[linux-lvm] Newbie of LVM
Matthew Gillen
me at mattgillen.net
Fri Dec 9 19:12:43 UTC 2005
Way Loss wrote:
> Hi all,
>
> I am very new to LVM. Here is the detail of my
> current fs.
> Filesystem Size Used Avail Use% Mounted on
> /dev/md1 9.4G 2.5G 6.5G 28% /
> /dev/md2 9.4G 7.6G 1.4G 85% /home
> /dev/md3 9.4G 6.6G 2.4G 74% /var
> /dev/md4 958M 18M 892M 2% /tmp
> /dev/md5 153G 119G 27G 82% /www
>
> My md5 is almost full and I wanna use LVM to merge
> my md5 with a new partition from a new hdd. I wanna
> ask if this possible for LVM to merge 2 partition
> together while one of them have data on it? I can't
> suffer any data loss and want to make sure that LVM
> works perfectly to what I want.
> Thanks all.
You're out of luck. You can't take an existing partition and keep the
data yet switch it over to LVM. It's like RAID that way: you need to
set up the lower level stuff *before* you format the disk/partition with
your filesystem and start putting data on it.
To do what you want is possible, provided that you created an LVM from
the beginning that had md5 as a PhysicalVolume, then created your
filesystem on the Logical Volume. But it seems clear from your fstab
that you didn't do that.
Sorry,
--Matt
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