And, finally, an example of the problem:

[EMAIL PROTECTED]:/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
[EMAIL PROTECTED]:/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 
[EMAIL PROTECTED]:/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
[EMAIL PROTECTED]:/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
[EMAIL PROTECTED]:/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 
[EMAIL PROTECTED]:/var/lib/mysql/main$ date
Thu Jan 17 14:04:00 PST 2008
[EMAIL PROTECTED]:/var/lib/mysql/main$ sudo vgs
  VG         #PV #LV #SN Attr   VSize   VFree
  VolGroup00   4  10   7 wz--n- 370.28G 5.28G
[EMAIL PROTECTED]:/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
[EMAIL PROTECTED]:/var/lib/mysql/main$

-- 
"attempt to access beyond end of device" when creating LVM snapshot
https://bugs.launchpad.net/bugs/84821
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Bugs, which is the bug contact for Ubuntu.

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