[ZFS] Prompt, which is lost space in the ZFS pool?

[Vladislav V. Prodan]

FreeBSD 8.2-STABLE #0: Tue Jun 28 14:40:44 EEST 2011 amd64

# zpool list tank
NAME   SIZE  ALLOC   FREE    CAP  DEDUP  HEALTH  ALTROOT
tank  1,34T  1,08T   270G    80%  1.00x  ONLINE  -

# zdb tank

Cached configuration:
         version: 15
         name: 'tank'
         state: 0
         txg: 3933453
         pool_guid: 15415411259239146062
         hostid: 814717323
         hostname: 'second.xxx.com'
         vdev_tree:
             type: 'root'
             id: 0
             guid: 15415411259239146062
             children[0]:
                 type: 'mirror'
                 id: 0
                 guid: 16020562126957161505
                 whole_disk: 0
                 metaslab_array: 23
                 metaslab_shift: 33
                 ashift: 9
                 asize: 1483117166592
                 is_log: 0
                 children[0]:
                     type: 'disk'
                     id: 0
                     guid: 11217068100198816386
                     path: '/dev/gpt/disk0'
                     whole_disk: 0
                     DTL: 120
                 children[1]:
                     type: 'disk'
                     id: 1
                     guid: 4665162630340381592
                     path: '/dev/gpt/disk1'
                     whole_disk: 0
                     DTL: 118

MOS Configuration:
         version: 15
         name: 'tank'
         state: 0
         txg: 3933453
         pool_guid: 15415411259239146062
         hostid: 814717323
         hostname: 'second.xxx.com'
         vdev_tree:
             type: 'root'
             id: 0
             guid: 15415411259239146062
             children[0]:
                 type: 'mirror'
                 id: 0
                 guid: 16020562126957161505
                 whole_disk: 0
                 metaslab_array: 23
                 metaslab_shift: 33
                 ashift: 9
                 asize: 1483117166592
                 is_log: 0
                 children[0]:
                     type: 'disk'
                     id: 0
                     guid: 11217068100198816386
                     path: '/dev/gpt/disk0'
                     whole_disk: 0
                     DTL: 120
                 children[1]:
                     type: 'disk'
                     id: 1
                     guid: 4665162630340381592
                     path: '/dev/gpt/disk1'
                     whole_disk: 0
                     DTL: 118

#df -h
Filesystem                  Size    Used   Avail Capacity  Mounted on
tank                        249G    846M    249G     0%    /
devfs                       1.0k    1.0k      0B   100%    /dev
tank/backup                 646G    397G    249G    61%    /backup
tank/backup/router          256G    7.9G    249G     3%    /backup/router
tank/backup/third-server    626G    377G    249G    60% 
/backup/third-server
tank/home                   252G    3.2G    249G     1%    /home
tank/tmp                    249G     28M    249G     0%    /tmp
tank/usr                    251G    2.5G    249G     1%    /usr
tank/usr/home               249G     29k    249G     0%    /usr/home
tank/usr/ports              250G    1.1G    249G     0%    /usr/ports
tank/usr/src                249G    314M    249G     0%    /usr/src
tank/var                    249G    9.6M    249G     0%    /var
tank/var/crash              249G     21k    249G     0%    /var/crash
tank/var/db                 249G    158M    249G     0%    /var/db
tank/mysql                  250G    1.1G    249G     0%    /var/db/mysql
tank/mysql/ibdata           252G    3.2G    249G     1% 
/var/db/mysql/ibdata
tank/mysql/iblogs           249G     10M    249G     0% 
/var/db/mysql/iblogs
tank/var/log                249G    258M    249G     0%    /var/log
tank/var/mail               249G    734k    249G     0%    /var/mail
tank/var/run                249G    106k    249G     0%    /var/run
tank/var/tmp                249G     14M    249G     0%    /var/tmp
tank/www                    270G     21G    249G     8%    /www

zfs list-t snapshot shows the place occupied by no more than 30GB

Where lost about 600GB of free space?

-- 
Vladislav V. Prodan
VVP24-UANIC
+380[67]4584408
+380[99]4060508
vlad11 at jabber.ru