On Tue, 06 Mar 2012 18:44:18 +0100, Florian Philipp wrote: > >> 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.
But Stroller made no mention of LVM on the new disk, just format and mount. > > 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. It doesn't have to be a system disk, just something that is in use. Copying 3TB is going to take a while, making the drive unavailable to whatever needs to write for it for that amount of time may be be unacceptable and is certainly unnecessary. -- Neil Bothwick A consultant is a person who borrows your watch, tells you what time it is, pockets the watch, and sends you a bill for it.
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