Tekram Technology DC-820B - Manual (Page 34)

EISA Fast SCSI Caching Adapter
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drives) reserved with the driver within 16. This option is important for
removable media devices. If you do not reserve enough logical drives for
your removable media, it may cause some of the logical drives to go unrecog-
nized. To install, add a line after ASPI driver in the CONFIG.SYS:
device=c:\aspi\aspibme.sys
—> device=c:\aspi\diskdrv.sys /d n1 n2 n3 ... n8
n1 logical drives are reserved for 1st physical drive
n2 logical drives are reserved for 2nd physical drive
n3 logical drives are reserved for 3rd physical drive
....
n nx: x = 1 .. 8 and the value of nx ranges from 0 to 9
n nx=0: DC-820B scans the number of logical drives automatically
n the ordering of physical drives starts from primary to secondary and
SCSI ID from 0 to 7
It is recommended that DOS 4.x or DOS 5.0 be used. For DOS 3.x, logical
drive capacity is limited to 32M bytes or less.
Logical drive scanning sequence
The scanning sequence of SCSI devices that DISKDRV.SYS follows is
starting from adapter #0, SCSI ID = 0, primary partition, and then extended
partition. Also refer to the I/O port definition for more scanning details.
The following is an example of the scanning sequence with two DC-820Bs.
The first one (adapter 0) controls two floppy drives, two BIOS INT 13H
controlled SCSI HDDs, one MO device with three logical partitions (drives),
and one SCSI HDD. The second one (adapter 1) controls one SCSI HDD
with one logical partition, that also is the primary partition. The commands
in the CONFIG.SYS would be like this:
device=c:\aspi\aspibme.sys
-> device=c:\aspi\diskdrv.sys /d 3 0 0