| 1 |
On Sat, 21 Jul 2012 14:11:03 -0700 |
| 2 |
walt <w41ter@×××××.com> wrote: |
| 3 |
|
| 4 |
> I know there are a few lvm2 experts lurking here :) |
| 5 |
> |
| 6 |
> I have a 500gig disk that is split roughly in half between two volume |
| 7 |
> groups, each containing four physical volumes, and each vg is |
| 8 |
> formatted into an ext4 filesystem of roughly 250GB. |
| 9 |
> |
| 10 |
> What I plan to do is merge the two volume groups into one, containing |
| 11 |
> one big ext4 filesystem, which will contain all of the files currently |
| 12 |
> on the disk. |
| 13 |
> |
| 14 |
> Can this be done without copying one of the existing ext4 filesystems |
| 15 |
> to a separate drive first, and then copying it back after extending |
| 16 |
> the remaining vg/filesystem? (One filesystem has 24GB free and the |
| 17 |
> other has 25GB free.) |
| 18 |
> |
| 19 |
> I'm expecting a "no" but I'd like to be wrong :) |
| 20 |
> |
| 21 |
> |
| 22 |
|
| 23 |
For the most part, the answer is no. |
| 24 |
|
| 25 |
But to be totally accurate, it can be done - you just have to shuffle |
| 26 |
partitions and contents around on the disk a lot in this fashion: |
| 27 |
|
| 28 |
Move something a bit further towards the end, |
| 29 |
Extend the thing in front of it to use the now-free space. |
| 30 |
|
| 31 |
But be warned, it's a complete PITA and a lot like playing the "15 |
| 32 |
pieces" game with your disk volumes. |
| 33 |
|
| 34 |
You have about 10% free space on both vgs, so the odds you can move |
| 35 |
things around successfully are not good. Get yourself a 500G portable |
| 36 |
drive to help with the migration. |
| 37 |
|
| 38 |
|
| 39 |
-- |
| 40 |
Alan McKinnon |
| 41 |
alan.mckinnon@×××××.com |
Archives