Date: Thu, 12 Dec 2013 02:06:07 +0600 From: "Eugene M. Zheganin" <emz@norma.perm.ru> To: "freebsd-stable@freebsd.org Stable" <freebsd-stable@freebsd.org> Subject: zfs i/o error - all block copies unavailable Message-ID: <52A8C5AF.1000800@norma.perm.ru>
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Hi. I have a server, it was running 8.2-STABLE/i386 with zfs v28. All of a sudden, on last reboot I got a big bunch of "zfs i/o error - all block copies unavailable" messages and server was unable to boot. I decided that one disk is dying, detached it, and booted successfully. On a next boot I got this again. I booted from CD, replaced a zpool.cache, and booted successfully once again. On next reboot I got it again, and was unable to fix it. However (as you may already know) disks were fine, and all the data wasn't corrupted. Iread a couple of mailing list posts about this mentioning that this could be an i386 issue, and decided to deal with in a radical way: I've installed 10.0-BETA1/amd64 (booted from a LiveCD, mounted an NFS share with /usr/src and obj, and did the upgrade). Now everything is almost fine, except that I still get this message, but only once and it seems to be harmless, as the server can still be booted (I experimented and tried this like a dozen times). So, questions: - is it really harmless ? - can I run with this ? - is there any way to get rid of it ? (probably, without recreating a pool, because it holds several TBytes of user data) - and, finally - what does it mean ? Thanks. Eugene.
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