STACKER NOTE                                                    STACKER NOTE                            STACKER NOTE

STAC FAX Index #2506 - 6/18/92


		    Configuring a CD-ROM on a Stacked System
			(Applies to Stacker 1.x, 2.x, and 3.0)


Background
During system startup, Stacker drives are assigned a drive letter by DOS as 
they are "mounted" by the Stacker device driver in Config.sys. CD-ROM drives 
are not assigned a drive letter until MSCDEX.exe loads in the Autoexec.bat 
file. Because Stacker drive letters are assigned first, the CD-ROM will have 
to take the next available letter. This means that if your CD-ROM existed 
before Stacker, you will probably have to re-configure it to use a new drive 
letter.

Configuring the CD-ROM.

	1. CONFIG.SYS - Here are is a sample Config.sys. It is recommended that 
	   the CD-ROM device be loaded after SSWAP.COM as shown.
		
		DEVICE=C:\DOS\SETVER.EXE  (this is required if running under DOS 5.0)
		DEVICE=C:\STACKER\STACKER.COM  C:\STACVOL.DSK .....etc.
		DEVICE=C:\STACKER\SSWAP.COM C:\STACVOL.DSK /SYNC
		DEVICE=SONYCDU.SYS or DEVICE=PCD650S.SYS   [/D:name /B:xxx /M:mode]

	2. AUTOEXEC.BAT The CD-ROM letter is assigned here with the /L: parameter 
	   on the MSCDEX  command line. Take note of the Stacker drive letter 
	   assignments at boot time. For example, to determine which drive letters 
	   Stacker has been given, type:

		 C:\STACKER\STACKER      <ENTER>
	
	The output will look similar to: 

		 STACKER - 2.00, (c) 1990-91, Stac Electronics, Carlsbad, CA
		 Drive C: was drive D: at boot time   [ D:\STACVOL.DSK ]
		 Drive D: was drive C: at boot time  

	Set the CD-ROM to the next available drive letter. In this example, drive 
	E: is available for the CD-ROM. In Autoexec.bat you would assign drive E: 
	on the MSCDEX command line,

		MSCDEX /D:name /M:x /V /L:letter /E 
		Change /L:Letter to /L:E
		MSCDEX /D:name /M:x /V  /L:E  /E 

	After changing the CD-ROM drive letter, it may be necessary to re-setup 
	applications or programs to recognize the new drive letter designation.

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Copyright 1993, Stac Electronics
