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SCSITIP.005
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1992-12-15
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Tech Tip
Product: Series 15/Series 44
Tech Tip #: SCSI.005
Originator: Peter Jarrett
Date: June 1992
Subject: IBM Operating System 2, Version 2.0 "AHA154X.ADD"
Command Line Options
USEFUL HINTS
If you are using targets that might be allocated to another device manager
(i.e. magneto-optical drives to OS2DASD or CD-ROM to OS2SCSI) you must
make the ADD refuses to allocate the appropriate targets to other device
managers. Here is an example :
BASEDEV=AHA154X.ADD /A:0 /!DM:3,4 /!SM:5
The same command line switches are to be used with the other .ADDs
commands.
This tells the ADD the on adapter 0 targets 3 and 4 cannot be given to the
DASD manager and target 5 cannot be given to the SCSI manager. There are
no limits to the number of targets this can be done to and be careful not
to prevent the DASD manager from using the boot target or the system will
hang.
Multiple controllers can be used with or without the "/A:" option if all
attached devices are to be controlled by both the SCSI and DASD Manager.
The AHA154X.ADD (later than 03-30-92) driver file has the following
changes:
Hard drives larger than 1 GB are now supported. Partitions do not have any
size limitation, EXCEPT the boot partition is limited to one gigabyte. It
is much better to use HPFS on large partitions: you will get faster access
to your data and space will be used much more efficiently.