How does gmirror know of a faulty drive
lists at jnielsen.net
Wed Feb 14 20:22:33 UTC 2007
On Wednesday 14 February 2007 15:10, Brian A. Seklecki wrote:
> On Wed, 27 Jul 2005, Ivan Carey wrote:
> > In FreeBSD 5.3 I have set up 2 drives in RAID-1 format.
> > How will I know if one of the drives is faulty such as either not working
> > or
> > has some lost sectors?
> > Is it possible to have gmirror email me if there is a problem?
> I just actually replied to a thread about this. Apparently there is no
> automatic demotion of a device to DEGRADED. I just had a provider error
> for a good 5 minutes of SCSI kernel messages (bad sectors, grown defects),
> without any automatic corrective action taken by gmirror(4)
In my experience gmirror will automatically detach any consumer that has a
hard read or write error. (I haven't had occasion to use gmirror with SCSI
devices yet though, so this could just be limited to ATA.)
Re: e-mail notification, you can get a daily report if you
set 'daily_status_gmirror_enable="YES"' in /etc/periodic.conf. If you'd like
more frequent checks it wouldn't be hard to put a script together to
run "gmirror status" every N minutes from cron, parse the output and forward
it to you if it said anything but COMPLETE for each provider.
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