On Wed, 17 Jan 2007 23:30:55 +1000
Thilo Jeremias <jeremias@optushome.com.au> wrote:

> is  the changed checksum  always deterministicly the same?
> Meaning is this a systematic error, or
> (Where I would guess for drive/cable/power etc problems) is it always
> a different checksum (I mean are there more than two checksums)
> 
> If it is deterministic, it probably just happens at a certain block,
> so it might help then  to isolate the location where the fault is to
> find the cause
> 
Is there any chance the two different mirrors -- you did say RAID,
right, though I confess I don't remember which variant -- have
different versions of the block?  That shouldn't happen, of course, but
if it did it would explain the problem.


		--Steve Bellovin, http://www.cs.columbia.edu/~smb