Kernel => 2.6.13 (dm-snapshot-bio_list-fix.patch patched) lvm version => LVM version: 2.02.01 (2005-11-23) Library version: 1.02.02 (2005-12-02) Driver version: 4.4.0 -bash-3.00# lvcreate -s -L3000 -n test2_1 /dev/VG01/test2 Rounding up size to full physical extent 2.94 GB Logical volume "test2_1" created -bash-3.00# lvcreate -s -L 3000 -n test2_2 /dev/VG01/test2 Rounding up size to full physical extent 2.94 GB Logical volume "test2_2" created -bash-3.00# lvcreate -s -L 3000 -n test2_3 /dev/VG01/test2 Rounding up size to full physical extent 2.94 GB Logical volume "test2_3" created lvs --segment -v ---------------------------------------------------------- Finding all logical volumes /dev/VG01/test2_3: read failed after 0 of 4096 at 0: Input/output error LV VG Attr Start SSize #Str Type Stripe Chunk lv1 VG01 -wi-ao 0 256.00M 1 linear 0 0 lv2 VG01 -wi-ao 0 1.00G 1 linear 0 0 lv3 VG01 -wi-a- 0 64.00M 1 linear 0 0 lv4 VG01 -wi-ao 0 512.00M 1 linear 0 0 lv5 VG01 -wi-ao 0 128.00M 1 linear 0 0 test2 VG01owi-ao 0 29.31G 1 linear 0 0 test2_1 VG01 swi-a- 0 2.94G 1 linear 0 8.00K test2_2 VG01 swi-a- 0 2.94G 1 linear 0 8.00K test2_3 VG01 Swi-I- 0 2.94G 1 linear 0 8.00K -bash-3.00# lvs -a /dev/VG01/test2_3: read failed after 0 of 4096 at 0: Inpu/output error LV VG Attr LSize Origin Snap% Move Log Copy% lv1 VG01 -wi-ao 256.00M lv2 VG01 -wi-ao 1.00G lv3 VG01 -wi-a- 64.00M lv4 VG01 -wi-ao 512.00M lv5 VG01 -wi-ao 128.00M test2 VG01 owi-ao 29.31G test2_1 VG01 swi-a- 2.94G test2 30.00 test2_2 VG01 swi-a- 2.94G test2 29.99 test2_3 VG01 Swi-I- 2.94G test2 100.00 lvscan ---------------------------------------------------------- /dev/VG01/test2_3: read failed after 0 of 4096 at 0: Input/output error ACTIVE '/dev/VG01/lv1' [256.00 MB] inherit ACTIVE '/dev/VG01/lv2' [1.00 GB] inherit ACTIVE '/dev/VG01/lv3' [64.00 MB] inherit ACTIVE '/dev/VG01/lv4' [512.00 MB] inherit ACTIVE '/dev/VG01lv5' [128.00 MB] inherit ACTIVE Original '/dev/VG01/test2' [29.31 GB] inherit ACTIVE Snapshot '/dev/VG01/test2_1' [2.94 GB] inherit ACTIVE Snapshot '/dev/VG01/test2_2' [2.94 GB] inherit ACTIVE Snapshot '/dev/VG01/test2_3' [2.94 GB] inherit dmesg after created ---------------------------------------------------------- attempt to access beyond end of device dm-11: rw=17, want=2271285024, limit=6160384 device-mapper: Error reading/writing snapshot device-mapper: snapshot is marked invalid dmesg after tried to mount ---------------------------------------------------------- printk: 1 messages suppressed. Buffer I/O error on device dm-12, logical block 0 Buffer I/O error on device dm-12, logical block 1 Buffer I/O error on device dm-12, logical block 2 Buffer I/O error on device dm-12, logical block 3 Buffer I/O error on device dm-12, logical block 4 Buffer I/O error on device dm-12, logical block 5 Buffer I/O error on device dm-12, logical block 6 Buffer I/O error on device dm-12, logical block 7 Buffer I/O error on device dm-12, logical block 0 Buffer I/O error on device dm-12, logical block 8 FAT: Unrecognized mount option "nouuid" or missing value I create snapshot while test2 is busy. (I/O origin volume) but even I stopped writing data (already got error), sometime it still happen. 1 out of 3 -bash-3.00# lvs -a /dev/VG01/test2_4: read failed after 0 of 4096 at 0: Input/output error /dev/VG01/test2_7: read failed after 0 of 4096 at 0: Input/output error /dev/VG01/test2_10: read failed after 0 of 4096 at 0: Input/output error lv1 VG01 -wi-ao 256.00M lv2 VG01 -wi-ao 1.00G lv3 VG01 -wi-a- 64.00M lv4 VG01 -wi-ao 512.00M lv5 VG01 -wi-ao 128.00M test2 VG01 owi-ao 29.31G test2_1 VG01 swi-a- 2.94G test2 38.28 test2_10 VG01 Swi-I- 2.94G test2 100.00 test2_2 VG01 swi-a- 2.94G test2 38.27 test2_3 VG01 swi-a- 2.94G test2 0.01 test2_4 VG01 Swi-I- 2.94G test2 100.00 test2_5 VG01 swi-a- 2.94G test2 0.00 test2_6 VG01 swi-a- 2.94G test2 0.00 test2_7 VG01 Swi-I- 2.94G test2 100.00 test2_8 VG01 swi-a- 2.94G test2 0.00 test2_9 VG01 swi-a- 2.94G test2 0.00 Rocky