Summary: BA-350 and mylex raid controller

From: Kjell Andresen <kjell.andresen_at_usit.uio.no>
Date: Wed, 10 May 2000 17:20:47 +0200 (CEST)

Thanks to:
"Janssen, Gerard TIS Ehv" <Gerard.Janssen_at_nl.origin-it.com>
Mitch Kulberg <mok_at_unx.dec.com>
alan_at_nabeth.cxo.dec.com

Summary: Replace the disk if you can afford it.
Be careful if more than one disk is reporting this error.

Extra question: On which CD do I locate dia? (I've checked assoc. vol.2
and sw prod. 2/3 before my cd-player failed)

Gerard:
------------------------------------------------------------
Have you tried 'dia -R -i disk | more' already???

Soft device errors are most likely BAD-BLOCK-REPLACEMENTS (BBR's) and are
normal on SCSI drives.
If you receive many (let's say > 100 in a few days) and you have a
maintenance contract with Compaq I would advise you to replace the disk with
a new one...

Mitch:
------------------------------------------------------------
I was once told that mylex controllers don't deal with soft errors too
well and that if you get them to replace the disks.

CAUTION: Are you getting soft errors on more than one disk?

If so make sure your data is backed up. I had a problem once where I
had soft errors on multiple disks. When I swapped the first one out and
rebuilt it, the rebuild failed. I have always believed that the soft
errors on the other disk is what screwed me. So I had to rebuild the
whole raidset from scratch.

That's just one person's opinion. If you have a service contract, I
would nuke the disk.

Alan:
        How long was the subsystem operating without soft errors?

[I do not rememeber, they have be there for quite some time]

        While it isn't uncommon for disks to have recoverable
        errors, lots of them are often a hint that it is wise
        to replace a disk. If the disks are part of an array
        use the control utility to replace the disks one at a
        time, so that RAID can regenerate the data for the new
        disk.

        For JBOD disks; backup, replace, restore.

Regards, Kjell
Received on Wed May 10 2000 - 15:21:29 NZST

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