Date: Tue, 01 Dec 2009 18:41:54 +0100 From: Rolf Nielsen <listreader@lazlarlyricon.com> To: freebsd-questions@freebsd.org Subject: ZFS pools of consisting of several mirrors Message-ID: <4B155562.30109@lazlarlyricon.com>
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Hello, In experimenting a bit with ZFS, I, among other things, tried something like this zpool create -R /test test mirror file[01]0 mirror file[01]1 mirror file[01]2 mirror file[01]3 mirror file[01]4 mirror file[01]5 This, according to zpool status, gives me a (file backed) pool consisting of six mirrors, each mirror consisting of two files. Now for my question. Exactly how is the pool built? Is it... 1. A RAID0 of the six mirrors? 2. A mirror of two RAID0 arrays, each array consisting of the six files file0[0-5] and file1[0-5] respectively? 3 and 4. Like 1 and 2 above, but with JBOD instead of RAID0? 5. Some other way I haven't thought about? I guess it's 1 or 3, as the zpool status output shows me six mirrors, but which is it? And, provided my guess is correct, is there a way to implement 2 or 4 without involving geom_stripe or geom_concat? Sincerely, Rolf Nielsen
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