Thanks for the response. The total size of the snap shots is 100Gb and I have deleted them so free space is now 300Gb on the volume.
DF -H RESULTS
Filesystem total used avail capacity Mounted on
/vol/vol0/ 12GB 2556MB 9731MB 21% /vol/vol0/
/vol/vol0/.snapshot 3072MB 0TB 3072MB 0% /vol/vol0/.snapshot
/vol/vol_igsq11uk_sql_sysdb/ 15GB 10226MB 5133MB 67% /vol/vol_igsq11uk_sql_sysdb/
/vol/vol_igsq11uk_sql_sysdb/.snapshot 0TB 0TB 0TB ---% /vol/vol_igsq11uk_sql_sysdb/.snapshot
/vol/vol_igsq11uk_sql_userdb/ 1536GB 1229GB 306GB 80% /vol/vol_igsq11uk_sql_userdb/
/vol/vol_igsq11uk_sql_userdb/.snapshot 0TB 0TB 0TB ---% /vol/vol_igsq11uk_sql_userdb/.snapshot
/vol/vol_igsq12uk_sql_logs/ 209GB 165GB 43GB 79% /vol/vol_igsq12uk_sql_logs/
/vol/vol_igsq12uk_sql_logs/.snapshot 0GB 34GB 0GB ---% /vol/vol_igsq12uk_sql_logs/.snapshot
/vol/vol_igsq11uk_sql_snapinfo/ 391GB 250GB 140GB 64% /vol/vol_igsq11uk_sql_snapinfo/
/vol/vol_igsq11uk_sql_snapinfo/.snapshot 0MB 311MB 0MB ---% /vol/vol_igsq11uk_sql_snapinfo/.snapshot
/vol/vol_igdc01uk_vfiler_root/ 9420MB 54MB 9366MB 1% /vol/vol_igdc01uk_vfiler_root/
/vol/vol_igdc01uk_vfiler_root/.snapshot 819MB 52MB 766MB 6% /vol/vol_igdc01uk_vfiler_root/.snapshot
/vol/vol_igdc01uk_cifs_data/ 1288GB 1131GB 157GB 88% /vol/vol_igdc01uk_cifs_data/
/vol/vol_igdc01uk_cifs_data/.snapshot 175GB 102GB 72GB 59% /vol/vol_igdc01uk_cifs_data/.snapshot
/vol/vol_igdc01uk_users_data/ 70GB 47GB 23GB 67% /vol/vol_igdc01uk_users_data/
/vol/vol_igdc01uk_users_data/.snapshot 4608MB 316MB 4291MB 7% /vol/vol_igdc01uk_users_data/.snapshot
/vol/vol_igsq11uk_sql_dba/ 57GB 50GB 7749MB 87% /vol/vol_igsq11uk_sql_dba/
/vol/vol_igsq11uk_sql_dba/.snapshot 0TB 0TB 0TB ---% /vol/vol_igsq11uk_sql_dba/.snapshot
/vol/vol_igsq11uk_sql_tempdb/ 60GB 51GB 9171MB 85% /vol/vol_igsq11uk_sql_tempdb/
/vol/vol_igsq11uk_sql_tempdb/.snapshot 0TB 0TB 0TB ---% /vol/vol_igsq11uk_sql_tempdb/.snapshot
/vol/sdw_cl_vol_igsq12uk_sql_logs_0/ 209GB 131GB 77GB 63% /vol/sdw_cl_vol_igsq12uk_sql_logs_0/
/vol/sdw_cl_vol_igsq12uk_sql_logs_0/.snapshot 0MB 11MB 0MB ---% /vol/sdw_cl_vol_igsq12uk_sql_logs_0/.snapshot
/vol/sdw_cl_vol_igsq12uk_sql_logs_1/ 209GB 131GB 77GB 63% /vol/sdw_cl_vol_igsq12uk_sql_logs_1/
/vol/sdw_cl_vol_igsq12uk_sql_logs_1/.snapshot 0MB 20MB 0MB ---% /vol/sdw_cl_vol_igsq12uk_sql_logs_1/.snapshot
DF -RH RESULTS
Filesystem total used avail reserved Mounted on
/vol/vol0/ 12GB 2547MB 9740MB 0MB /vol/vol0/
/vol/vol0/.snapshot 3072MB 0TB 3072MB 0MB /vol/vol0/.snapshot
/vol/vol_igsq11uk_sql_sysdb/ 15GB 10226MB 5133MB 0MB /vol/vol_igsq11uk_sql_sysdb/
/vol/vol_igsq11uk_sql_sysdb/.snapshot 0TB 0TB 0TB 0TB /vol/vol_igsq11uk_sql_sysdb/.snapshot
/vol/vol_igsq11uk_sql_userdb/ 1536GB 1229GB 306GB 0GB /vol/vol_igsq11uk_sql_userdb/
/vol/vol_igsq11uk_sql_userdb/.snapshot 0TB 0TB 0TB 0TB /vol/vol_igsq11uk_sql_userdb/.snapshot
/vol/vol_igsq12uk_sql_logs/ 209GB 165GB 43GB 0GB /vol/vol_igsq12uk_sql_logs/
/vol/vol_igsq12uk_sql_logs/.snapshot 0GB 34GB 0GB 0GB /vol/vol_igsq12uk_sql_logs/.snapshot
/vol/vol_igsq11uk_sql_snapinfo/ 391GB 250GB 140GB 0GB /vol/vol_igsq11uk_sql_snapinfo/
/vol/vol_igsq11uk_sql_snapinfo/.snapshot 0MB 311MB 0MB 0MB /vol/vol_igsq11uk_sql_snapinfo/.snapshot
/vol/vol_igdc01uk_vfiler_root/ 9420MB 54MB 9366MB 0MB /vol/vol_igdc01uk_vfiler_root/
/vol/vol_igdc01uk_vfiler_root/.snapshot 819MB 52MB 766MB 0MB /vol/vol_igdc01uk_vfiler_root/.snapshot
/vol/vol_igdc01uk_cifs_data/ 1288GB 1131GB 157GB 0GB /vol/vol_igdc01uk_cifs_data/
/vol/vol_igdc01uk_cifs_data/.snapshot 175GB 102GB 72GB 0GB /vol/vol_igdc01uk_cifs_data/.snapshot
/vol/vol_igdc01uk_users_data/ 70GB 47GB 23GB 0GB /vol/vol_igdc01uk_users_data/
/vol/vol_igdc01uk_users_data/.snapshot 4608MB 316MB 4291MB 0MB /vol/vol_igdc01uk_users_data/.snapshot
/vol/vol_igsq11uk_sql_dba/ 57GB 50GB 7749MB 0MB /vol/vol_igsq11uk_sql_dba/
/vol/vol_igsq11uk_sql_dba/.snapshot 0TB 0TB 0TB 0TB /vol/vol_igsq11uk_sql_dba/.snapshot
/vol/vol_igsq11uk_sql_tempdb/ 60GB 51GB 9171MB 0MB /vol/vol_igsq11uk_sql_tempdb/
/vol/vol_igsq11uk_sql_tempdb/.snapshot 0TB 0TB 0TB 0TB /vol/vol_igsq11uk_sql_tempdb/.snapshot
/vol/sdw_cl_vol_igsq12uk_sql_logs_0/ 209GB 131GB 77GB 0GB /vol/sdw_cl_vol_igsq12uk_sql_logs_0/
/vol/sdw_cl_vol_igsq12uk_sql_logs_0/.snapshot 0MB 11MB 0MB 0MB /vol/sdw_cl_vol_igsq12uk_sql_logs_0/.snapshot
/vol/sdw_cl_vol_igsq12uk_sql_logs_1/ 209GB 131GB 77GB 0GB /vol/sdw_cl_vol_igsq12uk_sql_logs_1/
/vol/sdw_cl_vol_igsq12uk_sql_logs_1/.snapshot 0MB 20MB 0MB 0MB /vol/sdw_cl_vol_igsq12uk_sql_logs_1/.snapshot
lun show /vol/vol_igsq11uk_sql_userdb/igsq11uk_sql_userdb
/vol/vol_igsq11uk_sql_userdb/igsq11uk_sql_userdb 1.2t (1319540544000) (r/w, online, mapped)
Cheers