Date: Mon, 19 Jul 2010 11:18:25 -0500 From: Adam Vande More <amvandemore@gmail.com> To: Garrett Moore <garrettmoore@gmail.com> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: Problems replacing failing drive in ZFS pool Message-ID: <AANLkTimgi2Btzv9krZZPHCPiyCcwtQyF72BmRzA1kuvi@mail.gmail.com> In-Reply-To: <AANLkTikPOgIqkm3GhIsEnvuvEHvlc44cnh6GJQ1k7Ja_@mail.gmail.com> References: <AANLkTimOrwHe7xiwoap2H2mUtA7vU6TjENkPC4yJ02_z@mail.gmail.com> <AANLkTimOIgCIO4txpPeeoMrRSYAqM25V7cm-h7djmZUC@mail.gmail.com> <AANLkTikPOgIqkm3GhIsEnvuvEHvlc44cnh6GJQ1k7Ja_@mail.gmail.com>
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On Mon, Jul 19, 2010 at 10:56 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 don't have / on ZFS; I'm only using it as a 'data' partition, so I should > be able to try your suggestion. My only concern: is there any risk of > trashing my pool if I try your instructions? Everything I've done so far, > even when told "insufficient replicas / corrupt data", has not cost me any > data as long as I switch back to the original (dying) drive. If I mix in > export/import statements which might 'touch' the pool, is there a chance it > will choke and trash my data? > I'm not sure what's going on in your case, but I have cron'd a zpool scrub for my pool on weekly basis to avoid this. I run a / zfs mirror and one day I could no longer boot and saw the dread 'insufficient replicas'. I eventually got it when disk started to work again briefly then did a snapshot/send offsite, redid system with new install & disk then restored data. The export/import shouldn't hurt, I used that when booting off an MFSBSD cd and imported the zpool to send from there. Perhaps you might want to consider RAIDZ2 with all those disks. -- Adam Vande More
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