On Tue, 18 Aug 2009 12:01:26 pm Mark Lord wrote: > But really, it should be using DM/LVM when there are multiple devices.
Chris Mason addressed a number of these points in this January 2008 comment on LWN - http://lwn.net/Articles/265533/ - especially: # This is something LVM cannot provide because it cannot maintain # consistent checksums for the FS. and # When multiple devices are present, Btrfs will want to know it is # mirroring on different physical spindles. This is a challenge # with LVM since the locations of physical extents can change without # the FS knowing about it. Even if there were hooks so the FS could # know the current extent mappings, it would end up duplicating a copy # of the mappings internally. -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC This email may come with a PGP signature as a file. Do not panic. For more info see: http://en.wikipedia.org/wiki/OpenPGP
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