Date: Mon, 3 Aug 2009 23:25:15 +0200 From: Gabor Radnai <gabor.radnai@gmail.com> To: freebsd-stable@freebsd.org Subject: ZFS: drive replacement performance Message-ID: <b16f6a750908031425v60000d24t97b7b7905f3f65e@mail.gmail.com>
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> On Tue, Jul 7, 2009 at 3:26 PM, Mahlon E. Smith <mahlon at martini.nu <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>>; wrote: *> > On Tue, Jul 07, 2009, Freddie Cash wrote: *> >* > *> >* > This is why we've started using glabel(8) to label our drives, and then *> >* add *> >* > the labels to the pool: *> >* > # zpool create store raidz1 label/disk01 label/disk02 label/disk03 *> >* > *> >* > That way, it does matter where the kernel detects the drives or what the *> >* > physical device node is called, GEOM picks up the label, and ZFS uses the *> >* > label. *> >* *> >* Ah, slick. I'll definitely be doing that moving forward. Wonder if I *> >* could do it piecemeal now via a shell game, labeling and replacing each *> >* individual drive? Will put that on my "try it" list. *> >* * > Yes, this can be done piecemeal, after the fact, on an already configured > pool. That's how I did it on one of our servers. It was originally > configured using the device node names (da0, da1, etc). Then I set up the > second server, but used labels. Then I went back to the first server, > labelled the drives, and did "zpool replace storage da0 label/disk01" for > each drive. Doesn't take long to resilver, as it knows that it's the same > device. It seems a very good practice but how did you do actually on your first already configured server? I am struggling with the followings: 1. on online disk, member of configured raidz pool, "glabel label" fails with error message "operation not permitted". 2. if I make disk offline, glabel succeed, but making disk back to online clears label. 3. if I make disk offline, glabel succeed, but "zpool replace <pool> <dev> <label>" fails with "/dev/label/<label> is part of active pool <pool>" 4. export <pool>, glabel, import <pool> neither works. A detailed guide in "for dummies" style would be appreciated. Thanks, Gabor
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