[7776] in linux-scsi channel archive
Convincing the aic7xxx driver that it's scsi1
daemon@ATHENA.MIT.EDU (ken@seefried.com)
Fri Dec 31 17:10:02 1999
To: linux-scsi@vger.rutgers.edu
From: ken@seefried.com
Date: Fri, 31 Dec 1999 17:03:42 -0500
Message-ID: <OF5E12B73F.38D9E966-ON05256858.00793069@seefried.com>
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<P>I've been pounding my head against this for quite a while, and I've draw=
n a blank. I've read every relevant HOWTO I can think of as well as t=
he driver sources. Clearly, I'm missing something.</P><P>I've got a C=
ompaq DeskPro XL 5133 (P200MMX, EISA/PCI thingy). It's got a built-in=
AM53C974 SCSI chip (actually, the SCSI/ENet combined chip). This con=
trols 2 disks and the CD-ROM. One of the disks is esp. important beca=
use it has the EISA config utils on it, and it needs to be drive 80h (C:, o=
r whatever). Runs Linux like a champ.</P><P>Now...I add an Adaptec AH=
A-2744W (EISA-based wide diff SCSI, recognized by the aic7xxx driver). &nbs=
p;I want this card to be the second controller. The drive connected t=
o this controller is correctly recognized by the Compaq BIOS as disk 82h. &=
nbsp;</P><P>Load linux.</P><P>I cannot for the *life* of me figure out how =
to coerce the damn Adaptec card to be SCSI1, not SCSI0. No matter wha=
t I do, the aic7xxx driver gets loaded before the AMD driver, rendering the=
machine unbootable (because what should be /dev/sda is now /dev/sdb). &nbs=
p;I've tried every BIOS & EISA setting under the sun. The AMD is =
set in the EISA config to be the first controller. I've put driver di=
rectives on the boot string trying to get the kernel to recognize the AMD c=
hip first without luck. I've moved the SCSI controllers to every IRQ/=
mem combo possible. I've edited the builtin=5Fscsi=5Fhosts array host=
s.c to move the Adaptec detection directive after the AMD and get a kernel =
detects them in the order I want and then promptly that panics (streaming t=
oo much rubbish out for me to transcribe the relevant messages). Even=
the rescue disk has let me down.</P><P>I assume that this has something to=
do with the fact that the Compaq XL BIOS32 is in a funky location and the =
kernel isn't getting the clue about which controller should be first.</P><P=
>Anyone have an idea?</P><P>- Ken</P><P></P>=
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