Date: Wed, 21 Jul 2010 02:09:18 -0400 From: Joshua Boyd <boydjd@jbip.net> To: alan bryan <alanbryan1234@yahoo.com> Cc: freebsd-stable <freebsd-stable@freebsd.org>, Dan Langille <dan@langille.org> Subject: Re: Problems replacing failing drive in ZFS pool Message-ID: <AANLkTin9zK5aK0ppNfQkUH0WueSGA60ImYGLxprctz6G@mail.gmail.com> In-Reply-To: <578438.38753.qm@web50502.mail.re2.yahoo.com> References: <4C4504DF.30602@langille.org> <578438.38753.qm@web50502.mail.re2.yahoo.com>
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On Wed, Jul 21, 2010 at 1:57 AM, alan bryan <alanbryan1234@yahoo.com> wrote: > > > --- On Mon, 7/19/10, Dan Langille <dan@langille.org> wrote: > > > From: Dan Langille <dan@langille.org> > > Subject: Re: Problems replacing failing drive in ZFS pool > > To: "Freddie Cash" <fjwcash@gmail.com> > > Cc: "freebsd-stable" <freebsd-stable@freebsd.org> > > Date: Monday, July 19, 2010, 7:07 PM > > On 7/19/2010 12:15 PM, Freddie Cash > > wrote: > > > On Mon, Jul 19, 2010 at 8:56 AM, Garrett Moore<garrettmoore@gmail.com > > > > wrote: > > >> So you think it's because when I switch from the > > old disk to the new disk, > > >> ZFS doesn't realize the disk has changed, and > > thinks the data is just > > >> corrupt now? Even if that happens, shouldn't the > > pool still be available, > > >> since it's RAIDZ1 and only one disk has gone > > away? > > > > > > I think it's because you pull the old drive, boot with > > the new drive, > > > the controller re-numbers all the devices (ie da3 is > > now da2, da2 is > > > now da1, da1 is now da0, da0 is now da6, etc), and ZFS > > thinks that all > > > the drives have changed, thus corrupting the > > pool. I've had this > > > happen on our storage servers a couple of times before > > I started using > > > glabel(8) on all our drives (dead drive on RAID > > controller, remove > > > drive, reboot for whatever reason, all device nodes > > are renumbered, > > > everything goes kablooey). > > > > Can you explain a bit about how you use glabel(8) in > > conjunction with ZFS? If I can retrofit this into an > > exist ZFS array to make things easier in the future... > > > > 8.0-STABLE #0: Fri Mar 5 00:46:11 EST 2010 > > > > ]# zpool status > > pool: storage > > state: ONLINE > > scrub: none requested > > config: > > > > NAME > > STATE READ WRITE CKSUM > > storage > > ONLINE > > 0 0 > > 0 > > raidz1 > > ONLINE 0 > > 0 0 > > ad8 > > ONLINE > > 0 0 > > 0 > > ad10 > > ONLINE 0 > > 0 0 > > ad12 > > ONLINE 0 > > 0 0 > > ad14 > > ONLINE 0 > > 0 0 > > ad16 > > ONLINE 0 > > 0 0 > > > > > Of course, always have good backups. ;) > > > > In my case, this ZFS array is the backup. ;) > > > > But I'm setting up a tape library, real soon now.... > > > > -- Dan Langille - http://langille.org/ > > _______________________________________________ > > freebsd-stable@freebsd.org > > mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org > " > > > > Dan, > > Here's how to do it after the fact: > > > http://unix.derkeiler.com/Mailing-Lists/FreeBSD/current/2009-07/msg00623.html > > --Alan Bryan > [root@foghornleghorn ~]# glabel label disk01 /dev/da0 glabel: Can't store metadata on /dev/da0: Operation not permitted. Hrmph. > > > > > > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" > -- Joshua Boyd JBipNet E-mail: boydjd@jbip.net http://www.jbip.net
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