Date: Mon, 21 Sep 2009 11:21:45 -0600 From: Kurt Touet <ktouet@gmail.com> To: Aaron Hurt <aaron@goflexitllc.com> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS - Unable to offline drive in raidz1 based pool Message-ID: <2a5e326f0909211021o431ef53bh3077589efb0bed6c@mail.gmail.com> In-Reply-To: <4AB757E4.5060501@goflexitllc.com> References: <2a5e326f0909201500w1513aeb5ra644f1c748e22f34@mail.gmail.com> <4AB757E4.5060501@goflexitllc.com>
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I thought about that possibility as well.. but I had scrubbed the array within 10 days. I'll give it a shot again today and see if that brings up any other errors (or allows me to offline the drive afterwards). Cheers, -kurt On Mon, Sep 21, 2009 at 4:39 AM, Aaron Hurt <aaron@goflexitllc.com> wrote: > Kurt Touet wrote: >> >> I am using ZFS pool based on a 4-drive raidz1 setup for storage. I >> believe that one of the drives is failing, and I'd like to >> remove/replace it. The drive has been causing some issues (such as >> becoming non-responsive and hanging the system with timeouts), so I'd >> like to offline it, and then run in degraded mode until I can grab a >> new drive (tomorrow). However, when I disconnected the drive (pulled >> the plug, not using a zpool offline command), the following occurred: >> >> NAME STATE READ WRITE CKSUM >> storage FAULTED 0 0 1 >> raidz1 DEGRADED 0 0 0 >> ad14 ONLINE 0 0 0 >> ad6 UNAVAIL 0 0 0 >> ad12 ONLINE 0 0 0 >> ad4 ONLINE 0 0 0 >> >> Note: That's my recreation of the output... not the actual text. >> >> At this point, I was unable to to do anything with the pool... and all >> data was inaccessible. Fortunately, the after sitting pulled for a >> bit, I tried putting the failing drive back into the array, and it >> booted properly. Of course, I still want to replace it, but this is >> what happens when I try to take it offline: >> >> monolith# zpool status storage >> pool: storage >> state: ONLINE >> scrub: none requested >> config: >> >> NAME STATE READ WRITE CKSUM >> storage ONLINE 0 0 0 >> raidz1 ONLINE 0 0 0 >> ad14 ONLINE 0 0 0 >> ad6 ONLINE 0 0 0 >> ad12 ONLINE 0 0 0 >> ad4 ONLINE 0 0 0 >> >> errors: No known data errors >> monolith# zpool offline storage ad6 >> cannot offline ad6: no valid replicas >> monolith# uname -a >> FreeBSD monolith 8.0-RC1 FreeBSD 8.0-RC1 #2 r197370: Sun Sep 20 >> 15:32:08 CST 2009 k@monolith:/usr/obj/usr/src/sys/MONOLITH amd64 >> >> If the array is online and healthy, why can't I simply offline a drive >> and then replace it afterwards? Any thoughts? Also, how does a >> degraded raidz1 array end up faulting the entire pool? >> >> Thanks, >> -kurt >> _______________________________________________ >> freebsd-fs@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-fs >> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" >> >> !DSPAM:2,4ab6ac55126167777521459! >> >> > > I'm not sure why it would be giving you that message. In a raidz1 you > should be able to sustain one failure. The only thing that comes to mind > this early in the morning would be that somehow your data replication across > your discs isn't totally in sync. I would suggest you try a scrub and then > see if you can remove the drive afterwards. > > Aaron Hurt > Managing Partner > Flex I.T., LLC > 611 Commerce Street > Suite 3117 > Nashville, TN 37203 > Phone: 615.438.7101 > E-mail: aaron@goflexitllc.com > >help
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