Here is the latest release driver for Adaptec 6260/1510/1520/1522 host adapters and OS/2 2.X. AHA152X.ADD 36827 8-23-93 2:00am Command line switches for Adaptec drivers and OS/2 2.X 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. ***** IMPORTANT ***** Please proceed cautiously with the following information. If you have purchased software which requires you to use switches, it should include instructions on how to use them. Most software requires no switches and you do not need to concern yourself with the information about switch settings. The following examples will all use the driver for the Adaptec 1542 family, but the driver for any other Adaptec host adapter can be used instead. The standard format for command line switches is : BASEDEV=AHA154X.ADD [Universal Parameter] [Adapter ID] [Unit Parameter] {: [SCSI Target ID]} [Universal Parameter] - An option that applies to all adapters controlled by the driver. [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). Universal 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. /V - Load driver verbosely. This parameter will display the driver name as well as the version number and Adaptec copyright if the driver loads successfully. Information on all targets found in the system will also be displayed. This switch is only valid in drivers dated 11/24/92 and later. General Unit Parameters /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). 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 /ET /A:0 /!SM:4 /A:1 /!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 all host adapters. Important Tips 1)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. 2) OS2SCSI.DMD will only allocate devices when a device drivers requests it, but this will prevent OS2ASPI from accessing it. There is nothing in the ASPI specification 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. 3) Do NOT disable DASD manaager access to target 0 if you are booting from your SCSI host adapter. This will prevent the system from booting. 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. Universal parameters /SN - Allow synchronous negotiation (DEFAULT) /!SN - Prevent synchronous negotiation Special Unit Parameters /D - Allow targets to disconnect from the SCSI bus (DEFAULT). /!D - Prevent targets from disconnecting from the SCSI bus. /H:x - Specifies the host adapter SCSI ID. A number from 0-7 replaces x. The default ID is 7. If you specify an invalid number, the default is used. /Y - Enable parity checking on the SCSI bus (DEFAULT). /!Y - Disable parity checking on the SCSI bus. 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 (09/19/92 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. /BOFF:t - This command sets the time that host adapter will spend off the bus during a data transfer. The default is 4 microseconds and it is adjustable from 1 to 64 microseconds. /D - Allow targets to disconnect from the SCSI bus (DEFAULT). /!D - Prevent targets from disconnecting from the SCSI bus. *** This command is not supported on boards earlier than revision B. 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. The slots are scanned twice, the first scan will find all boards with their BIOS enabled and the second will find those with their BIOS disabled. AHA174X.ADD This driver can support host adapters installed in any EISA slot. Adapter numbers are first assigned to boards with their BIOS enabled; the numbers are assigned from lowest BIOS address to highest address. Any remaining boards are assigned adapter numbers by scanning the slots from lowest to highest and boards are assigned adapter numbers in the order they are found.