4 Feb
2013
4 Feb
'13
1:13 p.m.
Hi Paul,
On Mon, Feb 04, 2013 at 12:30:53PM +0000, Paul Stimpson wrote:
I think I need to either:
1) Find someone who is a Clonezilla god who can tell me how to
make Clonezilla shrink the PV using some of the advanced options.
I don't know anything about CloneZilla I'm afraid, but…
2) Restore the image to one of our new test boxes,
shrink the PV
to under 250GB and then make a new Clonezilla image from that.
…shrinking a PV is easy.
- Boot a live distribution or rescue environment
- Shrink the filesystem on the LV and the LV along with it:
# lvresize --resizefs -L250G /dev/yourvg/yourlv
If you haven't got a recent enough LVM for it to support
--resizefs, you'll have to do it as a resize2fs first (or
equivalent for your FS), followed by an lvresize.
- Shrink the PV to match, assuming your PV is /dev/sda1:
# pvresize /dev/sda1 --setphysicalvolumesize 250G
- HAVE BACKUPS
Finally you'll need to shrink the partition /dev/sda1 which will
involve deleting the partition and recreating it again smaller.
HAVE BACKUPS
This is the scariest part. You could use something like:
HAVE BACKUPS
# pvs --units s
To see the size of the (now shrunk) PV in sectors, so you can work
out how big to make the partition.
One trick I sometimes use to make it a little less terrifying is
to shrink the PV (and everything inside it) a bit smaller than I
need, shrink the partition, and then grow everything back to the
maximum it can be as that requires no guesswork over exact sector
numbers.
All of the resize commands without an explicit target size will
grow to maximum of their container.
So there you go, simple.
Cheers,
Andy
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