Date: Wed, 28 Dec 2016 11:42:53 -0400 From: Joseph Mingrone <jrm@ftfl.ca> To: freebsd-fs@freebsd.org Cc: Dmitry Marakasov <amdmi3@amdmi3.ru>, Steven Hartland <killing@multiplay.co.uk> Subject: Re: ZFS resilver from disk with bad sectors constantly restarts Message-ID: <86zijgf4aq.fsf@ftfl.ca> In-Reply-To: <20151030103614.GL57666@hades.panopticon> (Dmitry Marakasov's message of "Fri, 30 Oct 2015 13:36:14 %2B0300") References: <20151030103614.GL57666@hades.panopticon>
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--=-=-= Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Dmitry Marakasov <amdmi3@amdmi3.ru> writes: > I've just got a case where resilvering a new replacement disk in raidz2 > never finished. > The problem: one disk in raidz is failing by having a large number of > unreadable sectors. It's replaced with a spare. Resilver though is > constantly restarted with log full of read error from bad disk.=20 > It looks like this: > --- > pool: spool > state: ONLINE > status: One or more devices is currently being resilvered. The pool will > continue to function, possibly in a degraded state. > action: Wait for the resilver to complete. > scan: resilver in progress since Wed Oct 28 05:26:28 2015 > 369G scanned out of 9,87T at 123M/s, 22h29m to go > 41,4G resilvered, 3,65% done > config: > NAME STATE READ WRITE CKSUM > spool ONLINE 0 0 0 > raidz1-0 ONLINE 0 0 0 > ada0 ONLINE 0 0 0 > ada1 ONLINE 0 0 0 > spare-2 ONLINE 0 0 733 > ada11 ONLINE 0 0 0 > ada2 ONLINE 0 0 0 (resilvering) > raidz1-1 ONLINE 0 0 0 > ada3 ONLINE 0 0 0 > ada4 ONLINE 0 0 0 > ada5 ONLINE 0 0 0 > raidz1-2 ONLINE 0 0 0 > ada6 ONLINE 0 0 0 > ada7 ONLINE 0 0 0 > ada10 ONLINE 0 0 0 > spares > 588540573008830286 INUSE was /dev/ada2 > errors: No known data errors > --- > `resilver in progress since' date is constantly reset, so resilved > progress cannot pass beyond 5% or so. My guess is that it happens on > read errors on ada11. I think I've seen (resilvering) on ada11 line > couple of times. > In the end I've had to offline ada11 and after that resilver completed > in under 16 hours. However the situation doesn't seem normal, as I'd > prefer to not lose redundancy with offlining dying disk and still be > able to use it for resilvering (imagine there were bad sectors on ada0/1 > as well, but not intersecting with bad sectors on ada11), or at least > some more verbose indication of why the resilver is constantly restarted. > I should also note that's outdated FreeBSD 9.1, so maybe that problem > was fixed already. We have been dealing with, what seems to be, the same issue on 11.0-RELEASE= with a two-raidz1-vdev pool. You said that your issue was with a raidz2, but yo= ur zpool status output shows raidz1. The problem disk had checksum mismatches= and smart was reporting errors, but it was still online. The resilver would ma= ke it through many hours, but then restart. This loop went on for a few days. A= s in your case, after offlining the problem disk, the replacement finished. --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQJ8BAEBCgBmBQJYY919XxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXQ1NUIwOTNBNzI2QzM4ODU1NzEyMkJBRDUz NkE0MEM4M0IwRDZFRjlFAAoJEDakDIOw1u+eBWEQAJVFWKPF9qvJTBvbt0JSsKw7 tgFYsa/EMD59rJpyIW+ASpfLczgDBgrGZCm2LCQadbqjnCgjKhDv6/Uo4kviRoaq Xg7AWOsYAQ09B3aS9zDDySaBDu4oDFCCQFiWYqzh5xm9kVnhVvCPKTywFbFmiLq0 8WZa9fvD7pYpDFMgFLxM83Z/MWclN2Cyk+SX9g87hezcc2Sr6XRXpw2S+w/KdUIr kw1ZmuDh3nqNObjgkYAqxcNc0XLEr6J4HPEKKK76HXDp/WrQ7H0peE9NmkDYQd4W 2HUKE6xPXQQDYDCQCr5Ywg4N/VJovcOQXx7ulD2SxVzj6oRUu+8suMFubOA69dGN yNgpgqiRYOxXpsUzX8PDUglNRySLQ2ysh+NcVwQyYxfho19DtTbM0VLiFEIMkaBH qqk/0lkyr5vTRo2c/6ybghkjJsHzpP51v69120fdhR+h9UrunCo4dcjmLz4kgV6f KedkJpsxYmp7W5sC4t3QKRAy7UqQJBwzbPBOH/JVhUM2airlYxyW1VJAmMm2lQIT n8y+6oV9Ue1fuykNCQo2DC9wr2ZyVfft8DO8cuXEDdyDlWQjVmXS5x470RDY6laE 0uNHCOr2z2j6fsPqTrb3iFMuObdIxF3KZXngEVbCpe9KCenZg5PWzm/+zd7vHSuW vN/lTRHj9U3idaR6C9xo =YFhG -----END PGP SIGNATURE----- --=-=-=--
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