LAN Manager 2.1 / OS/2 1.31 with 2 Adaptec
AHA1640 cards in FTs and FTe
In LAN Manager Newsletter - Issue 2, published on 3rd June 1991, we
documented the recommended settings for FT servers with two Adaptec SCSI controller cards
that are being set up for disk duplexing under LAN Manager 2.00b (and OS/2 1.21).
With the release of LAN Manager 2.1 and OS/2 1.31, these recommended
settings need to be altered. When booting from the OS/2 1.31 install disk, OS/2 1.31 will
install onto the first disk attached to the Adaptec controller card located at base I/O
address 330h, but when booting from the hard disk, OS/2 1.31 will try to load the
operating system from the first hard disk attached to the Adaptec card in the highest
numbered MCA slot.
This means that if a server is configured as per LAN Manager Newsletter
Issue 2, and OS/2 1.31 is loaded onto it, the server will NOT boot from the hard disk.
Also, if disk duplexing is configured, the primary partition for the mirrored pair will be
located on the disk attached to the Adaptec card in the highest numbered MCA slot (which
by default will be the disk mounted in the rear drive bay of a VX FT/FTs).
In order to correctly configure an FT server (VX FT, FTs or FTe) for
OS/2 1.31 when two Adaptec controller cards are fitted, you should set the system up as
follows...
| For VX FT servers (FT mark 1), or FTs servers (FT
mark 2) |
| Slot 1(Mk1): AHA-1640 SCSI Host Adapter (Attached to the
drive(s) in the REAR BAY) |
| or Slot 7(Mk2): |
|
Adapter BIOS |
BIOS Disabled |
|
I/O Port Address |
334h |
|
Arbitration Level |
Level_7 |
|
Interrupt Level |
IRQ_15 |
| Slot 2(Mk1): AHA-1640 SCSI Host Adapter (Attached to the
drive(s) in the FRONT BAY)or Slot 8(Mk2): |
|
Adapter BIOS |
DC000h |
The first disk on this controller |
|
I/O Port Address |
330h |
will be the OS/2 boot disk. |
|
Arbitration Level |
Level_6 |
|
Interrupt Level |
IRQ_14 |
| For FTe servers |
| Slot 2: AHA-1640 SCSI Host Adapter - (Attached to the
drive(s) to be the SECONDARY disk(s)) |
|
Adapter BIOS |
BIOS Disabled |
|
I/O Port Address |
334h |
|
Arbitration Level |
Level_7 |
|
Interrupt Level |
IRQ_15 |
| Slot 3: AHA-1640 SCSI Host Adapter - (Attached to the
drive(s) to be the PRIMARY disk(s)) |
|
Adapter BIOS |
DC000h |
The first disk on this controller |
|
I/O Port Address |
330h |
will be the OS/2 boot disk. |
|
Arbitration Level |
Level_6 |
|
Interrupt Level |
IRQ_14 |
----------oOo---------- |
