Boyd Stephen Smith Jr. wrote:
On Wednesday 2008 December 17 23:30:04 M.Lewis wrote:
Boyd Stephen Smith Jr. wrote:
On Wednesday 2008 December 17 23:00:41 M.Lewis wrote:
Given a Lenny LVM setup as follows:
Is it possible to reorganize the current LVM to separate out say /var &
/tmp into their on LV?
Any free space on the VG? Or, can you make some by shrinking one of the
filesystems and then shrinking it's associated VG?
No, free space is all used in LVs. Yes, I can shrink /home easily by
10-20GB.
Then, I'd:
--- Prep ---
1. Go down to or boot into single-user mode.
2. Unmount /home
3. Size down /home and then rattler/home
4. Optional: make sure the /home filesystem is still fine -- at this point
reverting the lv shrinking is fairly easy.
---
5. Make new lvs for /var and /tmp. (BTW, if you have 1G or more, you might
just put /tmp on tmpfs.)
6. Make the new filesystems for /var and /tmp.
7. If possible, remount / read-only. If writing isbeing done to files in the
old /var or /tmp during or after the rsync, you'll lose some of that data
8. Mount the new /var and /tmp in the right place.
--- Data Migration ---
9. Mount with -o bind / on /mnt.
10. Rsync /mnt/var/. to /var and /mnt/tmp/. to /tmp.
11. rm -rf /mnt/{var,tmp}/{.[!.],}*
12. Umount /mnt.
--- Finishing touches --
13. Add new /var and /tmp to /etc/fstab.
14. Reboot normally or simply walk the system up to your normal multi-user run
level.
For those that might have been following this thread, the process has
been completed now and all went well. Many thanks to Boyd for the
detailed explanations along the way.
This was all brought about my my stupidly selecting auto-partitioning
with a separate /home during the install.
The detailed steps follow (hopefully the wrapping doesn't screw up):
Boot the machine with the Knoppix Live CD
Open a shell window.
Become root.
lvm vgchange --ignorelockingfailure -P -a y # this is done to make the
vg 'live' on the target machine
e2fsck -f /dev/curley/home # check consistency before starting (may be
required by resize2fs?)
resize2fs /dev/curley/home 30G # change the size of (fs)
/dev/curley/home from whatever it is, to 30GB
lvreduce -L 30G /dev/curley/home # change the size of the lv to
30G
lvcreate -L8500M -nvar curley # make 1/2 of the new space
into lv var
lvcreate -L8500M -ntmp curley # make 1/2 of the new space
into lv tmp
mkfs.ext3 -j /dev/curley/var # format the new var fs
mkfs.ext3 -j /dev/curley/tmp # format the new tmp fs
mkdir /mnt/root # make a mounting point for the
root fs
mkdir /mnt/newtmp # make a mounting point for the
new tmp fs
mkdir /mnt/newvar # make a mounting point for the
new var fs
mount /dev/curley/root /mnt/root # mount the root fs of the
target drive
mount /dev/curley/var /mnt/newvar # mount the new var fs
mount /dev/curley/tmp /mnt/newtmp # mount the new tmp fs
rsync -avH /mnt/root/var/* /mnt/newvar # rsync oldvar to newvar
rsync -avH /mnt/root/tmp/* /mnt/newtmp # rsync oldtmp to newtmp
rm -fr /mnt/root/var # remove old /var
rm -fr /mnt/root/tmp # remove old /tmp
edit /mnt/root/etc/fstab # add the new var & tmp
mountings to /etc/fstab
mkdir /mnt/root/tmp # I'm not sure why this was
necessary
chmod 1777 /mnt/root/tmp # change the perms for /tmp
--
LISP: To call a spade a thpade.
00:45:01 up 5 days, 22 min, 1 user, load average: 0.00, 0.04, 0.01
Linux Registered User #241685 http://counter.li.org
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