Messages in this thread | | | Date | Sat, 1 Nov 2003 10:33:00 +0200 | From | Ville Herva <> | Subject | Re: Something corrupts raid5 disks slightly during reboot |
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On Fri, Oct 31, 2003 at 05:57:33PM -0800, you [Mike Fedyk] wrote: > On Fri, Oct 31, 2003 at 07:41:30PM -0600, Jeffrey E. Hundstad wrote: > > Try: > > > > hdparm -W0 /dev/hdX > > > > for each of your ide drives. This turns off write-caching which is > > usually a bad thing with ide drives anyway. > > > > Also try installing smartmontools, and run smartmon -a on each of the > drives. It might tell you one of the drives is going bad...
I am monitoring all my drives with smart constantly, and they haven't shown any symptoms. The corruption only happens upon reboot, which is a quite rare event for a server.
Also, I find that smart rarely gives much useful warnings beforehand when a drive is about to fail. And when the drive fails I usually get a good doze of UncorrectableErrors into the log, not silent corruption (and I've seen a lot drives to fail ;( ). Silent corruption is usually caused by the chipset or driver (seen that, too ;( ), but it has usually happened under stress, not when nothing much is being written to the drive.
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