Date: Wed, 2 May 2012 17:18:22 -0400 From: Rich <rercola@pha.jhu.edu> To: Mark Felder <feld@feld.me> Cc: freebsd-fs@freebsd.org Subject: Re: Replacing dead drives in ZRAID2 Message-ID: <CAOeNLuoUQNv16Td8wcJzK2x==M0esYh6Y2aGvuN3sOE_W7LoSg@mail.gmail.com> In-Reply-To: <op.wdo8unq834t2sn@tech304> References: <20120501210429.D4F6910657EB@hub.freebsd.org> <op.wdo8unq834t2sn@tech304>
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It's perfectly possible to do a 3-way RAID-Z2 - just not useful, AFAIK. Also, Simon, I think the disconnect between you and the mailing list is that you are observing bad behavior of the system when you remove the drives, and you think this is a ZFS problem. This is not a ZFS problem - if the underlying storage driver (ahd) freezes up and stops handling requests (which is what it sounds like you're describing here), there's not much ZFS can do about it. - Rich On Wed, May 2, 2012 at 5:05 PM, Mark Felder <feld@feld.me> wrote: > First of all, you're testing on decade old SCSI hardware that probably > hasn't seen any serious use on a newer FreeBSD install in a very, very long > time. > > Secondly, I'm confused about the concept of a "3 drive RAIDZ2". How is that > even possible? Two drives have to be parity, so the last drive is... the > entire dataset? Why aren't you just doing a 3-way mirror? > > And finally yes, you can just yank drives in a ZFS array to simulate a > failure. After reinsertion you have to manually add them back to the pool, > but it certainly works. > > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org"
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