FM: PROMISE TECHNICAL SUPPORT
RE: OS/2 WARP 3.0 Installation
Models:  DC4030VL/VL-1/VL-2; DC420; DC200


Promise Caching controllers will not run with the default OS/2 v3.0 Warp 
driver - IBM1s506.ADD driver.  Some additional driver switches can be 
added to the OS/2 CONFIG.SYS or our PROMISE OS/2 driver can be substituted.

The switch "SMS" or Set Multiple Support, or ATA Multiple Mode, is not 
compatible with the Promise Caching controllers.  The new OS/2 v3.0
(unlike OS/2 v2.x) has enabled this switch as default. To disable SMS, 
these drivers switches can be added to the CONFIG.SYS.

Example -       Disable SMS on two IDE HDs installed on the Primary 
		controller; In the OS/2 CONFIG.SYS, change the line with 
		the IBM1S506.ADD driver
										
	BASEDEV=IBM1s506.ADD /A:0 /U:0 /!SMS /U:1 /!SMS

Below is a partial list of  the available switches for this driver.  You 
may also choose type "HELP IBM1s506.ADD" from OS/2 for complete information.

     /V       Verbose Mode - displays controller status when driver loads
     /A:0     Adapter number - "0" for Primary controller; "1" for Secondary 
     /I       Ignore adapter
     /U:0     Unit on adapter (adapter defined with /A); 0-Master 1-Slave     
     /!SMS    Disable SMS support
     /SMS     Enable SMS support


The Promise OS/2 driver "PTI1s506.ADD" driver can be installed which 
supports a Promise proprietary SMS Multiple mode which loads automatically.  
Be sure to download the latest OS/2 driver v1.41 from our BBS - 
"OS2_141.ZIP".  

To install Warp 3.0 with PTI1s506.ADD:
Make a working diskcopy of the second installation disk to be used for 
this installation.  On the copy of the second disk, delete IBM1s506.ADD 
from the floppy. With a system editor, edit the CONFIG.SYS on the second 
floppy changing the line "BASEDEV=IBM1s506.ADD" to 
																															  
	BASEDEV=PTI1s506.ADD

Begin the standard OS/2 Warp install with original first disk and the 
working copy of the second disk.


To change an existing Warp 3.0 install:
Boot to an OS/2 floppy.  Copy the PTI1s506.ADD driver into the OS2 directory.  
In the OS/2 CONFIG.SYS find and change the line BASEDEV=IBM1s506.ADD to:
											
	BASEDEV=PTI1S506.ADD

Either the addition of switches to the IBM1s506.ADD driver or the Promise 
PTI1s506.ADD OS/2 driver will work.  The Promise driver will give the 
additional benefits of Multiple Mode support and 4 IDE HD support.