(Int 64-67) are for drive 2. These tables contain the true cylinder, head and 
sector count for each drive. This feature allows the user to install 
hard drives that do not match the standard list of drive types in the PC AT 
BIOS.

Occasionally, products such as expanded memory or disk caching, will want to 
use Interrupts 60-67 as vectors to their code. This will conflict with our 
use of these locations, because our drive table will be overwritten by their 
pointers.

For this special case, we have included an autoconfiguration driver in your 
controller BIOS. This driver can be downloaded from your controller and put 
into a CONFIG.SYS file on your hard drive. At system boot, DOS will execute 
the device driver. With the driver installed, we do not use Int 60-67 to 
store the drive parameter table. Instead, the standard hard drive interrupts 
41 and 46 are used as vectors to point to our drive table, which is now in a 
protected memory location reserved by DOS.

When to use the autoconfiguration driver.

You may want to copy the auto-configuration driver into a CONFIG.SYS file on 
your boot disk. This will ensure that no software will conflict with your 
hard disk table. However, if you have no software that uses Int 60-67, you 
can run without a device driver installed.

The following have been reported to need Int 60-67 locations:

Superpck Cache Triangle CICS/PC Emulator
Desqview Columbia Kermit
IBM Displaywrite 3  Wang Terminal-Emulator cards

How to use the autoconfiguration driver.

The autoconfiguration driver is accessible by using the DEBUG program from 
your hard drive or your DOS floppy.

At the prompt enter:

 A>DEBUG  <CR>
 -G=C800:5  <CR>

The Adaptec Disk Preparation Menu will come up on the screen.

Choose option 3, "for special options menu".

Then choose 4 - to generate Adaptec auto-configuration device driver.

A copy of the driver will now be written onto the specified drive.

Now create or modify your CONFIG.SYS file to include the driver.

If you have an already existing CONFIG.SYS file on your hard drive, then 
modify the file to have DEVICE = ADAPTEC.DVR as the first statement.

If you do not have an existing CONFIG.SYS file, then create one in the 
following way:

 C>COPY CON CONFIG.SYS  <CR>
 DEVICE = ADAPTEC.DVR  <F6> <CR>

Now your drive table will be located in a protected area at boot time.



4.1 Introduction

This section describes the procedures needed to troubleshoot problems that 
may arise when installing the Adaptec ACB-237XB controller board. These are 
the most commonly found problems and are not inclusive of every application.

CAUTION: When troubleshooting problems, use the most basic system 
configuration; That is, one hard disk drive on the ACB-237XB and all other 
devices such as printers, modems, etc. removed. Once the system works for 
the basic configuration, add drives and devices to the system one at a time 
and retest after each addition.

If these procedures fail to give a solution to your problem, recheck your 
steps, read the entire manual, document the problem, and check with the 
technical support department where you bought the controller.

4.2 Adaptec ACB-237XB Troubleshooting Checklist

Gets a 1790 at boot-up
A 1790 Error is normal for an unformatted drive. Just press F1 to continue.

Long boot time
Some PC AT systems may continue to retry booting to the hard drive even 
though it has not been formatted yet. You will have to allow this re-trying 
to continue for up to two minutes before the system will boot to the floppy 
drive. Then you can proceed to Debug and format the drive.

Can't read floppy or boot to A
For the ACB-232XB, check floppy cables; be sure J1 goes to both floppy drives. 
Be sure that Pin 1 on the controller is connected to Pin 1 of the drive. If 
only one drive is being used, only the last connector on the twisted cable 
should be used. A floppy cable has wires 10-16 twisted between the two 
drive connectors.

Recal error, or no drive attached error
Check the drive select jumper on hard disk drive; be sure that it is 
correctly set for the type of cable you are using (See Section 2.7)

For the ACB-2372B, be sure J4 goes to Drive 1, J3 goes to Drive 2, and J5 
goes to both drives. Be sure that Pin 1 on the controller is connected to 
Pin 1 of the drive. If only one drive is being used, only J5 and J4 should 
be used. 

For the ACB-2370B, be sure J1 goes to Drive 1, J2 goes to Drive 2, and J3 
goes to both drives. Be sure that Pin 1 on the controller is connected to 
Pin 1 of the drive. If only one drive is being used, only J1 and J3 should 
be used. Do not use a floppy cable for hard drives.

Incorrect drive parameters
RLL drives have jumpers for "number of sectors per track" and for "bytes 
per sector", also for hard or soft sectoring. Consult your drive vendor for 
proper settings of these jumpers.

Miscellaneous errors, or no format routine
Check jumpers on controller.

Excessive defects, or fails to format
Make sure the drive is ESDI certified. Check with the manufacturer.

Won't boot to C
Check to see that the SETUP program and CMOS RAM show drive type 1 is selected.

Intermittent operation errors; or Read/Write errors
Check that the terminator on each drive is set properly (see Section 2.6)

Check that the power supply can support the added current required by the 
drive. Be sure that the +5V and +12V voltages are correct. Consult with the 
drive vendor for the correct drive power requirements.

For system hang or boot problems
Try installing the BUS WAIT STATE jumper. The DTK 10MHz system needs this 
jumper installed on the controller board.

If none of the above steps cure the problem, then swap out components in 
this order:
Replace the cables with a known-good set of cables.
Swap the drive with a known-good drive.
Swap the 2372B controller with another 237XB controller.


2.4.3 Controller Error Codes

Tables 4-1 through 4-5 specify class 00, 01, 02, 03, and 04 error codes which 
may be returned by the ACB-237XB. Note that the most significant bit (the 
address valid bit) of the one-byte error code may be set in some cases. Thus, 
80-8F, 90-9F, A0-AF, B0-BF, and C0-CF are also valid errors corresponding to 
error codes 00-0F, 10-1F, 20-2F, 30-3F, and 40-4F, respectively.

Table 4-1.  class 00 error codes (drive errors)

Code Error
00 No Error Occurred During Last Command
01 No Index Signal Found
02 No Seek Complete Found
03 Write Fault Found
04 Drive Not Ready
05 Not Assigned
06 No Track 00 Signal
07 Not Assigned 
08 Seek Operation Not Yet Complete
09 Not Assigned 
0A Not Assigned
0B RLL Interface Fault
0C RLL Seek Fault
0D RLL Parity Error
0E Bad RLL Configuration
0F Not Assigned 


Table 4-2.  class 01 error codes (data recover errors)

Code Error
10 ID ECC Error
11 Uncorrectable Data ECC Error Found
12 ID Address Mark Not Found (sector not found)3 Data Address Mark Not Found
14 Sector Not Found (no ID errors found)
15 Seek Error (wrong cylinder)
16 No ID AM and ID ECC error (sector not found)
17 Not Assigned 
18 Corrected ECC Error(s)
19 Access to Sector Flagged As Bad
1A Format Error Detected
1B-1F Not Assigned 

Table 4-3.  class 02 error codes (system-related errors)

Code Error
20 Invalid Command
21 Illegal Parameter (cyl., head, sector)
22 Not Assigned 
23 Cylinder Overflow (during command)
24 Format Command With the Wrong Number of Sectors Per Track
25-2F Not Assigned 


Table 4-4.  class 03 error codes (diagnostics errors)

Code Error
30 Internal CPU RAM Failed
31 Controller ROM Checksum Error
32 ECC Diagnostic Failed
33 SERDES RAM Failed
34 Disk Buffer RAM Failed
35 Buffer Controller Registers Failed
36 Drive Interface IC Failed
37 Host Interface IC Failed
38 CPU Self-Test Failed
39-3F Not Assigned 


Table 4-5.  class 04 error codes 
(Timeouts and misC. errors)

Code Error
40 Data Time-Out
41 Format Time-Out
42 SERDES Time-Out
43 Selection Time-Out

2.4.4 BIOS Error Codes

Table 4-6 specifies error codes that may be returned during format or verify.

Table 4-6.  bios error codes

Code Error
01 Bad Command Passed to Disk I/O
02 Address Mark Not Found
04 Requested Sector Not Found
05 Reset Failed
07 Drive Parameter Activity Failed
09 Attempt to DMA Across 64K Boundary
10 Access to Bad Sector
0B Bad Track Flag Detected
10 Bad ECC on Disk Read
11 ECC Corrected Data Error
20 Controller Timeout
40 Seek Operation Failed
80 Attachment Failed to Respond
BB Undefined Error Occurred
FF Sense Operation Failed


Section Five

Appendices


APPENDIX A: Installing SCO XENIX V.2.2 with Adaptec ACB-23XX Disk Controllers

Adaptec ACB-237X controllers are fully compatible with SCO Xenix V.2.2 and 
newer. The following instructions describe the process for installing the 
Xenix operating system on a disk subsystem using an Adaptec AT disk 
controller. The following items are required to successfully perform this 
installation:
1)  SCO XENIX V.2.2 or newer. Operating system software and documentation
2)  DOS 3.1 or newer, Operating system software and documentation
3)  PC AT-compatible computer
4)  Adaptec ACB-237X disk controller
5)  Hard disk drive (RLL for use with ACB-237X, RLL for ACB-237X)

A.1 INSTALLING THE DISK SUBSYSTEM

First, the hard disk and controller must be installed in the AT and formatted 
for use by the Adaptec controller. See Sections 2 (Hardware Installation) and 
3 (Software Installation) of the Adaptec ACB-237X User's Manual.

When the hard disk has been successfully formatted with a single volume for 
the entire disk, you are ready to proceed with the installation of the Xenix 
operating system.

A.2 INSTALLING THE XENIX OPERATING SYSTEM

To install Xenix, follow the installation instructions given in the SCO XENIX 
System V Operating System Run Time Environment (HW) reference manual. The 
instructions are given in Chapter 2, "Installation Procedure"> During this 
installation process, the dkinit program (invoked by hdinit) is used to set 
the parameters for the hard disk. At this point, be sure to select option 1 
(Display current disk parameters) and verify that the values displayed for 
cylinders, heads and sectors/track are correct. If the parameters are not 
correct, please retry this installation procedure. If correct, continue with 
the Xenix installation as directed.

If any problems are encountered during the Xenix installation, please see 
Section 2.7 of the SCO Xenix, Run Time Environment (HW) reference for 
troubleshooting information.



APPENDIX B: INSTALLING ISC UNIX 386/ix WITH ADAPTEC ACB-237X DISK CONTROLLERS

Adaptec ACB-237X controllers are compatible with ISC UNIX SYSTEM V 386/ix, and 
newer. The following instructions describe the process for installing the 
Xenix operating system on a disk subsystem using an Adaptec AT disk controller.

The following items are required to successfully perform this installation:

1) ISC UNIX 386/ix, or newer. Operating system software and documentation. 
2) PC AT-compatible computer.
3) Adaptec ACB-23XX disk controller
4) Hard disk drive (RLL for use with ACB-237X, RLL for ACB-237X).

B.1 INSTALLING THE DISK SUBSYSTEM

First, the hard disk and controller must be installed in the AT and formatted 
for use by the Adaptec controller. See Sections 2 (Hardware Installation) and 
3 (Software Installation).


B.2 INSTALLING THE UNIX OPERATING SYSTEM

To install UNIX, follow the installation instructions given in the ISC UNIX 
386/ix User's Manual titled "Using 386/ix Products Managing 386/ix Products. 
The instructions are given in Section 3, "Installation Procedure".



APPENDIX C: OS/2 Installation Procedure and Adaptec ACB-237X Compatibility 
with MS OS/2 and IBM OS/2

C.1 OS/2 COMPATIBILITY

Adaptec ACB-237X controllers have been tested successfully with IBM OS/2 
version 1.0. However, due to a problem discovered with Microsoft's version of 
OS/2, any 1:1 interleave hard disk controller is not compatible with the 
current MS OS/2 revision 1.0. A specific revision of the Microsoft OS/2 hard 
disk device driver is required for reliable operation of any ACB-237X product 
with MS OS/2 1.0.

C.2 NEW DISK01.SYS REQUIRED FOR MS OS/2 OPERATION

The name of the device driver that must be replaced is DISK01.SYS. This device 
driver is available from Microsoft, although a specific revision number of the 
file was not available at the time this note was written. However, the driver 
can be referenced as the latest revision of DISK01.SYS. For those on the 
Microsoft developers program, it is also available on the Microsoft developers 
bulletin board as DISK01.NEW. Also, the new revision of the device driver will 
be supplied in the next release of OS/2 from Microsoft. This driver was 
originally made available to correct problems observed when MS OS/2 was used 
on Compaq 386 machines with a 1:1 interleave, RLL hard disk subsystem. The 
failure mode, observed when using the DISK01.SYS supplied with MS OS/2 1.0, 
was a random rebooting of the system during, and/or after, reading data from 
the hard disk.

Microsoft OS/2 versions 1.0 and 1.02, with the replacement disk device driver 
(described above), have been tested with the ACB-237X controllers and were 
found to be fully compatible.

C.3 WINDOWS COMPATIBILITY

Microsoft Windows 286 and Windows 386 have both been tested and are fully 
compatible with Adaptec's ACB-237X products. Both software packages work 
whether invoked from the DOS operating system, or from the DOS compatibility 
window under the OS/2 operating system.

C.4 OS/2 INSTALLATION

Disk preparation under OS/2 is very similar to DOS disk preparation. OS/2 
uses the FDISK.COM and FORMAT.COM programs to create and format OS/2 
partitions on the fixed disk. The following instructions outline basic fixed 
disk preparation, and OS/2 installation.

First, the hard disk and controller must be installed in the AT and formatted 
for use by the Adaptec controller. See Sections 2 (Hardware Installation) and 
3 (Software Installation) of the Adaptec ACB-237X User's Manual. You will need 
the DOS operating system and DEBUG utility to successfully complete this 
installation. OS/2 does not have a DEBUG-like utility.

During the software installation process (Section 3 of the ACB-237X User's 
Manual), Follow the instructions given for preparing a disk for use with 
DOS 3.3).


Finally, insert the OS/2 installation diskette in the floppy drive, and press 
Ctrl+Alt+Del to reboot the system. The OS/2 operating system will boot and the 
installation program will automatically guide you through the FDISK and 
FORMAT procedures for your fixed disk, as well as completing the OS/2 
installation.



APPENDIX D: USING 17-SECTOR EMULATION WITH THE ACB-2372B

The Adaptec ACB-2372B supports a 17-sector emulation mode. This provides 
compatibility with operating systems and software that are not capable of 
utilizing a disk that has greater than 17 sectors per track.

This feature can be used by either of two methods, one using the Adaptec 
controller BIOS, the other with the Adaptec BIOS disabled. The first method 
utilizes Adaptec's method of autoconfiguration to provide logical disk 
parameters that match exactly with the available capacity on your disk drive. 
The second method uses the drive type tables supplied in your motherboard BIOS 
to select logical parameters that approximate the actual capacity of your 
drive.

D.1 USING 17-SECTOR  EMULATION WITH THE ADAPTEC BIOS ENABLED

To use this function with the Adaptec controller BIOS enabled, follow the 
controller installation and drive formatting procedures as described in 
Sections 2 and 3.

Then, select the 17-sector emulation option from the Adaptec format program 
special options menu (see Section 3.3).

When this has been completed, the controller and drive will be ready for 
use by the operating system. When the system boots, the controller will 
report a set of logical parameters to the operating system that allow 
access to the full drive capacity. The parameters will consist of a fixed 
value of 17 sectors per track, a calculated logical head count, and 
calculated logical cylinder count.

D.2 USING 17-SECTOR EMULATION WITH THE ADAPTEC BIOS DISABLED

If you wish to use 17-sector emulation, but cannot use Adaptec's 
autoconfiguration (e.g. for Novell compatibility), it is possible to disable 
the Adaptec BIOS and still use this function. This method uses the motherboard 
BIOS drive tables to supply the logical parameters for your drive. Since 
there are a limited number of standard drive-type tables available, it may 
not be possible to select a drive type that matches your drive exactly.

First, install the controller and format the drive as described in Sections 
2 and 3 of this manual.

After completing the format, disable the Adaptec controller BIOS by setting 
the BIOS address selection jumper in the position that disables the BIOS 
(see Section 2.4).

Now, instead of setting your PC AT CMOS RAM for drive type 1, select a drive 
type table that has the closest capacity possible to your actual drive. Use 
the table in Table A-1 to identify the drive type table that is closest to 
the capacity on your drive.

Note: Table A-1 applies to IBM-compatible drive types 1-23 only. Your mother 
board BIOS may support drive types other than those listed above. Consult 
your owner's manual or contact your PC AT manufacturer to identify any other 
drive types that may be available in your motherboard BIOS.

To use a drive type not listed in Table A-1, calculate the capacity of the 
drive, and the capacity described by the drive type that you wish to use. 
Select the drive type that is as close as possible, but not greater than 
the capacity of your drive.

Note: The capacity of a drive is calculated as follows:

CAPACITY (Bytes) = HEADS x CYLINDERS x SECTORS/TRACK x 512

Ideally, the capacity obtainable by the logical drive parameters should equal 
that of the physical drive parameters.

D.3 LOGICAL DRIVE PARAMETERS AVAILABLE USING IBM-COMPATIBLE DRIVE TYPES 1-23

TABLE 5-1. LOGICAL DRIVE PARAMETERS

Drive capacity (bytes) is:

At least                     but less than             Then select drive type

10,653,696                   21,307,392                            1
21,307,392                   21,411,840                           16
21,411,840                   31,900,160                            2
31,900,160                   32,117,760                            8
32,117,760                   32,169,984                            3
32,169,984                   37,209,600                            7
37,209,600                   42,519,040                           11
42,519,040                   44,660,224                           17
44,660,224                   49,090,560                           14
49,090,560                   52,093,440                            5
52,093,440                   57,098,240                           12
57,098,240                   59,526,656                           10
59,526,656                   62,390,272                           18
62,390,272                   65,454,080                           19
65,454,080                  117,504,000                            4
117,504,000                                                        9



APPENDIX E: INSTALLING NOVELL WITH THE ACB-2372B

The ACB-2372B fully supports all revisions of Novell Netware. Netware is not compatible with Adaptec 
autoconfiguration of drive parameters, but the 17-sector emulation, and/or 
extended drive-type tables on the motherboard make it possible to supply 
non-standard RLL disk parameters in a method compatible with Novell. It is 
not necessary to modify the Netware software in any way to support the 
controller.

E.1 INSTALL THE CONTROLLER AND HARD DISK

First install the controller and format the hard disk as described in 
Sections 2 and 3. When the format is complete, disable the Adaptec controller 
BIOS. 

E.2 SELECTING DRIVE PARAMETERS FOR USE WITH NOVELL

Since the Adaptec autoconfiguration should not be used with Novell Netware, 
it is necessary to disable the Adaptec controller BIOS (see Section 2.4). It 
is then necessary to select a drive-type that will correctly describe your 
hard disk.

E.3 USING EXTENDED DRIVE TYPE TABLES

Many motherboard BIOS manufacturers now provide drive-type tables that support 
RLL hard disk controllers. Several also support programmable drive type 
tables. If your motherboard BIOS has this capability, then it is possible to 
use either an existing drive type table, or a programmed table to select 
drive parameters for use of the ACB-2372B with Novell Netware. Consult your 
PC AT reference manual, or contact your PC AT manufacturer for information 
on the drive-types available in your system.

If a drive-type table is available that corresponds exactly with your drive 
parameters, including heads, cylinders and sectors per track, then select that 
drive table.

If your motherboard BIOS does not have an exact drive-type table including the 
correct sector per track value, but supports programmable drive-type tables, 
then create a drive-type table that is correct for your drive. Select the 
drive-type that you have created as the type of disk installed.

If your motherboard BIOS neither has the exact drive type available, nor the 
ability to program a custom drive type table, then Adaptec's 17-sector 
emulation may be used to translate existing motherboard drive type tables into 
the physical parameters of; your drive. To do this, follow the instructions in 
Appendix IV for the use of 17-sector emulation with the Adaptec BIOS DISABLED.

E.4 INSTALLING THE NETWARE

Once the drive has been formatted and the correct drive-type table selected 
for your drive, Netware may be installed. Follow the instructions given in the 
Netware installation documentation to successfully prepare and install Netware 
on your hard disk.

APPENDIX F: Operating system SUPPORT;
Adaptec's ACB-23XX Family

VENDOR
                           O/S                                   Revision
Interactive Systems   Unix 386/ix                                1.03
Corporation                                                      1.04
2401 Colorado Ave.
Santa Monica, CA 90404
213-453-8649

Santa Cruz            SCO XENIX V                                 2.2
Operation	/286/386
400 Encinal St.
P.O. Box 1900
Santa Cruz, CA
95061-9990
408-425-7222

Microsoft Corp.       PC/MS DOS                                  3.X
16011 N.E. 36th Way
Box 97017             MS/OS/2 with                               1.0
Redmond, WA           DISK01.SYS
98073-9717            MS OS/2                                  1.02 
206-882-8080

Microport Systems     System V/386                            2.2RLL
10 Victor Square
Scotts Valley, CA
95066
800-722-UNIX
800-822-UNIX (In CA)

Ontrack Computer       Disk Manager
Systems	Disk Manager  N
6200 Bury Drive
Eden Prairie, MN
55346
612-937-5815

The Software Link     PC-MOS
3577 Parkway Ln.
Atlanta, GA 30092
404-448-5465

IBM Corp.             OS/2 Std.                                1.0
Old Orchard Rd.
Armonk, NY 10504      OS/2Std.                                 1.1
914-765-1900

Golden Bow Systems    Vfeature Deluxe                         2.57
2870 Fifth Ave., Ste. 201
San Diego, CA 92103
(619) 298-9349

Storage Dimensions    Speedstor                               5.11
2145 Hamilton Ave.
San Jose, CA 95125
(408) 395-2688

Novell, Inc.          Novell                                  2.0a
122 East                                                       2.1
1700 South                                                    2.11
Provo, UT 84601                                               2.12
(800) 453-1267
F