[linux-lvm] Random file system errors

[Gaute Lund]

Thanks again Clyde, Geoff and f-lvm at media.mit.edu and others who gave 
advice. Turns out it was a RAM issue.

Just to close off this threadm, even if it's old. This is "only" a 
private/testing box, and I've been busy, so I've only been able to test 
stuff every now and then.

A few runs of memtest86 found no errors. I turned to the "md5sums of parts 
of disks" approach. If I read large chunks (5 GB), from different places on 
the disks, with 5+ iterations with each chunk, I got errors occasionally 
(diverging md5sums). But this is 10 disks across two controllers and all 
but two gave errors several times, albeit seldomly.

I started swapping hardware, and with different RAM I am OK. I guess clean 
runs of memtest shouldn't be trusted 100%. I can even say, the way these 
errors have crept up on me gradually over months(!), it means the RAM 
stick(s) have failed gradually, without being touched or anything. Scary!

-gaute

--On 29. April 2009 08:19 +0200 Gaute Lund <gaute at idrift.no> wrote:

> Thanks, and also to others who gave feedback. The approach with
> md5summing devices came from another source too, and I'll try a
> systematic approach as soon as time allows.