And, finally, an example of the problem: kornelak@npbbz:/var/lib/mysql/main$ dmesg|tail [17180786.720000] EXT3-fs: mounted filesystem with ordered data mode. [17180799.652000] kjournald starting. Commit interval 5 seconds [17180799.656000] EXT3 FS on dm-41, internal journal [17180799.656000] EXT3-fs: recovery complete. [17180799.656000] EXT3-fs: mounted filesystem with ordered data mode. [17203415.252000] ibm_acpi: ec object not found [17808026.704000] ibm_acpi: ec object not found [18412815.972000] ibm_acpi: ec object not found [19017364.116000] ibm_acpi: ec object not found [19622027.484000] ibm_acpi: ec object not found kornelak@npbbz:/var/lib/mysql/main$ sudo lvs LV VG Attr LSize Origin Snap% Move Log Copy% Database_Logs VolGroup00 -wi-ao 10.00G Database_Main VolGroup00 -wi-ao 5.00G Database_Stage_31743 VolGroup00 swi-a- 5.00G Database_Stage_Orig 0.00 Database_Stage_32781 VolGroup00 swi-a- 5.00G Database_Stage_Orig 0.00 Database_Stage_34352 VolGroup00 swi-a- 5.00G Database_Stage_Orig 0.00 Database_Stage_Orig VolGroup00 owi-ao 35.00G Database_Transition VolGroup00 -wi-ao 80.00G Home VolGroup00 -wi-a- 3.00G Live VolGroup00 -wi-ao 94.00G Root VolGroup00 -wi-a- 10.00G Stage_31743 VolGroup00 swi-a- 5.00G Stage_Orig 0.00 Stage_32781 VolGroup00 swi-a- 5.00G Stage_Orig 0.00 Stage_34352 VolGroup00 swi-a- 5.00G Stage_Orig 0.00 Stage_Orig VolGroup00 owi-ao 76.00G Swap VolGroup00 -wi-ao 2.00G root VolGroup00 -wi-ao 15.00G kornelak@npbbz:/var/lib/mysql/main$ sudo lvcreate --verbose --snapshot --size 5G --name Database_Stage_35780 VolGroup00/Database_Stage_Orig Setting chunksize to 16 sectors. Finding volume group "VolGroup00" Archiving volume group "VolGroup00" metadata (seqno 485). Creating logical volume Database_Stage_35780 Creating volume group backup "/etc/lvm/backup/VolGroup00" (seqno 486). Found volume group "VolGroup00" Creating VolGroup00-Database_Stage_35780 Loading VolGroup00-Database_Stage_35780 table Resuming VolGroup00-Database_Stage_35780 (254:42) Zeroing start of logical volume "Database_Stage_35780" Found volume group "VolGroup00" Removing VolGroup00-Database_Stage_35780 (254:42) Found volume group "VolGroup00" Found volume group "VolGroup00" Found volume group "VolGroup00" Loading VolGroup00-Database_Stage_Orig-real table Suppressed VolGroup00-Database_Stage_Orig-real identical table reload. Loading VolGroup00-Database_Stage_Orig table Suppressed VolGroup00-Database_Stage_Orig identical table reload. Loading VolGroup00-Database_Stage_31743-cow table Suppressed VolGroup00-Database_Stage_31743-cow identical table reload. Loading VolGroup00-Database_Stage_31743 table Suppressed VolGroup00-Database_Stage_31743 identical table reload. Loading VolGroup00-Database_Stage_32781-cow table Suppressed VolGroup00-Database_Stage_32781-cow identical table reload. Loading VolGroup00-Database_Stage_32781 table Suppressed VolGroup00-Database_Stage_32781 identical table reload. Loading VolGroup00-Database_Stage_34352-cow table Suppressed VolGroup00-Database_Stage_34352-cow identical table reload. Loading VolGroup00-Database_Stage_34352 table Suppressed VolGroup00-Database_Stage_34352 identical table reload. Creating VolGroup00-Database_Stage_35780-cow Loading VolGroup00-Database_Stage_35780-cow table Resuming (254:42) Creating VolGroup00-Database_Stage_35780 Loading VolGroup00-Database_Stage_35780 table Suspending VolGroup00-Database_Stage_Orig (254:9) with filesystem sync. Suspending VolGroup00-Database_Stage_31743 (254:33) with filesystem sync. Suspending VolGroup00-Database_Stage_32781 (254:35) with filesystem sync. Suspending VolGroup00-Database_Stage_34352 (254:41) with filesystem sync. Suspending VolGroup00-Database_Stage_Orig-real (254:31) with filesystem sync. Suspending VolGroup00-Database_Stage_31743-cow (254:32) with filesystem sync. Suspending VolGroup00-Database_Stage_Orig-real (254:31) with filesystem sync. Suspending VolGroup00-Database_Stage_32781-cow (254:34) with filesystem sync. Suspending VolGroup00-Database_Stage_Orig-real (254:31) with filesystem sync. Suspending VolGroup00-Database_Stage_34352-cow (254:40) with filesystem sync. Suspending VolGroup00-Database_Stage_Orig-real (254:31) with filesystem sync. Found volume group "VolGroup00" Loading VolGroup00-Database_Stage_Orig-real table Suppressed VolGroup00-Database_Stage_Orig-real identical table reload. Resuming VolGroup00-Database_Stage_Orig-real (254:31) Loading VolGroup00-Database_Stage_Orig table Suppressed VolGroup00-Database_Stage_Orig identical table reload. Loading VolGroup00-Database_Stage_31743-cow table Suppressed VolGroup00-Database_Stage_31743-cow identical table reload. Resuming VolGroup00-Database_Stage_31743-cow (254:32) Loading VolGroup00-Database_Stage_31743 table Suppressed VolGroup00-Database_Stage_31743 identical table reload. Loading VolGroup00-Database_Stage_32781-cow table Suppressed VolGroup00-Database_Stage_32781-cow identical table reload. Resuming VolGroup00-Database_Stage_32781-cow (254:34) Loading VolGroup00-Database_Stage_32781 table Suppressed VolGroup00-Database_Stage_32781 identical table reload. Loading VolGroup00-Database_Stage_34352-cow table Suppressed VolGroup00-Database_Stage_34352-cow identical table reload. Resuming VolGroup00-Database_Stage_34352-cow (254:40) Loading VolGroup00-Database_Stage_34352 table Suppressed VolGroup00-Database_Stage_34352 identical table reload. Loading VolGroup00-Database_Stage_35780-cow table Suppressed VolGroup00-Database_Stage_35780-cow identical table reload. Resuming VolGroup00-Database_Stage_31743 (254:33) Resuming VolGroup00-Database_Stage_32781 (254:35) Resuming VolGroup00-Database_Stage_34352 (254:41) Resuming VolGroup00-Database_Stage_35780 (254:43) Resuming VolGroup00-Database_Stage_Orig (254:9) Creating volume group backup "/etc/lvm/backup/VolGroup00" (seqno 487). Logical volume "Database_Stage_35780" created kornelak@npbbz:/var/lib/mysql/main$ dmesg|tail [17180799.656000] EXT3-fs: mounted filesystem with ordered data mode. [17203415.252000] ibm_acpi: ec object not found [17808026.704000] ibm_acpi: ec object not found [18412815.972000] ibm_acpi: ec object not found [19017364.116000] ibm_acpi: ec object not found [19622027.484000] ibm_acpi: ec object not found [19995004.724000] attempt to access beyond end of device [19995004.724000] dm-42: rw=17, want=1463812128, limit=10485760 [19995004.724000] device-mapper: Error reading/writing snapshot [19995004.856000] device-mapper: snapshot is marked invalid kornelak@npbbz:/var/lib/mysql/main$ sudo lvs LV VG Attr LSize Origin Snap% Move Log Copy% Database_Logs VolGroup00 -wi-ao 10.00G Database_Main VolGroup00 -wi-ao 5.00G Database_Stage_31743 VolGroup00 swi-a- 5.00G Database_Stage_Orig 0.00 Database_Stage_32781 VolGroup00 swi-a- 5.00G Database_Stage_Orig 0.00 Database_Stage_34352 VolGroup00 swi-a- 5.00G Database_Stage_Orig 0.00 Database_Stage_35780 VolGroup00 Swi-I- 5.00G Database_Stage_Orig 100.00 Database_Stage_Orig VolGroup00 owi-ao 35.00G Database_Transition VolGroup00 -wi-ao 80.00G Home VolGroup00 -wi-a- 3.00G Live VolGroup00 -wi-ao 94.00G Root VolGroup00 -wi-a- 10.00G Stage_31743 VolGroup00 swi-a- 5.00G Stage_Orig 0.00 Stage_32781 VolGroup00 swi-a- 5.00G Stage_Orig 0.00 Stage_34352 VolGroup00 swi-a- 5.00G Stage_Orig 0.00 Stage_Orig VolGroup00 owi-ao 76.00G Swap VolGroup00 -wi-ao 2.00G root VolGroup00 -wi-ao 15.00G kornelak@npbbz:/var/lib/mysql/main$ date Thu Jan 17 14:04:00 PST 2008 kornelak@npbbz:/var/lib/mysql/main$ sudo vgs VG #PV #LV #SN Attr VSize VFree VolGroup00 4 10 7 wz--n- 370.28G 5.28G kornelak@npbbz:/var/lib/mysql/main$ sudo pvs PV VG Fmt Attr PSize PFree /dev/sda2 VolGroup00 lvm2 a- 9.88G 0 /dev/sdb VolGroup00 lvm2 a- 99.97G 992.00M /dev/sdd2 VolGroup00 lvm2 a- 23.47G 3.34G /dev/sde1 VolGroup00 lvm2 a- 236.97G 992.00M kornelak@npbbz:/var/lib/mysql/main$