Contents

               Limited Warranty

    Enhancements To The Iomega Host Adapter Boards

            Support for MSDOS 4.X

               Fast Host Option

               32Mb Restriction

         Booting From Disk Cartridges

   Installation Using The Iomega SETUP Program

             Iomega Verify Option

    Enhancements to the Iomega rcd Utilities

                  RCDINSTALL

          Installing Multiple Drivers

           The Verify Setting Option

                   RCDTOOLS

  Using Cartridge Scan To Determine Cartridge Life

       Using Surface Scan and File Scan





All portions of RCD utilities software are copyrighted
and are the proprietary and trade secret information of
Iomega Corporation and/or its licensor.  Any
unauthorized use, reproduction or publication of any
portion of this material without the prior written
consent of Iomega Corporation is strictly prohibited.
The Bernoulli Box, the Iomega logo, the Bernoulli
Technology logo, and Bernoulli Box Plus are registered
trademarks of Iomega Corporation.
Bernoulli Box II, Bernoulli Box II 44, and Bernoulli
Drive II are trademarks of Iomega Corporation.


MS-DOS is a registered trademark of MicroSoft
Corporation.
The IBM logo and IBM PC are a registered trademarks and
IBM PC Network is a trademark of International Business
Machines Corporation.


Copyright  1989, Iomega Corporation, All Rights
Reserved

Printed in U.S.A.

Iomega RCD Utilities	

This update pamphlet contains information for the
updated Iomega Removable Cartridge Drive (RCD)
Utilities and Iomega device drivers for the Model PC2,
PC2B, PC4, and PC4B host adapter boards.  This
information is supplements and/or changes the
information contained in the RCD Utilities User's
Manual and Reference Guide (Iomega part number
00590800), and the Host Adapter Board Owner's Manual
(Iomega part numbers 0068801 and 00303900).  The latest
versions of the RCD utilities have the following new
items and functions.
	Support for operating Bernoulli Box products under
MSDOS 4.X including booting from a Bernoulli Box disk
cartridge.
	Support for disks larger than 32Mb under MSDOS
3.X including booting from a partitioned disk cartridge
and using a 44Mb 5 inch disk cartridge as a data disk.
	Support and enhancement of the MSDOS VERIFY
function including extended error correction and
autoreallocation of sectors on 20Mb and 44Mb 5 inch
disk cartridges.
	Installation of multiple Iomega device drivers on
the same disk cartridge for booting systems with
different Iomega host adapter boards.
	A Bernoulli Box disk cartridge scan function for
tracking cartridge life and detecting bad sectors and
files using bad sectors on a disk cartridge.





             Limited Warranty

Refer to the warranty information that comes with your
Bernoulli Technology products for specific warranty
information regarding product warranties.  If you did
not receive a warranty information packet, contact your
dealer.
  Please Note  The warranty in the warranty information
packet is effective on all products purchased after
January 1, 1989. 

The Iomega device drivers (RCD.SYS and RCD4.SYS) for
the Model PC2/PC2B and Model PC4/PC4B host adapter
boards now support the Iomega verify option.  The
Iomega SETUP program (SETUP.EXE) can now install
multiple Iomega device drivers in the CONFIG.SYS file
and allows you to specify a setting for the MSDOS
verify function.





               Fast Host Option

To install the fast host, use your word processor or
line editor to change the Config.sys file that reads
DEVICE=RCD.SYS to DEVICE=RCD.SYS /F.  After changing
 the Config.sys file, turn off your computer and change
SWITCH 4 on the host adapter board to the ON (up or PIO
selected) position. 





             Support for MSDOS 4.X

The Iomega device driver and RCD utilities support
operation of Bernoulli Box products under MSDOS 4.X.





                32Mb Restriction

As a feature of MSDOS 4.X support, this version of the
Iomega device driver and RCD utilities allows the use
of disks larger than 32Mb under MSDOS 3.X.  Support
for large disk drives allows use of an entire 44Mb disk
cartridge while operating under MSDOS 3.X.  Support
does not allow for booting from a disk cartridge larger
than 32Mb under MSDOS 3.X; however, the RCDPARTITION
utility allows a 44Mb disk cartridge to be partitioned
down to the 32Mb limit for booting under MSDOS 3.X.





         Booting From Disk Cartridges

Several conditions must be met before the computer
system can boot from a disk cartridge in the Bernoulli
Box.
	A bootable Iomega host adapter board (Models PC2B,
PC4B) must be installed in the computer system.
	The Bernoulli Box drive must be drive C since
MSDOS permits the system to boot only from drive A or
drive C.  If you already have a fixed disk drive
designated as drive C in your system, the system cannot
boot from the Bernoulli Box.
	The Bernoulli Box disk cartridge must be formatted
using the RCDFORMAT utility with the /S option, which
copies the system files to the RCD cartridge.
	The Iomega device driver and CONFIG.SYS files must
be installed on the Bernoulli Box disk cartridge.
	If the disk cartridge is a 44Mb disk cartridge,
you must use MSDOS 4.X or Compaq DOS 3.31 or partition
the disk to 32Mb for MSDOS 3.X.





    Installation Using The Iomega SETUP Program

The Iomega SETUP program (SETUP.EXE) has been enhanced
to install multiple Iomega device drivers in the
CONFIG.SYS file and allows you to specify a setting for
the MSDOS verify function.
See the description of these functions in the
enhancements to "RCD INSTALL" section of this update
pamphlet.





             Iomega Verify Option

The Iomega verify option provides you with a powerful
data integrity tool.  This option supports and enhances
the MSDOS VERIFY option.  Although all Bernoulli Box
products offer exemplary data integrity, the VERIFY
option improves data integrity in all mass storage
devices.  Use of the VERIFY option with all your
storage devices is recommended.
Verification provides the following advantages.
	All information is verified as it is written. 
This verification assures that the information written
to the disk cartridge was written correctly.
	Iomega Bernoulli Box II drives provide an
enhancement to the MSDOS VERIFY option. When the
VERIFY option is used, the Bernoulli Box II drives
allow the device driver to reallocate bad sectors
automatically on the disk.  If a sector fails to verify
correctly, the VERIFY option causes the driver to check
to see if the failure was caused by a bad sector.  If a
bad sector is found, it is flagged, a spare sector is
allocated, and the information then is written to the
good sector.
	The automatic reallocation of sectors reduces the
possibility of encountering a disk error while the
computer is using a Bernoulli Box II drive.  Spare disk
space, available on all Iomega disk cartridges, is used
to replace bad sectors during formatting.  If verify is
turned on and the drive in use is a Bernoulli Box II
drive, bad sectors are replaced automatically during
write operations.  Refer to the "Enhancements To RCD
TOOLS" section of this update for information on
automatic reallocation of sectors.
  Warning:  Turning off the VERIFY option could result
in overlooking information that has been written
incorrectly. 
The Iomega device driver automatically follows the
MSDOS VERIFY command.  However, it may be advantageous
to verify only the information written to Bernoulli Box
disk cartridges.  A special option switch is available
through the device driver to turn on the VERIFY option
exclusively for Iomega drives.  To take advantage of
the verify feature on Iomega drives only, use your word
processor or line editor to make the following change
in the CONFIG.SYS file.  For drives connected to a PC2
or PC2B host adapter board, change the line that reads
DEVICE = RCD.SYS to DEVICE = RCD.SYS /V.  For drives
connected to a PC4 or PC4B host adapter board, change
the line that reads DEVICE = RCD4.SYS to DEVICE =
RCD4.SYS /V.





       Enhancements to the Iomega rcd Utilities

The latest versions of the Iomega RCD Utilities contain
enhancements to the RCD INSTALL and RCDTOOLS
utilities.




                   RCDINSTALL

The RCDINSTALL utility can now install multiple Iomega
device drivers in the CONFIG.SYS file and allows you to
specify a setting for the MSDOS verify function.




            Installing Multiple Drivers

If your utilities disk contains drivers for multiple
Iomega host adapter boards, RCD INSTALL will prompt you
to install all of the drivers in the CONFIG.SYS file. 
If you do not want all of the drivers installed, you
can tell RCDINSTALL no or edit the CONFIG.SYS file to
remove the unwanted drivers.
This feature allows you to use the same disk cartridge
to boot different computers containing different Iomega
host adapter boards.  If an Iomega device driver is not
located on the same disk as RCDINSTALL, that driver
will not be installed.  If you wish to install multiple
drivers on a disk cartridge, copy the appropriate
drivers to a copy of the utilities disk before starting
RCDINSTALL.  For the names of the various Iomega
device drivers refer to the Host Adapter Board Owner's
Manual that came with your Iomega host adapter board.





             The Verify Setting Option

RCDINSTALL allows you to select the setting for the
MSDOS VERIFY option.  The Bernoulli Box drives and
device driver follow the MSDOS VERIFY setting.  If
verify is on, the Bernoulli Box drives perform a verify
each time they read or write information on the disk. 
In addition to the verify, the 20Mb and 44Mb 5 inch
drives also automatically reallocate sectors should any
bad sectors be encountered as part of the verify
process.  (Refer to the Bernoulli Box Owner's Manual
and Host Adapter Board Owner's Manual that came with
your Bernoulli Box for more information.)
You can set the verify option from the RCDINSTALL menu
by changing the "Verify setting placed in AUTOEXEC.BAT"
option to On or by placing a /V on the command line. 
Setting the verify option causes RCDINSTALL to create
or modify an AUTOEXEC.BAT file on the target disk.  The
AUTOEXEC.BAT file will contain the following lines.

	VERIFY ON
	DATE
	TIME

If you require additional lines, you can either copy a
particular file to the target disk prior to running
RCDINSTALL, or add the lines to the file that
RCDINSTALL creates.
If an AUTOEXEC.BAT file already exists on the target
disk, RCDINSTALL backs up that file with an extension
of .BAK, then creates a new file by adding the lines
above to the existing file.  If an AUTOEXEC.BAT file
exists, the DATE and TIME commands are not added.





			RCDTOOLS

In this version of the Iomega RCD Utilities the
RCDTOOLS utility provides a scan function to aid in
diagnosing disk cartridge problems.  The scan function
provides three different methods of analyzing the disk
and returns information useful in recovering data from
damaged disks and for keeping track of the useful life
of a disk cartridge.  If a disk cartridge begins
producing read or write errors, the RCDTOOLS scan
function will help in identifying the causes and
remedies.
All Iomega disk cartridges are designed for long life
and trouble free operation.  The Iomega device driver
further enhances cartridge life by providing an
extended error recovery system for all Bernoulli Box
disk cartridges and an autoreallocation feature for
44Mb and 20Mb 5 inch disks.  RCDTOOLS takes advantage
of these features to help you track the life of your
disk cartridges and to keep the operation of your disk
cartridges trouble free.
  Data Integrity  None of the data on the disk
cartridge will be affected by the scan function
options. 
  Disk Cartridge Specifications  Disk cartridg 
specifications for cartridge life and reliability can
be found in the Bernoulli Box Owner's Manual for your
particular subsystem. 





   Using Cartridge Scan To Determine Cartridge Life

All Iomega disk cartridges have spare space that is
used during the Iomega format process to replace any
bad sectors that have developed on the disk with spare
sectors.  A bad sector is any sector on the disk that
the drive is unable to read from or write to.  The
replacement process is part of the "Surface verify"
option in the RCDFORMAT utility and is automatic when
Surface verify is enabled.  The replacement of bad
sectors with good sectors guarantees a disk that is
free from bad sectors.
The life of a disk cartridge is directly related to
this spare space.  As a disk cartridge goes through its
life, the spare sectors are used up each time the disk
is reformatted to replace bad sectors with good
sectors.  When all the spare sectors on a disk have
been used up, the disk will no longer format and should
be discarded.
The RCDTOOLS scan function provides a way to determine
the percentage of spare space remaining on the disk and
indirectly the life remaining for the cartridge.
Use the following procedure to determine the percentage
of spare space remaining on a disk cartridge.
	Start the RCDTOOLS utility by selecting it from
the RCD Utilities Main Menu or by typing RCD T at the
DOS prompt and pressing enter.
  Command Line Operation  The cartridge scan option can
be invoked from the DOS command line by placing a /C on
the RCDTOOLS command line. 
	Select the drive containing the disk cartridge you
wish to scan then press Pg Dn, select the Scan function
and press C to set it to Cartridge.  When all settings
have been made, press Enter to execute the scan.
The selected cartridge is scanned (the scan only takes
a few seconds) and information in the form of gages is
returned in the options window of the RCDTOOLS menu. 
For 8 inch drives a spare tracks gage is returned.  For
5 inch drives, a spare sectors gage is returned.  For
44Mb 5 inch drives, a second gage for reallocation
sectors is returned.  The information provided in the
two gages can be interpreted as follows.
	Spare Sectors/Tracks.  The spare sectors/tracks
 gage reports the percentage of spare space remaining
on the disk.  This percentage equates roughly with
cartridge life.  As the spare space is used during
format operations to replace bad sectors on the disk,
the gage moves toward 0%.  When a cartridge has less
than 25% of its spare space remaining it is nearing the
end of it's useful life.  To prolong its life a
cartridge can be used for archival purposes and not as
an active working disk.  This information is reported
by RCDTOOLS for all Iomega disk cartridges.
	Reallocation Sectors.  A reallocation sectors gage
is displayed for 44Mb 5 inch disks only.  Its
percentage equates roughly to the format life of the
disk cartridge.  When the MSDOS VERIFY option is
turned on, bad sectors encountered during the verify
process are automatically replaced with reallocation
sectors and the gage moves toward 0%.  When less than
25% of the reallocation sectors remain, the cartridge
should be reformatted.  By periodically checking a disk
cartridge with the RCDTOOLS cartridge scan, the disk
can be reformatted before any bad sectors can cause
errors or loss of data.  When the disk is reformatted,
the reallocated sectors and any bad sectors encountered
during the format are replaced with spare sectors.  The
gage for reallocation sectors will return to 100% and
the Spare Sectors gage will move downward.
  Command Line Operation  If the scan was invoked from
the DOS command line, the percentages shown in the menu
gages are reported as numbers. 
Using the cartridge scan periodically will help you to
manage your disk cartridges to get the most useful life
from them.  The cartridge scan can help determine the
status of a disk cartridge and tell you when problems
with a disk may be remedied by reformatting or
replacement.





		Using Surface Scan and File Scan

When a disk cartridge begins generating read or write
errors, the errors may be caused by bad sectors.  A bad
sector is a disk sector that the Iomega device driver
extended error correction cannot verify or replace with
a reallocation sector.  If a file is assigned a bad
sector, the part of the file in the bad sector cannot
be read and the file may be lost.  RCDTOOLS provides
two scan functions for determining which disk sectors
may be bad and which files, if any, are using bad
sectors.  This information is useful in deciding how to
back up the disk before reformatting it.
 A disk cartridge containing bad sectors should be
backed up before the disk is reformatted.  Do not
perform a sector-for-sector copy of the disk.  If no
files are currently assigned to bad sectors, make a
file-for-file copy of the disk.  If files are assigned
to bad sectors, perform a selective backup to back up
all good files before reformatting the disk.  Refer to
the RCD Utilities User's Manual and Reference Guide for
information on copying disk cartridges.  Some of the
files assigned bad sectors may be recovered using other
third party utilities.

Use the following procedure to scan a disk cartridge
for bad sectors.
	Start the RCDTOOLS utility by selecting it from
the RCD Utilities Main Menu or by typing RCD T at the
DOS prompt and pressing enter.
  Command Line Operation  The cartridge scan option can
be invoked from the DOS command line by placing a /S or
/F on the RCDTOOLS command line.
	Select the drive containing the disk cartridge you
wish to scan then press Pg Dn, select the Scan function
and press S to set it to Surface or press F to set it
to File.  When all settings have been made, press Enter
to execute the scan.
The selected cartridge is scanned.  The two settings
return the following information.
	Surface.  The surface setting scans the disk for
bad sectors.  Any bad sectors that are found during the
scan are reported by number in the menu status window.
	File.  The file setting scans the disk for files
using bad sectors.  Any file found that is using a bad
ector on the disk is reported by name in the menu
status window.
  Command Line Operation  If the scan was invoked from
the DOS command line, the information reported in the
menu status window is reported to the screen. 
If bad sectors are found during a disk scan, re-scan
the disk cartridge using the file scan to determine if
any files are assigned to bad sectors.  If the disk
cartridge has spare space available it can be
reformatted to replace the bad sectors with good
sectors.
Caution  The format process erases all files on the
disk.  Be sure to back up the files on the disk before
reformatting it. 


For more information on the use and operation of Iomega
RCD Utilities, refer to the RCD Utilities User's Manual
and Reference Guide.
