On Jun 21, 2013, at 2:58 PM, Joseph L. Casale wrote:
So I have an XFS file system within LVM which has an external log.
A snapshot volume is created w/o issue;
But when i try to mount the file system; mount: /dev/mapper/vg_spock_data-datasnapshot already mounted or /snapshot busy
So the filesystem was built requiring an external log device? Let me guess, the original block device is still mounted and accessing its log device?
Bingo, you got it.
I did this for speed.
The log device is on a pair of mirrored SSD drives I had lying around.
Might as well put em to use.
I have a feeling that freezing the XFS filesystem while a snapshot is made is the way to fix this.
However while I have tested freezing and XFS volume, I am a little shy on doing it on a live production system.
I'll wait until the weekend midnight.
It should be fast;
1) freeze 2) snap shot it 3) mount the snap shot 4) unfreeze 5) do my rsnapshot 6) then unmount and remove the snap shot volume
What do you think?
- aurf