| View previous topic :: View next topic |
| Author |
Message |
cynric
Guru
Joined: 08 Oct 2004
Posts: 439
Location: Little Rock, AR
|
 Posted: Fri Jul 27, 2007 10:28 pm Post subject: LVM2 resizing questions [Resolved] |
 |
|
Either the documents I've read weren't exactly what I was looking for or I don't fully understand what I'm seeking -- I believe a little/lot of both are at play. I have two disks running under RAID-1 with LVM2. The entire disks were added to raid (no partitions). The filesystem is reiser3. There are 4 logical volumes under a single physical. I've run out of space on one logical volume (/dev/vg/music) and need to resize another (/dev/vg/movies) to add more space.
My original thought was to reduce the size of /dev/vg/movies and then add that space to /dev/vg/music. From what I understand, the general process for this would be to
- reiser_resize /dev/vg/movies
- lvresize /dev/vg/movies to something greater than the reiser_resize
- lvextend /dev/vg/music with what's left
- reiser_resize /dev/vg/movies to reclaim the resize difference
Is the above correct? It seems rather lengthy and I'd rather not find out I have the wrong steps midway through the resize. For my particular case, I could probably do away with /dev/vg/movies. If I went this route, I assume the steps involved would be something like the below?
- lvremove /dev/vg/movies
- lvextend /dev/vg/music to what's left over
Any confirmations on the above or suggestions would be greatly appreciated. In case I haven't explained the setup clearly enough, I've included some info below. Thanks.
df -Tha (only relevant portion included)
| Code: |
/dev/mapper/vg-music
reiserfs 166G 165G 1.4G 100% /mnt/music
/dev/mapper/vg-movies
reiserfs 100G 33M 100G 1% /mnt/movies
/dev/mapper/vg-backup
reiserfs 100G 20G 81G 20% /mnt/backup
/dev/mapper/vg-pictures
reiserfs 100G 5.9G 95G 6% /mnt/pictures |
cat /proc/mdstat
| Code: |
Personalities : [raid0] [raid1]
md1 : active raid1 sdb1[0] sda1[1]
488383936 blocks [2/2] [UU] |
pvdisplay
| Code: |
--- Physical volume ---
PV Name /dev/md1
VG Name vg
PV Size 465.76 GB / not usable 0
Allocatable yes (but full)
PE Size (KByte) 4096
Total PE 119234
Free PE 0
Allocated PE 119234
PV UUID eyCEcg-xyhu-w1qA-M1hf-DsJU-8mzD-giXY7e |
lvdisplay
| Code: |
--- Logical volume ---
LV Name /dev/vg/pictures
VG Name vg
LV UUID JUeV5B-ainE-RaOx-0iuK-pY6g-scfM-Zerx7Y
LV Write Access read/write
LV Status available
# open 2
LV Size 100.00 GB
Current LE 25600
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:0
--- Logical volume ---
LV Name /dev/vg/backup
VG Name vg
LV UUID 0k2e2Y-WHb8-aw3L-fzzG-1orJ-OcYL-YOxcGH
LV Write Access read/write
LV Status available
# open 2
LV Size 100.00 GB
Current LE 25600
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:1
--- Logical volume ---
LV Name /dev/vg/movies
VG Name vg
LV UUID SYvB4a-Y00f-MSrM-XrYA-KFDv-3dc8-h7UWbo
LV Write Access read/write
LV Status available
# open 2
LV Size 100.00 GB
Current LE 25600
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:2
--- Logical volume ---
LV Name /dev/vg/music
VG Name vg
LV UUID 2JG3ya-8pLx-q0MC-ruXA-FQpV-gg2g-oOVV2e
LV Write Access read/write
LV Status available
# open 2
LV Size 165.76 GB
Current LE 42434
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 253:3
|
_________________
"This Snow Crash thing -- is it a virus, a drug, or a religion?" "What's the difference?"
-- Neal Stephenson - Snow Crash
Last edited by cynric on Sun Jul 29, 2007 5:34 am; edited 1 time in total |
|
| Back to top |
|
 |
likewhoa
l33t
Joined: 04 Oct 2006
Posts: 666
Location: Brooklyn, New York
|
| Posted: Sat Jul 28, 2007 10:54 pm Post subject: |
|
|
first you need to umount then run a filesystem check on them,..
after use your FS resize feature to resize the FS, then use lvresize on them. this is all you need to really do to resize on lvm2 or any FS without it. again make sure the FS is not in used before resizing it.
good luck, and back up your data  |
|
| Back to top |
|
|
cynric
Guru
Joined: 08 Oct 2004
Posts: 439
Location: Little Rock, AR
|
| Posted: Sun Jul 29, 2007 5:09 am Post subject: |
|
|
Thanks for the reply. Looks like I was somewhat on track. So, lvresize ought to be used in the reduction and growing of the two volumes in qusetion? There seem to be a lot of duplicated commands for lvm2 (lv-reduce, extend, resize).
_________________
"This Snow Crash thing -- is it a virus, a drug, or a religion?" "What's the difference?"
-- Neal Stephenson - Snow Crash |
|
| Back to top |
|
|
likewhoa
l33t
Joined: 04 Oct 2006
Posts: 666
Location: Brooklyn, New York
|
| Posted: Sun Jul 29, 2007 5:25 am Post subject: |
|
|
| cynric wrote: | | Thanks for the reply. Looks like I was somewhat on track. So, lvresize ought to be used in the reduction and growing of the two volumes in qusetion? There seem to be a lot of duplicated commands for lvm2 (lv-reduce, extend, resize). |
they are not duplicate commands but just symbolic links to /sbin/lvm
| Code: |
darko:/root->for i in lvresize lvreduce lvextend; do file $(which "${i}");done
/sbin/lvresize: symbolic link to `lvm'
/sbin/lvreduce: symbolic link to `lvm'
/sbin/lvextend: symbolic link to `lvm'
|
yes, use lvresize to both extend and reduce logical volumes.
just remember to fsck, fs {reduce,resize}, then lv{resize,reduce}. |
|
| Back to top |
|
|
cynric
Guru
Joined: 08 Oct 2004
Posts: 439
Location: Little Rock, AR
|
| Posted: Sun Jul 29, 2007 5:30 am Post subject: |
|
|
| likewhoa wrote: | | they are not duplicate commands but just symbolic links to /sbin/lvm |
Sure enough ... I feel a bit idiotic now. ;)
| likewhoa wrote: | yes, use lvresize to both extend and reduce logical volumes.
just remember to fsck, fs {reduce,resize}, then lv{resize,reduce}. |
Cool. Thanks for you time.
_________________
"This Snow Crash thing -- is it a virus, a drug, or a religion?" "What's the difference?"
-- Neal Stephenson - Snow Crash |
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
|
Other Things Gentoo
