Avago Technologies LSI20160 User Manual
Page 84
4-16
Windows NT 4.0 Device Driver Installation
Copyright © 1993–2001 by LSI Logic Corporation. All rights reserved.
multi(0) and disk(0) should always remain the same, and
X
= the drive number of the mirrored partition in the INT13h
chain minus 80h.
The drive number of the mirrored partition can be found during
system bootup of the SDMS 4.XX SCSI BIOS when the primary
partition does not exist. It should say either BOOT (= 80h), 81h,
82h, and higher. Therefore, the value of
X
would be 0 when
BOOT, 1 when 81h, 2 when 82h, etc.
Y
= the partition number on the drive (starts at 1 which equals
single partition on the drive)
The next example provides a scenario to better illustrate the
above information.
Example: Two LSI Logic 8XX host adapters are in the system.
The first host adapter, #0 which is the boot path, has two SCSI
hard drives on ID 0 and ID 5. The second host adapter, #1, has
two SCSI hard drives on ID 2 and ID 4. Assuming that the SCSI
bus scan starts from ID 0 and goes up, the drive number of
INT13h will look like this:
Host Adapter #0, ID 0 = BOOT (which is 80h)
Host Adapter #0, ID 5 = 81h
Host Adapter #1, ID 2 = 82h
Host Adapter #1, ID 4 = 83h
Now Windows NT is installed on the boot drive, host adapter
#0 ID 0, and a mirrored partition is established on host adapter
#1 ID 2. If the primary partition fails, for example due to power
failure, then the drive number of INT13h will change:
Host Adapter #0, ID 5 = BOOT (which is 80h)
Host Adapter #1, ID 2 = 81h
Host Adapter #1, ID 4 = 82h
Therefore, to boot from the mirrored partition, enter this line in
the
BOOT.INI
file on the NT FT boot floppy:
MULTI(0)DISK(0)RDISK(1)PARTITION(1)\ where the host adapter is #1 with ID 2. Note that RDISK(1) was calculated from x = 81h − 80h.