Am Mittwoch, 7. Januar 2004 16:42 schrieb Arthur Corliss:
> On Wed, 7 Jan 2004, Rainer Krienke wrote:
> > In between I contacted the vendor of the hardware IDE raids. The
> > technician confirmed that these raids have a read/write cache and that
> > there is *no* battery backup. So in case of an active filesystem where
> > suddenly there is a powerfail, it is likely that the hardware cache in
> > the raid is not written to disk and the filesystem will be become
> > inconsitent. And this very probably happened in my case.
> > So the remaining question is only why xfs_repair was unable to repair the
> > damaged filesystem....
> If I had to hazard a guess, I'd think that the transaction log, being hit
> much more frequently than most other portions of the filesystem, would be
> much more aggressively cached by the hardware's algorithms, which would
> leave the log that much more inconsistent than the filesystem. *That*
> can't help during repairs. . .
> In any event, it sounds like you need a UPS on that system now, eh?
In between we found another possibility. Our vendor told us that now there is
a firmware upgrade that allows the write cache to be disabled. So we are
probably going to do this, to get rid of this problem.