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- Path: sparky!uunet!gatech!destroyer!mudos!mudos!not-for-mail
- From: mju@mudos.ann-arbor.mi.us (Marc Unangst)
- Newsgroups: comp.unix.pc-clone.32bit
- Subject: Re: AAA: Archive, Adaptec, AARRRGH!
- Date: 25 Jan 1993 02:44:24 -0500
- Organization: The Programmers' Pit Stop, Ann Arbor MI
- Lines: 56
- Message-ID: <1k05ooINNs3i@mudos.ann-arbor.mi.us>
- References: <C1DpA5.GDv@athena.cs.uga.edu>
- NNTP-Posting-Host: mudos.ann-arbor.mi.us
-
- In article <C1DpA5.GDv@athena.cs.uga.edu> fuller@athena.cs.uga.edu (James P. H. Fuller) writes:
- > 1) First off, the SCSI card (Adaptec AHA-1542B) jumper settings:
- > 1 2 3 4 5 6 7 8 9 1 1 1 1 * Pairs 4 and 5 jumpered, 6 not:
- > 0 1 2 3 (SCSI Address ID = 4)
-
- Here is your first problem. SCSI ID numbers *cannot* be duplicated on
- the bus; in this case you have both your host adapter and your tape
- drive set to ID 4. There's no reason to change the host adapter from
- the stock setting of ID 7, usually.
-
- > * Pair 12 jumpered, pair 13 not:
- > (DMA transfer speed = 5.7mb/sec)
-
- This may or may not cause problems. You should probably start with
- the DMA speed set to 5MB/sec; your tape drive certainly is going to be
- the bottleneck here, not the ISA bus transfer rate of the controller.
-
- > --------- (On-card BIOS enabled; tried both
- > o o o o o enabled and not enabled)
- [...]
- > 1 2 3 4 5 6 7 8 * Pairs 2, 3, and 4 not jumpered:
- > --------------- (AT I/O port = 334H) (* see below)
-
- Well, here's the next problem. If you change the I/O address of the
- host adapter (as you have done), then you need to disable the on-card
- BIOS, since it expects the controller to be at I/O address 0x330.
- Since you don't need to boot from a hard drive connected to the 1542,
- I'd just leave the BIOS disabled and skip the 1-2 minute wait on
- bootup while the BIOS probes the SCSI bus for hard drives.
-
- > 3) Tape drive (Archive 2150s) jumpers:
-
- These look fine.
-
- > the pin 1 end of the connector. The connector at the tape drive has
- > no indication which is pin 1; presently the red edge of the cable is
- > right next to the jumper array but this was a random guess and I've
- > got a 50% chance of getting it wrong. Whatever happened to keyways
- > and other forms of idiotproofing?
-
- Well, *my* 2150S has a keyed SCSI connector. In any case, pin 1
- should be to your right as you look down from the top of the drive.
-
- >I did try to check out the hardware under DOS with DEBUG and the on-card
- >test routines (-g=dc00:9). The diagnostic introductory message comes up, and
-
- You probably don't want to use the tests at DC00:9. You'd be better
- off using the routines at DC00:6, which will display a listing of
- everything found on the SCSI bus.
-
-
- --
- Marc Unangst, N8VRH | "Of course, in order to understand this you
- mju@mudos.ann-arbor.mi.us | have to remember that the nucleus of the atom
- | is squishy."
- | -W. Scheider, from a Physics lecture
-