topic SCSI read write errors - disk failed in Operating System - HP-UX

SCSI read write errors - disk failed

Mark van Hassel — Wed, 04 Sep 2002 06:10:42 GMT

Hi,

During the last week we've had several disk failures on a system. It is always the same (SEAGATE) disk. We get the following messages in the syslog.log every second:
vmunix: blkno: 16459512, sectno: 32919024, offset: -325328896, bcount: 8192.
vmunix: blkno: 16876632, sectno: 33753264, offset: 101801984, bcount: 8192.
vmunix: SCSI: Write error -- dev: b 31 0x04d000, errno: 126, resid: 8192,
vmunix: SCSI: Async write error -- dev: b 31 0x04d000, errno: 126, resid: 8192,
vmunix: blkno: 16459504, sectno: 32919008, offset: -325337088, bcount: 8192.
vmunix: blkno: 16772576, sectno: 33545152, offset: -4751360, bcount: 8192.
vmunix: SCSI: Async write error -- dev: b 31 0x04d000, errno: 126, resid: 8192,
vmunix: blkno: 15393840, sectno: 30787680, offset: -1416577024, bcount: 8192.
vmunix: SCSI: Write error -- dev: b 31 0x04d000, errno: 126, resid: 8192,
vmunix: blkno: 16489200, sectno: 32978400, offset: -294928384, bcount: 8192.
vmunix: SCSI: Read error -- dev: b 31 0x04d000, errno: 126, resid: 2048,
vmunix: SCSI: Async write error -- dev: b 31 0x04d000, errno: 126, resid: 8192,
vmunix: blkno: 8, sectno: 16, offset: 8192, bcount: 2048.
vmunix: SCSI: Async write error -- dev: b 31 0x04d000, errno: 126, resid: 8192,
vmunix: blkno: 16478648, sectno: 32957296, offset: -305733632, bcount: 8192.
vmunix: SCSI: Read error -- dev: b 31 0x04d000, errno: 126, resid: 2048,
vmunix: blkno: 8, sectno: 16, offset: 8192, bcount: 2048.
vmunix: SCSI: Async write error -- dev: b 31 0x04d000, errno: 126, resid: 8192,
vmunix: blkno: 16907184, sectno: 33814368, offset: 133087232, bcount: 8192.

Ioscan reports NO-HW and diskinfo fails.
HP has replaced the disk several times. The last disk they replaced they tested in their labs and it worked fine !

Has enayone encountered something like this before ?

Thanks in advance,

Mark

Re: SCSI read write errors - disk failed

Vincent Farrugia — Wed, 04 Sep 2002 06:14:51 GMT

Hello,

If it is not a disk problem, then it is a communication problem. How is this disk connected? What is the server or disk array where it lies?

Vince

Re: SCSI read write errors - disk failed

Paula J Frazer-Campbell — Wed, 04 Sep 2002 06:39:39 GMT

Mark

These errors on block number indicate that it is the disk at fault again.

THe errors are being reported from the disk itself which indicates that the system is "Seeing" all the way to the disk.

To err on the safe side re-seat all cables in the chain and then get a replacement disk.

HTH

Paula

Re: SCSI read write errors - disk failed

Mark van Hassel — Wed, 04 Sep 2002 06:55:51 GMT

Thanks for the quick responses.
The disk is one of 8 in a HASS disk cabinet. The backplane of the HASS has been replaced as well as the ( FW differential) SCSI cables and the SCSI controller.
When I pull out the disk and replace it, the disk is finem again, however after a few hours the messages appear again and the disk is not accessible.

Mark

Re: SCSI read write errors - disk failed

Paula J Frazer-Campbell — Wed, 04 Sep 2002 12:11:41 GMT

Mark

Check the firmware level on the disk.

Also has mediainit been used on this disk? as this could couse a problem.

Paula

Re: SCSI read write errors - disk failed

Mark van Hassel — Wed, 04 Sep 2002 12:35:42 GMT

No mediainit has been used. Firmware lvl is HP05, the same as the other disks.

Re: SCSI read write errors - disk failed

Paula J Frazer-Campbell — Wed, 04 Sep 2002 12:40:06 GMT

Mark

Can you move this disk to another slot in the HASS ?

My feeling is still a bad disk -

An Idea !!

Can you zap it and do a newfs.

Paula

Re: SCSI read write errors - disk failed

Mark van Hassel — Wed, 04 Sep 2002 12:48:04 GMT

All slots are occupied. The disk has been replaced 6 times over a period of three weeks, so the chance that it is a bad disk is very slim in my opinion.
I can't do a newfs, because it is part of a fs that is spread over multiple disks.

Re: SCSI read write errors - disk failed

Ashwani Kashyap — Wed, 04 Sep 2002 13:12:04 GMT

Hi ,

I remember I had encountered something like that . Everythinh showed towards a disk failure . Finally I got the SCSI controller replaced and that took care of the problems .
Try the same thing and see if it helps .

Thx