annoying SCSI errors

[Steve Hutchings]

System is 9000, K-Class. 11.00 32 bit
Patches:
PHKL_24004 - S700_800 11.00 SCSI IO Subsystem Cumulative Patch
PHKL_24187 - S700_800 11.00 ioscan performance gain for SCSI Subsystem

External Litronic PC card reader -> single ended to differential ended converter -> K-Class

The following messages keep reappearing and crowding syslog:

Dec 4 08:42:36 USPCAR01 vmunix:
Dec 4 08:42:36 USPCAR01 vmunix: SCSI: bp: 09381000
Dec 4 08:42:36 USPCAR01 vmunix: dev: ef003000
Dec 4 08:42:36 USPCAR01 vmunix: cdb: 12 01 80 00 ff 00
Dec 4 08:42:36 USPCAR01 vmunix: residual: ff
Dec 4 08:42:36 USPCAR01 vmunix: status: (400) None -- Incomplete
Dec 4 08:42:44 USPCAR01 vmunix: scb->cdb: 12 01 80 00 ff 00

These seem to be benign. Any ideas on the cause? Any way to fix, or to stop and/or filter these messages?

Thanks - Steve

[Ross Martin]

Since the status is coming back as "incomplete" that means that the status read is ending prematurely (probably due to a timeout being exceeded).

It could be an I/O timing out or it could be some intermittent error on the bus.

The default action is likely to retry the I/O (since we didn't see any other errors) and the retry succeeds so we
continue along.

There are a couple of options:

1) Live with it
2) Figure out what might be happening around the times of the timeouts to see if it's just a load issue
3) If you can figure out how to view the timeout using adb, you might be able to see what the tiemout is set to and possibly increase it.

Hope that helps.

Ross Martin

[S.K. Chan]

The other thread you got in the HP-UX section ..

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x00697bb04b5cd611abdb0090277a778c,00.html