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Re: Kernel panic, SB validate failed

To: Steve Lord <lord@xxxxxxxx>
Subject: Re: Kernel panic, SB validate failed
From: Gaspar Bakos <gbakos@xxxxxxxxxxxxxxx>
Date: Thu, 4 Dec 2003 13:54:28 -0500 (EST)
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <Pine.SOL.4.58.0312041310450.18049@antu.cfa.harvard.edu>
References: <Pine.SOL.4.58.0312041209470.18049@adic.com> <3FCF7131.9080703@adic.com> <Pine.SOL.4.58.0312041310450.18049@antu.cfa.harvard.edu>
Reply-to: gbakos@xxxxxxxxxxxxxxx
Sender: linux-xfs-bounce@xxxxxxxxxxx
Hi,

> I'll check the cable, or swap it, and see what
> happens.

Swapping the cable did not change things, unfortunately.
The main question now is recovery: how to start gently without loosing
things - if this is possible at all.
I remember that the last time I had to run xfs_repair -L, because the
filesystems were not mountable, and simple xfs_repair suggested used of
-L. So, I lost a lot of things (not a surprise, but there seemed to be
no other way to proceed, at least with my knowledge)

Here is the cable situation a bit more detailed:

Originally the failed disk was connected as hda with a cable that indeed
shows some wear (cable #1). The hdb on the same cable, however, showed no
problems (also XFS, what else).

After the crash, I replaced the faulty hda to another linux disk to boot
in, and the faulty disk went in place of hdd, which has a seemingly new
cable, and with which the previous hdd worked fine. All the xfs_check
messages I reported were done with this setup, ie. with cable #2.

Then I put back fauly to hda, and changed cable #1 to yet another cable
(#3), but the same kernel panic happens. Seems like all disks work fine
with all the cables I have (as the faulty one also used to).

This is off-topic, not directly XFS-related, although would be useful to
filter out non-XFS problems:

I am thinking if there is a way to investigate if the 'faulty' drive has
true hw problems. It is recognized at boot in (as hdd), CHS correct,
hdparm -Ii gives correct response.
- Is there any meaning of runnig "badblocks" on the device?
- Or is there an equivalent for this with xfs (badblocks was mainly used
through e2fsck -c)?

Cheers,
Gaspar


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