[linux-lvm] Backup of ROOT Partition.

Jean-Philippe Villeneuve jeepii at globetrotter.net
Wed Jul 16 21:03:21 UTC 2008

I tried the folowing recipe: 
http://tldp.org/HOWTO/LVM-HOWTO/snapshots_backup.html with the folowing 


lvcreate -L592M -s -n $BAKLVMNAME  /dev/VolGroup00/LogVol00
mount /dev/VolGroup00/$BAKLVMNAME /mnt/sysbackup/ -o ro
cd /mnt/sysbackup
time tar -cjvpf /mnt/serveur/backSysVol.bz2 *
cd ..
umount /mnt/sysbackup
lvremove -f /dev/VolGroup00/$BAKLVMNAME


I get the folowing error:
  Rounding up size to full physical extent 608.00 MB
  Insufficient free extents (1) in volume group VolGroup00: 19 required

It works find if I do it with -L20M.
How do I change the LogicalVolumeSize?

according to 'df' I have plenty of space for data.

# df -h
Filesystem            Size  Used Avail Use% Mounted on
                       35G  6.0G   27G  19% /
/dev/md0              677G  270G  373G  42% /mnt/serveur
/dev/sda1             190M   26M  155M  15% /boot
tmpfs                 374M     0  374M   0% /dev/shm

Am I missing something?

Jean-Philippe Villeneuve wrote:
> Bryan Kadzban wrote:
>> Hash: RIPEMD160
>> Jean-Philippe Villeneuve wrote:
>>> I would like to know if I can backup all my system partitions(ROOT 
>>> included) using a snapshot?
>> Depends on what you mean by "backup [...] using a snapshot".
>> If you mean taking a snapshot, then mounting it somewhere and pointing
>> your backup software to that mount point, then unmounting and deleting
>> the snapshot after the backup is done, then yes, it should work fine.
> This is exactly what I want to do.  I just want the latest 
> configuration, users files etc. I realy don't need files at a specific 
> date with tons of backups.
> Than you all for the fast and acurate answers.
> Jean-Philippe
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