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- Adaptec drivers
-
- If you are having problems with the current ADD used by your host adapter
- and OS/2 2.0. You may want to try the newer version included here. Please
- keep a copy of the older version in case you want to return to it later.
-
- The 1540A was NOT properly supported by previous versions of the AHA154x.ADD.
- Please try the new version if you have an A board. You may want to remove
- the line for IBMINT13.I13 from your CONFIG.SYS to verify that the ADD is
- being loaded correctly. If you then get a message about COUNTRY.SYS not found
- it is very likely that the ADD is NOT being loaded.
-
-
- Command line switches for Adaptec drivers and OS/2 2.0
-
- OS/2 adapter device drivers (.ADD files) are normally installed automatically and require
- no further information from the user. However, in certain situations the user
- may wish to modify the behavior of the driver to meet their specific needs.
-
- The following examples will all use the driver for the Adaptec 1542B, but the
- driver for any other Adaptec host adapter can be used instead.
-
- The standard format for command line switches is :
- BASEDEV=AHA154X.ADD [Adapter ID] [Unit Parameter] {: [SCSI Target ID]}
-
- [Adapter ID] - /A:n, where n is the number (zero relative) of the adapter
- installed in the system. The adapter ID is determined when the driver is
- loaded based on the order that adapters are found in the system. Please refer
- to the section on each host adapter to determine the scanning order.
-
- [Unit Parameter] - The modification being made to the behavior of the
- selected host adapter
-
- [SCSI Target ID] - The targets to which the Unit Parameter will be applied.
- This parameter may be and single ID (d) or list of IDs (d,d,d).
-
- General Unit Parameters
-
- /ET - Allow embedded targets. This parameter indicates that the ADD
- should assume that all targets have more than one logical unit (LUN)
- defined.
-
- /!ET - Do not allow embedded targets (DEFAULT). This parameter
- indicates that the ADD should assume that all targets have only one
- logical unit (LUN) defined.
-
- /DM - Enable DASD manager support (DEFAULT). This parameter allows
- OS2DASD.DMD to control the specified target(s) if they are identified
- as DASD 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).
-
- Please note that there are no switches for controlling OS2ASPI.DMD
- directly. This is because it was not defined in IBM's specification
- and we cannot be sure that other host adapters will have the same
- switches. Since OS2ASPI.DMD shares devices (unlike OS2DASD.DMD) this
- should not be much of an inconvenience.
-
- 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.
-
- BASEDEV=AHA154X.ADD /A:0 /!DM:3 will prevent OS2DASD.DMD from
- accessing the target and still allow OS2SCSI.DMD and OS2ASPI.DMD to
- share access to it.
-
- Example 2
- Suppose that you had a CD-ROM as target 4 on host adapter 0 and two
- DASD devices as targets 1 and 5 on host adapter 1.
-
- BASEDEV=AHA154X.ADD /A:0 /!SM:4 /A:1 /ET /!DM:1,5 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 host adapter 1.
-
- Driver Specific Information
-
- AHA152X.ADD
- This driver can support two host adapters and searches for them at ports 340H
- and 140H; boards are assigned adapter numbers in the order they are found.
-
- AHA154X.ADD
- This driver can support four host adapters, distributed among six possible
- port addresses. The port addresses are scanned in the order 330H, 334H,
- 230H, 234H, 130H, 134H; boards are assigned adapter numbers in the order they
- are found.
-
- Special Unit Parameters (07/31/92 and later )
-
- /BON:t - allows the bus-on time to be set to a value between 2 and 15
- microseconds. The default value for OS/2 2.0 is 7 microseconds and this value
- should be used for most systems.
-
-
-
- AHA164X.ADD
- This driver can support host adapters installed in any 16-bit MCA slot. The
- slots are scanned from lowest to highest and boards are assigned adapter
- numbers in the order they are found.
-
- AHA174X.ADD
- This driver can support host adapters installed in any EISA slot. The slots
- are scanned from lowest to highest and boards are assigned adapter numbers
- in the order they are found.
-
-
-