2009-11-17 02:47 PM
I've recently moved a volume (and all snapshots) from one aggregate to another using "vol copy -S". Everything went smoothly. (The volume is used as a SnapVault target).
However, when i do a "df -V -h" I notice that the new volume shows a capacity of 35% but the old shows 53% !?! The "used" for the volumes, as well as for their snapshots, are identical. But the "avail" is different, and hence the "capacity" as well.
Filesystem total used avail capacity Mounted on
/vol/sv_eBackup04_old/ 4096GB 1427GB 1929GB 53% /vol/sv_eBackup04_old/
/vol/sv_eBackup04_old/.snapshot 0GB 309GB 0GB ---% /vol/sv_eBackup04_old/.snapshot
/vol/sv_eBackup04/ 4096GB 1427GB 2668GB 35% /vol/sv_eBackup04/
/vol/sv_eBackup04/.snapshot 0GB 309GB 0GB ---% /vol/sv_eBackup04/.snapshot
Why is this so? What are the extra space used for in the original volume? And is their a way to "reclaim" this space in other volumes as well without doing a vol copy? Or am I missing something obvious?
Any hints appreciated.
2010-02-04 04:30 PM
Please check the fractional reserve on the source and the destination volumes.
The fractional reserve on the source volume would be higher and hence it shows more space as consumed with the same amount of actual data