aacraid problems on PE2650 running 2.4.20

Hi,

We've been experiencing problems with one of our PowerEdge 2650
servers. We use Debian 3.0 (latest stable set of packages + security
updates). The same problem has occurred with 2.4.18 and 2.4.20, and has
persisted even after a Dell engineer replaced the SCSI backplane and one
of the drives.

We see errors like this on the system console:

^M\n-- 2:ford -- time-stamp -- 2003-03-18 22:50:39 (Mar/18/03) --\n\n--
2:ford -- time-stamp -- 2003-03-19 19:28:26 (Mar/19/03)
--\naacraid:ID(0:04:0) Timeout det
ected on cmd[0x28]
^Maacraid:SCSI Channel[0]: Timeout Detected On 227 Command(s)
^M\n-- 2:ford -- time-stamp -- 2003-03-19 19:28:31 (Mar/19/03) --\n\n--
2:ford -- time-stamp -- 2003-03-19 19:28:36 (Mar/19/03) --\naacraid:SCSI
Channel[0]: Timeo
ut Detected On 207 Command(s)
^M\n-- 2:ford -- time-stamp -- 2003-03-19 19:28:41 (Mar/19/03) --\n\n--
2:ford -- time-stamp -- 2003-03-19 19:28:46 (Mar/19/03) --\naacraid:SCSI
Channel[0]: Timeo
ut Detected On 221 Command(s)
^M\n-- 2:ford -- time-stamp -- 2003-03-19 19:28:51 (Mar/19/03) --\n\n--
2:ford -- time-stamp -- 2003-03-19 19:28:56 (Mar/19/03)
--\naacraid:ID(0:04:0) Timeout det
ected on cmd[0x2a]
^Maacraid:SCSI Channel[0]: Timeout Detected On 231 Command(s)
^M\n-- 2:ford -- time-stamp -- 2003-03-19 19:29:01 (Mar/19/03) --\n\n--
2:ford -- time-stamp -- 2003-03-19 19:29:06 (Mar/19/03) --\naacraid:SCSI
Channel[0]: Timeo
ut Detected On 239 Command(s)
^M\n-- 2:ford -- time-stamp -- 2003-03-19 19:29:11 (Mar/19/03) --\n\n--
2:ford -- time-stamp -- 2003-03-19 19:29:16 (Mar/19/03) --\naacraid:SCSI
Channel[0]: Timeo
ut Detected On 220 Command(s)
^M\n-- 2:ford -- time-stamp -- 2003-03-19 19:29:21 (Mar/19/03) --\n\n--
2:ford -- time-stamp -- 2003-03-19 19:29:26 (Mar/19/03) --\naacraid:SCSI
Channel[0]: Timeo
ut Detected On 231 Command(s)
^M\n-- 2:ford -- time-stamp -- 2003-03-19 19:29:31 (Mar/19/03) --\n\n--
2:ford -- time-stamp -- 2003-03-19 19:29:36 (Mar/19/03) --\naacraid:SCSI
Channel[0]: Timeo
ut Detected On 216 Command(s)
^M\n-- 2:ford -- time-stamp -- 2003-03-19 19:29:41 (Mar/19/03)
--\naacraid:SCSI Channel[0]: Timeout Detected On 213 Command(s)
^M\n-- 2:ford -- time-stamp -- 2003-03-19 19:29:50 (Mar/19/03)
--\naacraid: Host adapter reset request. SCSI hang ?
^Maacraid:SCSI Channel[0]: Timeout Detected On 225 Command(s)
^M\n-- 2:ford -- time-stamp -- 2003-03-19 19:30:00 (Mar/19/03)
--\naacraid: Host adapter reset request. SCSI hang ?
^Maacraid:ID(0:04:0) Timeout detected on cmd[0x2a]

The machine usually operates fine for a period of days or weeks, then
errors like this start to build up until the machine finally locks up.

It's running a MySQL database and there's a large amount of disk access,
both read and write.

Does anyone have a solution to this? Does it seem like a problem with the
driver, the RAID card, the disk, or what?


____________________________________
Adam Newby
IT Manager
NewsNow Publishing Limited
Tel: +44 (0)20 7471 0400
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