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Re: In-place migration to LVM?
Date: Wed Nov 21 2007 - 23:22:05 EST
On Wed, Nov 21, 2007 at 05:22:50PM +0100, Malte Forkel wrote:
>
> I have a data file collection on three hard disks, each with just one
> partition. The 'primary' partition has the complete directory structure.
> The two 'secondary' partitions partially mirror that directory structure.
> There are some data files on the primary partition. For each data file on
> one of the secondary partitions, there is a soft link to it from the
> primary partition. Each partition has a couple of GB space left.
> Is it possible to migrate these partitions into one logical volume without
> loosing or backing up the data? If I had a backup storage large enough to
> hold all the data ...
Ouch.
First, ensure that you have exhausted all backup options. Backup to another machine?
How large are these disks? You say each has a couple of GB spare; is that free-space on the drive or that a partition with a filesystem that has some free space?
You don't necessarily need backup storage large enough for all the data, just do do one partition at a time.
Is the data already compressed?
I've never tried resizing non-LVM partitions so I wouldn't attempt that without a backup. Hey, I don't attempt anything without a backup; including doing a backup.
Your best bet may be to buy a fourth disk and make it the firs physical volume of a volume group, make your LV and put a filesystem on it. Transfer one drives data to it and do the shell-game from there.
Or create an LV+filesystem and use it to hold a compressed tarball of the first data partition. It all depends on the size of the data set and the size of these drives.
Doug.
-- To UNSUBSCRIBE, email to debian-user-REQUEST@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.orgReceived on Wed Nov 21 23:22:41 2007
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