From: Bill Verzal (BVerzal@KOMATSUNA.COM)
Date: Mon Jul 14 2003 - 11:49:28 EDT
If hdisk1 is the last internal disk on the channel, check the on-board SCSI
terminator/cable.
--------------------------------------------------------
Bill Verzal
AIX Administrator, Komatsu America
(847) 970-3726 - direct
(847) 970-4184 - fax
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| | "Green, Simon" |
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| | 07/14/2003 10:25 |
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>-------------------------------------------------------------------------------------------------------------------------------|
| |
| To: aix-l@Princeton.EDU |
| cc: |
| Subject: How to diagnose scsi/disk error on M80 |
>-------------------------------------------------------------------------------------------------------------------------------|
One of our M80s is giving me a bit of trouble.
Last week, one of the internal SCSI disk started to act up: hardware
errors,
some LVM I/O errors and some stale partitions.
This was hdisk1, which was half of the mirrored rootvg, so no immediate
danger: I just dropped all the copies and removed it from rootvg,
preparatory to replacing it again.
I then realised that this was actually a replacement disk, installed the
week before after its predecessor exhibited similar problems.
Obviously I was concerned at that point that maybe it was actually a SCSI
problem, so I ran some diagnostics.
Diags on scsi1 showed no problems. Although the error log analysis showed
a
disk error, a certify of the disk was clean.
After running several certifies on the disk without problems, I put it back
into rootvg and re-built the mirrors, to see what would happen. That was
on
Wednesday.
For several days, nothing much happened. I had two block-relocations.
Then
this afternoon it failed again: this time it even got declared missing!
The ELA show a fault again, but certify says it's OK. Diags against scsi1
show no problems.
I'm running a format & certify of the disk, now. What else can I do? I'm
particularly interested in how I might confirm that the SCSI adapter is OK.
(Please note: I'm in England and the server's in Switzerland.)
I suppose this _could_ just be another faulty disk, but I'd be a lot
happier
if I could find something which showed me exactly what was broken.
Simon Green
Altria ITSC Europe Ltd
AIX-L Archive at http://marc.theaimsgroup.com/?l=aix-l&r=1&w=2
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