Am 06.03.2012 18:25, schrieb Neil Bothwick: > On Tue, 6 Mar 2012 16:32:56 +0000, Stroller wrote: > >>> … I initially want to replace the 3x1TBs with a single 3TB drive but >>> i've never removed/replaced a drive in an LVM setup before. I think I >>> understand how it is done, using pvmove … >> >> Or you could just format and mount the new drive and use `cp`. > > Thereby instantly removing the benefits of LVM and making it almost > impossible to extend the space by adding another drive when needed. >
I don't think so. vgextend the volume group with the new disk, lvcreate a new volume using only extents from the new disk, copy data over to it, swap mount points, done. Plus points: Removes fragmentation of the old file system. Also probably faster. > To the OP, pvmove is perfectly safe as it does a copy;verify;delete on > one small block of extents at a time. It also ensures that any new writes > while pvmove is running go to the new drive, so you can still use the > system while moving (try doing that with cp :). > > Wait, are we talking about a system disk (root and stuff)? I was under the impression that it's just a data dump. Of course, with system partitions and other media that cannot be handled read-only for a longer time, pvmove or lvchange are the better options. Regards, Florian Philipp
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