Yes RAIDZ2 should enable a 2 drive failure without the array faulting so something strange is going on there somewhere. Silly question, what size drives and what driver are you using? Regards Steve ----- Original Message ----- From: "Paul Wootton" <paul-freebsd_at_fletchermoorland.co.uk> To: "freeBSD-CURRENT Mailing List" <freebsd-current_at_freebsd.org> Sent: Monday, November 05, 2012 10:25 AM Subject: ZFS RaidZ-2 problems > I've already posted this to freebsd-fs_at_ but still have no idea as to why > the below has happened. > > > On 10/30/12 09:08, Paul Wootton wrote: >> Hi, >> >> I have had lots of bad luck with SATA drives and have had them fail on >> me far too often. Started with a 3 drive RAIDZ and lost 2 drives at >> the same time. Upgraded to a 6 drive RAIDZ and lost 2 drives with in >> hours of each other and finally had a 9 drive RAIDZ (1 parity) and >> lost another 2 drives (as luck would happen, this time I had a 90% >> backup on another machine so did not loose everything). I finally >> decided that I should switch to a RAIDZ2 (my current setup). >> Now I have lost 1 drive and the pack is showing as faulted. I have >> tried exporting and reimporting, but that did not help either. >> Is this normal? Has any one got any ideas as to what has happened and >> why? >> >> The fault this time might be cabling so I might not have lost the >> data, but my understanding was that with RAIDZ-2, you could loose 2 >> drives and still have a working pack. >> I do know the fault could also be the power supply, controller etc. I >> can take care of all the hardware. >> The issue I have is, I have a 9 RAIDZ-2 pack with only 1 disk showing >> as offline and the pack is showing as faulted. >> If the power supply was bouncing and a drive was giving bad data, I >> would expect ZFS to report that 2 drives were faulted (1 offline and 1 >> corrupt) >> >> Is there a way with ZDB that I can see why the pool is showing as >> faulted? Can it tell me which drives it thinks are bad, or has bad data? >> >> I do still have the 90% backup of the pool and nothing has really >> changed since that backup, so if someone wants me to try something and >> it blows the pack away, it's not the end of the world. >> >> >> Cheers >> Paul >> >> >> pool: storage >> state: FAULTED >> status: One or more devices could not be opened. There are insufficient >> replicas for the pool to continue functioning. >> action: Attach the missing device and online it using 'zpool online'. >> see: http://illumos.org/msg/ZFS-8000-3C >> scan: resilvered 30K in 0h0m with 0 errors on Sun Oct 14 12:52:45 2012 >> config: >> >> NAME STATE READ WRITE CKSUM >> storage FAULTED 0 0 1 >> raidz2-0 FAULTED 0 0 6 >> ada0 ONLINE 0 0 0 >> ada1 ONLINE 0 0 0 >> ada2 ONLINE 0 0 0 >> 17777811927559723424 UNAVAIL 0 0 0 was >> /dev/ada3 >> ada4 ONLINE 0 0 0 >> ada5 ONLINE 0 0 0 >> ada6 ONLINE 0 0 0 >> ada7 ONLINE 0 0 0 >> ada8 ONLINE 0 0 0 >> ada10p4 ONLINE 0 0 0 >> >> root_at_filekeeper:/storage # zpool export storage >> root_at_filekeeper:/storage # zpool import storage >> cannot import 'storage': I/O error >> Destroy and re-create the pool from >> a backup source. >> >> root_at_filekeeper:/usr/home/paul # uname -a >> FreeBSD filekeeper.caspersworld.co.uk 10.0-CURRENT FreeBSD >> 10.0-CURRENT #0 r240967: Thu Sep 27 08:01:24 UTC 2012 >> root_at_filekeeper.caspersworld.co.uk:/usr/obj/usr/src/sys/GENERIC amd64 > _______________________________________________ > freebsd-current_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" > ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster_at_multiplay.co.uk.Received on Mon Nov 05 2012 - 09:50:02 UTC
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