IBM OS/2
General Unit Parameters:
•/I -- Ignore the specified adapter. This allows another driver to share the adapters that the ADD would normally use.
•/DM -- Enable DASD manager support (DEFAULT). This parameter allows OS2DASD.DMD to control the specified target(s) if they are identified as DASD (hard disk) devices.
•/!DM -- Disable DASD manager support. This parameter prevents OS2DASD.DMD from controlling the specified target(s).
•/SM -- Enable SCSI manager support (DEFAULT). This parameter allows OS2SCSI.DMD to control the specified target(s) if they are identified as NON- DASD SCSI devices. All SCSI hard drives will be controlled by OS2DASD.DMD.
•/!SM -- Disable SCSI manager support. This parameter prevents OS2SCSI.DMD from controlling the specified target(s).
•/TAG -- Specifies the maximum number of tagged commands for all target de- vices on the host adapter (1-16).A value of 1 disables tagged queuing.The maxi- mum number allowed is 16.(The default is 8.)
•/UR -- Enables reporting of under runs (DEFAULT).
•/!UR -- Disables reporting of under runs.
Configuration Examples:
Example 1:
Suppose that you had a removable hard drive as target 3 and you wanted to control the hard drive with an ASPI application and driver. Normally OS2DASD will allocate this device, treat it as a large floppy and prevent you from sending any SCSI commands via ASPI.
The following command line will prevent OS2DASD.DMD from accessing the target and still allow OS2SCSI.DMD and OS2ASPI.DMD to share access to it.
BASEDEV=AIC78U2.ADD /A:0 /!DM:3
Example 2:
Suppose that you had a multi-disk CD-ROM as target 4 on host adapter 0 and two DASD devices as targets 1 and 5 on host adapter 1. The following command line will prevent OS2SCSI.DMD from accessing the CD-ROM and prevent OS2DASD.DMD from controlling the DASD devices. The driver will also search for multiple LUNs on all host adapters.
BASEDEV=AIC7870.ADD /ET /A:0 /!SM:4 /A:1 /!DM:1,5
