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ASUS P2B-D2 User’s Manual 113
IBM OS/2
• On some PCI systems, users may sometimes have problems loading the driver
when the host adapter board is seated in a particular slot. Moving the host adapter
board to another slot may solve the problem. If the problem still persists, it may
be occurring because the Adaptec 7800 Family Manager Set v3.00 driver is
unable to access the PCI hardware registers directly. To overcome this, users
should use the /!PCIHW switch. Modify the CONFIG.SYS file to include the
following line:
a. For Ultra2SCSI host adapters:
BASEDEV=AIC78U2.ADD /!PCIHW
b. For UltraSCSI or earlier host adapters:
BASEDEV=AIC7870.ADD /!PCIHW
• There are no switches for controlling OS2ASPI.DMD directly. IBM did not
define them in their specification and we cannot be sure that other host adapters
will have the same switches.
• OS2SCSI.DMD will only allocate devices when a device driver requests it, but
this will prevent OS2ASPI from accessing it. There is nothing in the ASPI speci-
fication regarding device allocation so OS2ASPI must rely on other managers to
fairly share targets. This should only be a problem if you have two drivers that
use different managers and you want them both to access the same target at the
same time.
• Do NOT disable DASD manager access to target 0 if you are booting from your
SCSI host adapter. This will prevent the system from booting!
• Fault Tolerance is supported in the driver. However, ABORT and SCSI BUS
RESET will only work for targets that are properly behaved.
• IBM does not support installing the operating system onto magneto optical
devices.Additionally, OPTICAL.SYS (IBM OS/2 V3.0) or OPTICAL.DMD
(IBM OS/2 V4.0) allows magneto optical devices to be supported as though
they were large floppy devices.LOCKDRV.FLT allows removable media such
as MO's to be supported as though they were fixed hard drives.
• It is not possible to install IBM OS/2 3.0 on drives with capacity greater than 8
GB, nor in a partition greater than 4 GB.Contact IBM support for the appropri-
ate fixes.
IBM OS/2
B. AIC-7890 Driver