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