You can check the volume by using show volumes command on management server and also check the volume state from the /opt/pang/log/pang.log on cache server(ce-x).
This is the example from management server using show volumes.
console# show volumes
Licensed volumes : 24
Volume name State Owner
/mnt/vol1 mounted ce-1
/mnt/vol2 mounted ce-1
/mnt/vol3 mounted ce-1
This is the example from ce-13 pang.log,
08-10-13 01:10:10.215, 9447 [cfsm:Statistics] int cfs_management_thread_c::process_event(filesystem_resolve_event_c*) Blade 8 replied: blade 8 returned mounted on volume 81
--> UP
vol owner 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16
1 8 DWN INT INT INT INT INT INT UP INT INT DWN DWN DWN INT DWN
08-10-13 01:10:10.218, 9447 [cfsm:Statistics] int cfs_management_thread_c::process_event(filesystem_resolve_event_c*) Blade 8 replied: blade 8 returned mounted_cmdb on volume 81
--> UPC
vol owner 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16
81 8 DWN DWN INT INT INT INT INT UPC INT INT INT INT DWN INT DWN
08-10-13 01:11:12.495, 9447 [cfsm:Statistics] int cfs_management_thread_c::process_event(filesystem_resolve_event_c*) Blade 2 requested: blade 8 to mount volume 1
--> ^UP
vol owner 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16
1 0 DWN INT INT INT INT INT INT ^UP INT INT INT INT DWN INT DWN
08-10-13 01:11:39.516, 9447 [cfsm:Statistics] int cfs_management_thread_c::process_event(filesystem_resolve_event_c*) Blade 8 replied: blade 8 returned mounted on volume 1
--> UP
vol owner 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16
1 8 DWN INT INT INT INT INT INT UP INT INT DWN DWN DWN INT DWN
08-10-13 01:25:00.664, 9447 [cfsm:Statistics] int cfs_management_thread_c::process_event(filesystem_resolve_event_c*) Blade 2 requested: blade 2 to un-mount volume 113
08-10-13 01:25:00.664, 9446 [cfs:Statistics] void filemanager_c::close_pending_volume_requests(u8) for vol id 113
--> vDN
vol owner 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16
113 255 DWN vDN INT INT INT INT INT DWN INT INT DWN DWN DWN INT DWN DWN
