Date: Tue, 24 May 2011 22:58:31 -0400 From: Jason Hellenthal <jhell@DataIX.net> To: "Vladislav V. Prodan" <universite@ukr.net> Cc: fs@freebsd.org Subject: Re: how to import raidz2, if only one disk is missing? Message-ID: <20110525025831.GA2363@DataIX.net> In-Reply-To: <4DDC128F.80203@ukr.net> References: <4DDC0D13.3030401@ukr.net> <20110524201118.GF2415@garage.freebsd.pl> <4DDC128F.80203@ukr.net>
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--4Ckj6UjgE2iN1+kY Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Vladislav, Hi. Just a heads up on this instead of waiting for the MFC to happen you may want to boot mfsBSD from Martin Matuska [1][2] to check your disks ahead of time and diagnose whether it is worthwhile waiting for the MFC. Recently another fellow IRC'er had a ZFSv15 pool on 8.2-X and had one drive faulted that needed to be replaced. These drives were moved from one machine to another and the drive that faulted was unrecoverable for whatever reason, but unknown to the user, he had a second drive in the new machine that was showing up with some massive DMA errors after a reboot making the total drives that were faulted and irreparable greater than the amount that is allowed to be faulted in a raidz1 pool ultimately making his whole pool unrecoverable. Unfortunately he ended up having to destroy the pool and live with the loss of data. Anyway to cut to the facts of that. Only one of the faulted drives were picked up by ZFS v15 "don't know why" and the one with all the DMA errors only shown up in v28 as faulted which I found to be quite odd. It would be to your advantage to run some drive tests using smartctl or whatever your comfortable with and also grab one of the v28 images below to test boot and try repairing while waiting. Good luck. 1). http://mfsbsd.vx.sk/iso/mfsbsd-8.2-zfsv28-i386.iso 2). http://mfsbsd.vx.sk/iso/mfsbsd-8.2-zfsv28-amd64.iso On Tue, May 24, 2011 at 11:18:23PM +0300, Vladislav V. Prodan wrote: > 24.05.2011 23:11, Pawel Jakub Dawidek wrote: > > Which FreeBSD version and ZFS version are you running? If this is v15, > > then you might need 9-CURRENT to import that pool or wait for MFC of > > v28, which should happen soon. >=20 > FreeBSD 8.2-STABLE #0: Wed Apr 20 03:20:47 EEST 2011=20 > vlad11@beastie.mydomain.local:/usr/obj/usr/src/sys/otrada.1 amd64 >=20 > Yes, thank you, wait for MFC. > For a 9-CURRENT serious slowdown in the speed of SATA drives. >=20 --=20 Regards, (jhell) Jason Hellenthal --4Ckj6UjgE2iN1+kY Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.17 (FreeBSD) Comment: http://bit.ly/0x89D8547E iQEcBAEBAgAGBQJN3HBXAAoJEJBXh4mJ2FR+h34IAJfGmh38LYVKkW42i2SJK7hS XppU01/xvYEbXaEBwxHAOa/m+IHRm7o2diD2o1hnINL+4NyuufAYU7uelLE3+etq ORhMllm+AwOLC90DHo01/eJ7KlapIsOMeRkKeSCzlAGXzhOGFsH30BLtn97d7keR 9zzVkDVUwI0zwafP+85X3kaJ816b5YjJb0wYpTXCcPDEsRY90l7GNvmI2OX9VWqR 954CnXSU3U0Jv2+gkoTpth4IxcDcBhKY+eVb/b9498oTqodnNYctHMk9F3lnRVDy D96IjHYDOR+152dNfRpJIXKDehzPnwhZnb5nRv6j3jWrTGrE+ZFOgN4UZPqt1H8= =CMGh -----END PGP SIGNATURE----- --4Ckj6UjgE2iN1+kY--
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