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.

B. AIC-7890 Driver

IBM OS/2

ASUS P2B-D2 User’s Manual

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