[3075] in linux-scsi channel archive
Linux AHA-2940AU & Zip Plus problem (2.1.78)
daemon@ATHENA.MIT.EDU (Prischl Roman)
Tue Jan 13 07:30:59 1998
Date: Tue, 13 Jan 1998 13:24:06 +0100
To: linux-scsi@vger.rutgers.edu
From: Prischl Roman <roman@freebee.tu-graz.ac.at>
Hello!
It seems that I got troubles with the 2.1.78 Linux-Kernel.
Everything starts to load right....
When I try to copy some file(s) (actually more MBytes) after a few seconds
there are messages which tell
"(scsi0:5:0) Underflow - Wanted at least xxxxx, got yyyyy, residual SG
count 1"
and
"(scsi0:5:0) Data Overrun of xxxxx bytes detected in Data-Out phase, tag 0;
forcing a retry"
This happens a few times and then the scsi-system stops working. Both LEDs
(Zip & Hostadapter) keep ON (not flickering as under normal transfers) and
there's no further transfer.
The only way to get out of this situation is to do a hardreset.
I tried every option (Linux: QueueTagging ON/OFF, SCB ON/OFF, AHA-2940AU
BIOS: Enable/Disable Disconnect) I saw....
Under Linux 2.0.32 there are no problems with this configuration (as there
aren't in Win95 *shame* too...).
My hardware is
i586
AHA-2940AU (Only extern devices, therefore manual termination enabled)
HP Scanjet 4p
Iomega Zip Plus Drive
I compiled the 2.1.78 kernel with scsi-core in kernel and sd_mod,sg and
aic7xxx as modules (kerneld).
Thankx for your hints...
Roman
