Here is the backup log showing a dump to null and a dump to tape via networker
df -h BACKUP_TESTING
Filesystem total used avail capacity Mounted on
/vol/BACKUP_TESTING/ 40GB 11GB 28GB 29% /vol/BACKUP_TESTING/
/vol/BACKUP_TESTING/.snapshot 10GB 19GB 0KB 191% /vol/BACKUP_TESTING/.snapshot
dump to null takes 0:00:57
dmp Wed Aug 17 10:52:26 BST [uninitialized](0) Log_msg (creating "/vol/BACKUP_TESTING/../snapshot_for_backup.7278" snapshot.)
dmp Wed Aug 17 10:52:28 BST /vol/BACKUP_TESTING/(0) Log_msg (Using Full Volume Dump )
dmp Wed Aug 17 10:52:34 BST /vol/BACKUP_TESTING/(0) Start (Level 0)
dmp Wed Aug 17 10:52:34 BST /vol/BACKUP_TESTING/(0) Options (b=63)
dmp Wed Aug 17 10:52:34 BST /vol/BACKUP_TESTING/(0) Snapshot (snapshot_for_backup.7278, Wed Aug 17 10:52:26 BST)
dmp Wed Aug 17 10:52:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Dumping tape file 1 on null)
dmp Wed Aug 17 10:52:34 BST /vol/BACKUP_TESTING/(0) Tape_open (null)
dmp Wed Aug 17 10:52:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Date of this level 0 dump: Wed Aug 17 10:52:26 2011.)
dmp Wed Aug 17 10:52:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Date of last level 0 dump: the epoch.)
dmp Wed Aug 17 10:52:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Dumping /vol/BACKUP_TESTING to null)
dmp Wed Aug 17 10:52:34 BST /vol/BACKUP_TESTING/(0) Log_msg (mapping (Pass I)[regular files] )
dmp Wed Aug 17 10:52:34 BST /vol/BACKUP_TESTING/(0) Phase_change (I)
dmp Wed Aug 17 10:52:39 BST /vol/BACKUP_TESTING/(0) Log_msg (mapping (Pass II)[directories])
dmp Wed Aug 17 10:52:39 BST /vol/BACKUP_TESTING/(0) Phase_change (II)
dmp Wed Aug 17 10:52:42 BST /vol/BACKUP_TESTING/(0) Log_msg (estimated 3370608 KB.)
dmp Wed Aug 17 10:52:42 BST /vol/BACKUP_TESTING/(0) Log_msg (dumping (Pass III) [directories])
dmp Wed Aug 17 10:52:42 BST /vol/BACKUP_TESTING/(0) Phase_change (III)
dmp Wed Aug 17 10:52:44 BST /vol/BACKUP_TESTING/(0) Log_msg (dumping (Pass IV) [regular files])
dmp Wed Aug 17 10:52:44 BST /vol/BACKUP_TESTING/(0) Phase_change (IV)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (dumping (Pass V) [ACLs])
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Phase_change (V)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Tape_close (null)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (3373119 KB)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) End (3294 MB)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (DUMP IS DONE)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (reg inodes: 649 other inodes: 0 dirs: 111 nt dirs: 182 nt inodes: 184 acls: 47)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 1 time: 5276)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 3: directories dumped: 294)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 3: wafl directory blocks read: 297)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 3: average wafl directory blocks per inode: 1)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 3: average tape blocks per inode: 2)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 3 throughput (MB sec): read 1 write 0)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Percent of phase3 time spent for: reading inos 0% dumping ino 24%)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Percent of phase3 dump time spent for: convert-wafl-dirs 22% lev0-ra 0%)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 3 averages (usec): wafl load buf time 760 level 0 ra time 10)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 4: inodes dumped: 833)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 4: wafl data blocks read: 840844)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 4: average wafl data blocks per inode: 1009)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 4: average tape data blocks per inode: 4035)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 4 throughput (MB sec): read 94 write 94)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Percent of phase4 time spent for: reading inos 0% dumping inos 98%)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Tape write times (msec): average: 0 max: 9)
dmp Wed Aug 17 10:53:21 BST /vol/BACKUP_TESTING/(0) Log_msg (Tape changes: 1)
dmp Wed Aug 17 10:53:23 BST /vol/BACKUP_TESTING/(0) Log_msg (Deleting "/vol/BACKUP_TESTING/../snapshot_for_backup.7278" snapshot.)
Dump to tape via networker takes 0:05:10
dmp Wed Aug 17 10:59:28 BST [uninitialized](0) Log_msg (creating "/vol/BACKUP_TESTING/../snapshot_for_backup.7279" snapshot.)
dmp Wed Aug 17 10:59:31 BST /vol/BACKUP_TESTING/(0) Log_msg (Using Full Volume Dump )
dmp Wed Aug 17 10:59:35 BST /vol/BACKUP_TESTING/(0) Start (Level 0, NDMP)
dmp Wed Aug 17 10:59:35 BST /vol/BACKUP_TESTING/(0) Options (b=128, u)
dmp Wed Aug 17 10:59:35 BST /vol/BACKUP_TESTING/(0) Snapshot (snapshot_for_backup.7279, Wed Aug 17 10:59:28 BST)
dmp Wed Aug 17 10:59:35 BST /vol/BACKUP_TESTING/(0) Tape_open (ndmp)
dmp Wed Aug 17 10:59:36 BST /vol/BACKUP_TESTING/(0) Log_msg (Date of this level 0 dump: Wed Aug 17 10:59:28 2011.)
dmp Wed Aug 17 10:59:36 BST /vol/BACKUP_TESTING/(0) Log_msg (Date of last level 0 dump: the epoch.)
dmp Wed Aug 17 10:59:36 BST /vol/BACKUP_TESTING/(0) Log_msg (Dumping /vol/BACKUP_TESTING to NDMP connection)
dmp Wed Aug 17 10:59:36 BST /vol/BACKUP_TESTING/(0) Log_msg (mapping (Pass I)[regular files] )
dmp Wed Aug 17 10:59:36 BST /vol/BACKUP_TESTING/(0) Phase_change (I)
dmp Wed Aug 17 10:59:40 BST /vol/BACKUP_TESTING/(0) Log_msg (mapping (Pass II)[directories])
dmp Wed Aug 17 10:59:40 BST /vol/BACKUP_TESTING/(0) Phase_change (II)
dmp Wed Aug 17 10:59:42 BST /vol/BACKUP_TESTING/(0) Log_msg (estimated 3370608 KB.)
dmp Wed Aug 17 10:59:42 BST /vol/BACKUP_TESTING/(0) Log_msg (dumping (Pass III) [directories])
dmp Wed Aug 17 10:59:42 BST /vol/BACKUP_TESTING/(0) Phase_change (III)
dmp Wed Aug 17 10:59:49 BST /vol/BACKUP_TESTING/(0) Log_msg (dumping (Pass IV) [regular files])
dmp Wed Aug 17 10:59:49 BST /vol/BACKUP_TESTING/(0) Phase_change (IV)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (dumping (Pass V) [ACLs])
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Phase_change (V)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Tape_close (ndmp)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (3437246 KB)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) End (3356 MB)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (DUMP IS DONE)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (reg inodes: 649 other inodes: 0 dirs: 111 nt dirs: 182 nt inodes: 184 acls: 47)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 1 time: 3958)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 3: directories dumped: 294)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 3: wafl directory blocks read: 297)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 3: average wafl directory blocks per inode: 1)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 3: average tape blocks per inode: 2)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 3 throughput (MB sec): read 1 write 0)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Percent of phase3 time spent for: reading inos 0% dumping ino 28%)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Percent of phase3 dump time spent for: convert-wafl-dirs 27% lev0-ra 0%)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 3 averages (usec): wafl load buf time 808 level 0 ra time 10)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 4: inodes dumped: 833)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 4: wafl data blocks read: 840844)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 4: average wafl data blocks per inode: 1009)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 4: average tape data blocks per inode: 4035)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Phase 4 throughput (MB sec): read 12 write 12)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Percent of phase4 time spent for: reading inos 0% dumping inos 99%)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (# buffers of filehistory sent dir: 0 node: 0 mixed: 1)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (# times filehistory send was blocked dir: 0 node: 0)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (# filehistory flush operations dir: 0 node: 1)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (# filehistory entries dir: 984 node: 761 )
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Dir to FH entry time stats (msec) numEntries: 984 min: 0 max: 0 avg: 0 tot: 0)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Node to FH Entry time stats (msec) numEntries: 761 min: 0 max: 1 avg: <1 tot: 1)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Dir FH to NDMP Entry Time Stats (msec) numEntries: 1 min: 6 max: 6 avg: 6 tot: 6)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Node FH to NDMP Entry Time Stats (msec) numEntries: 1 min: 43 max: 43 avg: 43 tot: 43)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Tape write times (msec): average: 0 max: 46)
dmp Wed Aug 17 11:04:34 BST /vol/BACKUP_TESTING/(0) Log_msg (Tape changes: 1)
dmp Wed Aug 17 11:04:38 BST /vol/BACKUP_TESTING/(0) Log_msg (Deleting "/vol/BACKUP_TESTING/../snapshot_for_backup.7279" snapshot.)