the /var/log/syslog:

Feb  1 09:02:26 ubuntu kernel: [17180728.708000] sd 0:0:0:0: SCSI error: return code = 0x8000002
Feb  1 09:02:26 ubuntu kernel: [17180728.708000] sda: Current: sense key: Medium Error
Feb  1 09:02:26 ubuntu kernel: [17180728.708000]     Additional sense: Unrecovered read error - auto reallocate failed
Feb  1 09:02:26 ubuntu kernel: [17180728.708000] end_request: I/O error, dev sda, sector 483636195
Feb  1 09:02:27 ubuntu kernel: [17180730.100000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:27 ubuntu kernel: [17180730.100000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:27 ubuntu kernel: [17180730.100000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:29 ubuntu kernel: [17180731.408000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:29 ubuntu kernel: [17180731.408000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:29 ubuntu kernel: [17180731.408000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:30 ubuntu kernel: [17180732.716000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:30 ubuntu kernel: [17180732.716000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:30 ubuntu kernel: [17180732.716000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:31 ubuntu kernel: [17180734.024000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:31 ubuntu kernel: [17180734.024000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:31 ubuntu kernel: [17180734.024000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:33 ubuntu kernel: [17180735.332000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:33 ubuntu kernel: [17180735.332000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:33 ubuntu kernel: [17180735.332000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:33 ubuntu kernel: [17180735.332000] sd 0:0:0:0: SCSI error: return code = 0x8000002
Feb  1 09:02:33 ubuntu kernel: [17180735.332000] sda: Current: sense key: Medium Error
Feb  1 09:02:33 ubuntu kernel: [17180735.332000]     Additional sense: Unrecovered read error - auto reallocate failed
Feb  1 09:02:33 ubuntu kernel: [17180735.332000] end_request: I/O error, dev sda, sector 483636203
Feb  1 09:02:34 ubuntu kernel: [17180736.500000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:34 ubuntu kernel: [17180736.500000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:34 ubuntu kernel: [17180736.500000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:35 ubuntu kernel: [17180737.708000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:35 ubuntu kernel: [17180737.708000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:35 ubuntu kernel: [17180737.708000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:36 ubuntu kernel: [17180738.800000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:36 ubuntu kernel: [17180738.800000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:36 ubuntu kernel: [17180738.800000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:37 ubuntu kernel: [17180739.892000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:37 ubuntu kernel: [17180739.892000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:37 ubuntu kernel: [17180739.892000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:39 ubuntu kernel: [17180741.932000] ata1: translated ATA stat/err 0x51/01 to SCSI SK/ASC/ASCQ 0x3/13/00
Feb  1 09:02:39 ubuntu kernel: [17180741.932000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:39 ubuntu kernel: [17180741.932000] ata1: error=0x01 { AddrMarkNotFound }
Feb  1 09:02:39 ubuntu kernel: [17180741.932000] sd 0:0:0:0: SCSI error: return code = 0x8000002
Feb  1 09:02:39 ubuntu kernel: [17180741.932000] sda: Current: sense key: Medium Error
Feb  1 09:02:39 ubuntu kernel: [17180741.932000]     Additional sense: Address mark not found for data field
Feb  1 09:02:39 ubuntu kernel: [17180741.932000] end_request: I/O error, dev sda, sector 483636211
Feb  1 09:02:41 ubuntu kernel: [17180743.324000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:41 ubuntu kernel: [17180743.324000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:41 ubuntu kernel: [17180743.324000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:42 ubuntu kernel: [17180744.632000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:42 ubuntu kernel: [17180744.632000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:42 ubuntu kernel: [17180744.632000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:43 ubuntu kernel: [17180745.856000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:43 ubuntu kernel: [17180745.856000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:43 ubuntu kernel: [17180745.856000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:45 ubuntu kernel: [17180747.164000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:45 ubuntu kernel: [17180747.164000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:45 ubuntu kernel: [17180747.164000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:46 ubuntu kernel: [17180748.472000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:46 ubuntu kernel: [17180748.472000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:46 ubuntu kernel: [17180748.472000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:46 ubuntu kernel: [17180748.472000] sd 0:0:0:0: SCSI error: return code = 0x8000002
Feb  1 09:02:46 ubuntu kernel: [17180748.472000] sda: Current: sense key: Medium Error
Feb  1 09:02:46 ubuntu kernel: [17180748.472000]     Additional sense: Unrecovered read error - auto reallocate failed
Feb  1 09:02:46 ubuntu kernel: [17180748.472000] end_request: I/O error, dev sda, sector 483636219
Feb  1 09:02:47 ubuntu kernel: [17180749.864000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:47 ubuntu kernel: [17180749.864000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:47 ubuntu kernel: [17180749.864000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:49 ubuntu kernel: [17180751.172000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:49 ubuntu kernel: [17180751.172000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:49 ubuntu kernel: [17180751.172000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:50 ubuntu kernel: [17180752.480000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:50 ubuntu kernel: [17180752.480000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:50 ubuntu kernel: [17180752.480000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:51 ubuntu kernel: [17180753.792000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:51 ubuntu kernel: [17180753.792000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:51 ubuntu kernel: [17180753.792000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:52 ubuntu kernel: [17180755.100000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:52 ubuntu kernel: [17180755.100000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:52 ubuntu kernel: [17180755.100000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:52 ubuntu kernel: [17180755.100000] sd 0:0:0:0: SCSI error: return code = 0x8000002
Feb  1 09:02:52 ubuntu kernel: [17180755.100000] sda: Current: sense key: Medium Error
Feb  1 09:02:52 ubuntu kernel: [17180755.100000]     Additional sense: Unrecovered read error - auto reallocate failed
Feb  1 09:02:52 ubuntu kernel: [17180755.100000] end_request: I/O error, dev sda, sector 483636227
Feb  1 09:02:55 ubuntu kernel: [17180757.688000] ata1: translated ATA stat/err 0x51/01 to SCSI SK/ASC/ASCQ 0x3/13/00
Feb  1 09:02:55 ubuntu kernel: [17180757.688000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:55 ubuntu kernel: [17180757.688000] ata1: error=0x01 { AddrMarkNotFound }
Feb  1 09:02:56 ubuntu kernel: [17180758.824000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:56 ubuntu kernel: [17180758.824000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:56 ubuntu kernel: [17180758.824000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:57 ubuntu kernel: [17180759.896000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:57 ubuntu kernel: [17180759.896000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:57 ubuntu kernel: [17180759.896000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:03:00 ubuntu kernel: [17180762.404000] ata1: translated ATA stat/err 0x51/01 to SCSI SK/ASC/ASCQ 0x3/13/00
Feb  1 09:03:00 ubuntu kernel: [17180762.404000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:03:00 ubuntu kernel: [17180762.404000] ata1: error=0x01 { AddrMarkNotFound }
Feb  1 09:03:02 ubuntu kernel: [17180764.904000] ata1: translated ATA stat/err 0x51/01 to SCSI SK/ASC/ASCQ 0x3/13/00
Feb  1 09:03:02 ubuntu kernel: [17180764.904000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:03:02 ubuntu kernel: [17180764.904000] ata1: error=0x01 { AddrMarkNotFound }
Feb  1 09:03:02 ubuntu kernel: [17180764.904000] sd 0:0:0:0: SCSI error: return code = 0x8000002
Feb  1 09:03:02 ubuntu kernel: [17180764.904000] sda: Current: sense key: Medium Error
Feb  1 09:03:02 ubuntu kernel: [17180764.904000]     Additional sense: Address mark not found for data field
Feb  1 09:03:02 ubuntu kernel: [17180764.904000] end_request: I/O error, dev sda, sector 483636235
ubuntu@ubuntu:~$ tail -100 /var/log/syslog
Feb  1 09:02:26 ubuntu kernel: [17180728.708000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:26 ubuntu kernel: [17180728.708000] sd 0:0:0:0: SCSI error: return code = 0x8000002
Feb  1 09:02:26 ubuntu kernel: [17180728.708000] sda: Current: sense key: Medium Error
Feb  1 09:02:26 ubuntu kernel: [17180728.708000]     Additional sense: Unrecovered read error - auto reallocate failed
Feb  1 09:02:26 ubuntu kernel: [17180728.708000] end_request: I/O error, dev sda, sector 483636195
Feb  1 09:02:27 ubuntu kernel: [17180730.100000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:27 ubuntu kernel: [17180730.100000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:27 ubuntu kernel: [17180730.100000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:29 ubuntu kernel: [17180731.408000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:29 ubuntu kernel: [17180731.408000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:29 ubuntu kernel: [17180731.408000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:30 ubuntu kernel: [17180732.716000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:30 ubuntu kernel: [17180732.716000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:30 ubuntu kernel: [17180732.716000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:31 ubuntu kernel: [17180734.024000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:31 ubuntu kernel: [17180734.024000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:31 ubuntu kernel: [17180734.024000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:33 ubuntu kernel: [17180735.332000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:33 ubuntu kernel: [17180735.332000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:33 ubuntu kernel: [17180735.332000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:33 ubuntu kernel: [17180735.332000] sd 0:0:0:0: SCSI error: return code = 0x8000002
Feb  1 09:02:33 ubuntu kernel: [17180735.332000] sda: Current: sense key: Medium Error
Feb  1 09:02:33 ubuntu kernel: [17180735.332000]     Additional sense: Unrecovered read error - auto reallocate failed
Feb  1 09:02:33 ubuntu kernel: [17180735.332000] end_request: I/O error, dev sda, sector 483636203
Feb  1 09:02:34 ubuntu kernel: [17180736.500000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:34 ubuntu kernel: [17180736.500000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:34 ubuntu kernel: [17180736.500000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:35 ubuntu kernel: [17180737.708000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:35 ubuntu kernel: [17180737.708000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:35 ubuntu kernel: [17180737.708000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:36 ubuntu kernel: [17180738.800000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:36 ubuntu kernel: [17180738.800000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:36 ubuntu kernel: [17180738.800000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:37 ubuntu kernel: [17180739.892000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:37 ubuntu kernel: [17180739.892000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:37 ubuntu kernel: [17180739.892000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:39 ubuntu kernel: [17180741.932000] ata1: translated ATA stat/err 0x51/01 to SCSI SK/ASC/ASCQ 0x3/13/00
Feb  1 09:02:39 ubuntu kernel: [17180741.932000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:39 ubuntu kernel: [17180741.932000] ata1: error=0x01 { AddrMarkNotFound }
Feb  1 09:02:39 ubuntu kernel: [17180741.932000] sd 0:0:0:0: SCSI error: return code = 0x8000002
Feb  1 09:02:39 ubuntu kernel: [17180741.932000] sda: Current: sense key: Medium Error
Feb  1 09:02:39 ubuntu kernel: [17180741.932000]     Additional sense: Address mark not found for data field
Feb  1 09:02:39 ubuntu kernel: [17180741.932000] end_request: I/O error, dev sda, sector 483636211
Feb  1 09:02:41 ubuntu kernel: [17180743.324000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:41 ubuntu kernel: [17180743.324000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:41 ubuntu kernel: [17180743.324000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:42 ubuntu kernel: [17180744.632000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:42 ubuntu kernel: [17180744.632000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:42 ubuntu kernel: [17180744.632000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:43 ubuntu kernel: [17180745.856000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:43 ubuntu kernel: [17180745.856000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:43 ubuntu kernel: [17180745.856000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:45 ubuntu kernel: [17180747.164000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:45 ubuntu kernel: [17180747.164000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:45 ubuntu kernel: [17180747.164000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:46 ubuntu kernel: [17180748.472000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:46 ubuntu kernel: [17180748.472000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:46 ubuntu kernel: [17180748.472000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:46 ubuntu kernel: [17180748.472000] sd 0:0:0:0: SCSI error: return code = 0x8000002
Feb  1 09:02:46 ubuntu kernel: [17180748.472000] sda: Current: sense key: Medium Error
Feb  1 09:02:46 ubuntu kernel: [17180748.472000]     Additional sense: Unrecovered read error - auto reallocate failed
Feb  1 09:02:46 ubuntu kernel: [17180748.472000] end_request: I/O error, dev sda, sector 483636219
Feb  1 09:02:47 ubuntu kernel: [17180749.864000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:47 ubuntu kernel: [17180749.864000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:47 ubuntu kernel: [17180749.864000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:49 ubuntu kernel: [17180751.172000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:49 ubuntu kernel: [17180751.172000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:49 ubuntu kernel: [17180751.172000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:50 ubuntu kernel: [17180752.480000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:50 ubuntu kernel: [17180752.480000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:50 ubuntu kernel: [17180752.480000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:51 ubuntu kernel: [17180753.792000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:51 ubuntu kernel: [17180753.792000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:51 ubuntu kernel: [17180753.792000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:52 ubuntu kernel: [17180755.100000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:52 ubuntu kernel: [17180755.100000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:52 ubuntu kernel: [17180755.100000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:52 ubuntu kernel: [17180755.100000] sd 0:0:0:0: SCSI error: return code = 0x8000002
Feb  1 09:02:52 ubuntu kernel: [17180755.100000] sda: Current: sense key: Medium Error
Feb  1 09:02:52 ubuntu kernel: [17180755.100000]     Additional sense: Unrecovered read error - auto reallocate failed
Feb  1 09:02:52 ubuntu kernel: [17180755.100000] end_request: I/O error, dev sda, sector 483636227
Feb  1 09:02:55 ubuntu kernel: [17180757.688000] ata1: translated ATA stat/err 0x51/01 to SCSI SK/ASC/ASCQ 0x3/13/00
Feb  1 09:02:55 ubuntu kernel: [17180757.688000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:55 ubuntu kernel: [17180757.688000] ata1: error=0x01 { AddrMarkNotFound }
Feb  1 09:02:56 ubuntu kernel: [17180758.824000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:56 ubuntu kernel: [17180758.824000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:56 ubuntu kernel: [17180758.824000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:02:57 ubuntu kernel: [17180759.896000] ata1: translated ATA stat/err 0x51/40 to SCSI SK/ASC/ASCQ 0x3/11/04
Feb  1 09:02:57 ubuntu kernel: [17180759.896000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:02:57 ubuntu kernel: [17180759.896000] ata1: error=0x40 { UncorrectableError }
Feb  1 09:03:00 ubuntu kernel: [17180762.404000] ata1: translated ATA stat/err 0x51/01 to SCSI SK/ASC/ASCQ 0x3/13/00
Feb  1 09:03:00 ubuntu kernel: [17180762.404000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:03:00 ubuntu kernel: [17180762.404000] ata1: error=0x01 { AddrMarkNotFound }
Feb  1 09:03:02 ubuntu kernel: [17180764.904000] ata1: translated ATA stat/err 0x51/01 to SCSI SK/ASC/ASCQ 0x3/13/00
Feb  1 09:03:02 ubuntu kernel: [17180764.904000] ata1: status=0x51 { DriveReady SeekComplete Error }
Feb  1 09:03:02 ubuntu kernel: [17180764.904000] ata1: error=0x01 { AddrMarkNotFound }
Feb  1 09:03:02 ubuntu kernel: [17180764.904000] sd 0:0:0:0: SCSI error: return code = 0x8000002
Feb  1 09:03:02 ubuntu kernel: [17180764.904000] sda: Current: sense key: Medium Error
Feb  1 09:03:02 ubuntu kernel: [17180764.904000]     Additional sense: Address mark not found for data field
Feb  1 09:03:02 ubuntu kernel: [17180764.904000] end_request: I/O error, dev sda, sector 483636235