[linux-lvm] Cleanly removing a PV from an LV or, how do I get more available extents?
dax at gurulabs.com
Mon Jul 19 05:30:38 UTC 2004
On Sat, 2004-07-17 at 15:49, Bharat Mediratta wrote:
> I've been happily using LVM for a couple of months now to aggregate a
> bunch of disks together into one logical drive for a Debian box that I
> use as an over-the-network backup of my various other boxen. Thus far,
> it's been great.
> Recently however, I started getting parity errors on one of the drives
> that's in my logical volume. It's a tiny drive that I threw in there
> merely because I had it, and its loss will not be missed. I just want
> to remove it altogether and pretend like it never existed. I'd like to
> preserve the data that's on the drive, if possible, but if not -- I'm ok
> with losing it, since that data will come back next time I run my backups.
> I read the FAQ, the HOWTO and scanned the mailing list archives and it
> appears that I need to do a pvmove to get the data off of that drive,
> and then a vgreduce to remove it from the volume group. Unfortunately,
> when I try to do the pvmove, I get:
> % pvmove /dev/sdb
> No extents available for allocation
> I'm assuming that this means that there's nowhere to move the data that
> is on /dev/sdb. I further assume this means that I need some free
> physical extents somewhere. This is where I'm confused. When I set up
> LVM, I allocated all of my spare drives to it. So I have a 271GB
> logical volume of which I'm using only 32GB. So I know that I have free
> space to move the data around; I just don't know how to do it.
Your logical volume is 100% used by the filesystem. It sounds like the
filesystem isn't full though, but LVM doesn't know that.
You need to shrink your filesystem, then shrink your LV, then use
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