Date: Sat, 14 Nov 2009 17:03:46 +0000 From: Hugo Silva <hugo@barafranca.com> To: Lorenzo Perone <lopez.on.the.lists@yellowspace.net> Cc: freebsd-fs@freebsd.org Subject: Re: gmirroring slices Message-ID: <4AFEE2F2.6000609@barafranca.com> In-Reply-To: <1A8F306A-8749-471B-94EA-FC8435A30C34@yellowspace.net> References: <1A8F306A-8749-471B-94EA-FC8435A30C34@yellowspace.net>
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Lorenzo Perone wrote: > > Hello, > > I was wondering if anyone could give me an advice on how viable and > reliable it is, to use gmirror on a slice of an MBR-style partitioned > disk, and use the second slice(s) within a zpool. > > I remember a discussion here on where metadata is kept (always at the > end of the disk as opposed to the end of the given consumer?), so I > wasn't sure about how much of a good idea this might be. The reason > I'd like to have it like this is, that I had mixed bad experiences in > the effort of using ZFS as a boot and root volume, so I'd rather keep > a traditional slice for booting/rooting, and a zpool for the > production jails on that machine. > > The example would be > > provider: mirror/gm0 > consumers: ad6s1 and ad8s1 > > zpool mirror made out of > ad6s2 and ad8s2 > > while experimenting, I got into the problem that gmirror label -v -b > round-robin gm0 ad6s1 got a permission denied (even with sysctl > kern.geom.debugflags=16/17). Any hints on what can cause this (I might > have screwed up something with fdisk/bsdlabel, but after > doublechecking I wonder what it could be..) > > Is a GPT partition table better for this (I got further with another > machine by using GPT partitions)? > > Thanx for any advice. > > Regards, > Lorenzo > _______________________________________________ > 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" I setup an 8.0-RC3 server the other day just like this: Name Status Components mirror/gm0s1 COMPLETE ad4s1 ad6s1 pool: storage state: ONLINE scrub: none requested config: NAME STATE READ WRITE CKSUM storage ONLINE 0 0 0 mirror ONLINE 0 0 0 ad4s2 ONLINE 0 0 0 ad6s2 ONLINE 0 0 0 errors: No known data errors I would like to try setting this up with gpart too, but I had to get this server running asap and I knew I could make it work like this.
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