[linux-lvm] multiple snapshots and deactivate

[Dominique Frise <Dominique.Frise@unil.ch>]

Hi,

Our system RHEL4:
	# uname -r
	2.6.9-22.EL
	# rpm -qa | grep lvm
	system-config-lvm-1.0.16-1.0
	lvm2-2.02.01-1.3.RHEL4


We would like to make up to 8 snapshots/day of the same original LV.
To be able to keep all the snapshots for an entire day, we thougt that we could 
deactivate a snapshot before creating a new active one.

----current VG/LV config----
# lvdisplay
   --- Logical volume ---
   LV Name                /dev/vg1/lv1
   VG Name                vg1
   LV UUID                SjIv1d-XedO-o9mZ-7EKa-zNcj-bX6m-BhfAZQ
   LV Write Access        read/write
   LV snapshot status     source of
                          /dev/vg1/snap1 [active]
   LV Status              available
   # open                 1
   LV Size                3.16 GB
   Current LE             810
   Segments               1
   Allocation             inherit
   Read ahead sectors     0
   Block device           253:0

   --- Logical volume ---
   LV Name                /dev/vg1/snap1
   VG Name                vg1
   LV UUID                U7DjZJ-HTDZ-5L0P-QxWD-moxK-KqRG-o03wQf
   LV Write Access        read/write
   LV snapshot status     active destination for /dev/vg1/lv1
   LV Status              available
   # open                 0
   LV Size                3.16 GB
   Current LE             810
   COW-table size         424.00 MB
   COW-table LE           106
   Allocated to snapshot  47.46%
   Snapshot chunk size    8.00 KB
   Segments               1
   Allocation             inherit
   Read ahead sectors     0
   Block device           253:3
--------------------------------


Using lvchange to deactivate the current snapshot reports errors:-(

# lvchange -v -an /dev/vg1/snap1
     Using logical volume(s) on command line
   Can't change snapshot logical volume "snap1"


Are we missing something?