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SubjectRe: adaptec 2940UW

On Tue, 29 Apr 1997, Jeff Langley wrote:

> I was wondering if anyone could tell me if the current kernel have support
> for The adaptec 2940 UW and if so when was the first kernel that did.

I was using it with 2.0.27 and 2.0.30 on a dual Intel Pentium 200. But it had
worked only whan the kernel was compilled without SMP. In the SMP-enabled
2.0.30 kernel the driver crashes, (goes into endless loop od resetting the
SCSI and doing something just after:
VFS: Mounted root (ext2 filesystem) readonly.
OR does not detect one disk OR works on the next boot (I was afraid to try

_But_ I had no problems at all with the patch, which was mentioned here

---------- Forwarded message ----------
From: Hubert Mantel <>
To: Linux Kernel Mailing List <>
Date: Thu, 27 Mar 1997 10:57:02 +0100 (MET)
Subject: Patch for AHA2940AU


this patch helps with problems when using an AHA2940AU:

--- aic7xxx.c.old
+++ aic7xxx.c
@@ -4814,7 +4814,9 @@
case AIC_7850:
case AIC_7855:
case AIC_7860:
- case AIC_7861:
+#if 0
+ case AIC_7861: /* AHA-2940AU */
config.bios = AIC_DISABLED;
config.flags |= USE_DEFAULTS;
config.bus_speed = DFTHRSH_100;
The problem and the solution have been discovered by Peter Pointner. He
reported it to the Maintainer of the driver. Maybe this patchlet should
make it into 2.0.30, as 2.0.29 is still missing it...

It did not make it into 2.0.30 ...

The configuration of my machine is on

BTW. Is it possible to use Ultra (SCSI-3) and normal SCSI-2 devices on a
single cable ? It seems to me, that my CD-ROM slows down my SCSI bus.

Tomasz Motylewski

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