HDDに問題があるのかもしれないけれど、マザーボードに問題があるのかもしれない。どっちが真かわからないのでとりあえず記録。
# cat /var/log/kern.log
Dec 13 06:25:02 XeonSM kernel: imklog 3.18.6, log source = /proc/kmsg started.
Dec 13 17:53:56 XeonSM kernel: [1258827.890361] hda: task_in_intr: status=0x59 { DriveReady SeekComplete DataRequest Error }
Dec 13 17:53:56 XeonSM kernel: [1258827.890361] hda: task_in_intr: error=0x40 { UncorrectableError }, LBAsect=393316, sector=393316
Dec 13 17:53:56 XeonSM kernel: [1258827.890361] ide: failed opcode was: unknown
Dec 13 17:53:56 XeonSM kernel: [1258827.890361] end_request: I/O error, dev hda, sector 393316
Dec 13 17:53:56 XeonSM kernel: [1258827.890828] EXT3-fs error (device hda1): ext3_get_inode_loc: unable to read inode block - inode=48313, block=196626
Dec 13 17:53:56 XeonSM kernel: [1258827.890828] Aborting journal on device hda1.
Dec 13 17:53:56 XeonSM kernel: [1258828.170828] Remounting filesystem read-only
Dec 13 17:53:57 XeonSM kernel: [1258828.846829] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:57 XeonSM kernel: [1258828.846829] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:57 XeonSM kernel: [1258828.846829] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:57 XeonSM kernel: [1258828.846829] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:57 XeonSM kernel: [1258828.846829] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:57 XeonSM kernel: [1258828.846829] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:57 XeonSM kernel: [1258828.846829] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_committed_data
Dec 13 17:53:59 XeonSM kernel: [1258830.693771] __journal_remove_journal_head: freeing b_frozen_data
Dec 13 18:51:08 XeonSM kernel: [1262259.591435] NET: Registered protocol family 10
Dec 13 18:51:08 XeonSM kernel: [1262259.592715] lo: Disabled Privacy Extensions
Dec 13 18:51:18 XeonSM kernel: [1262270.248823] eth0: no IPv6 routers present
Dec 14 06:25:02 XeonSM kernel: imklog 3.18.6, log source = /proc/kmsg started.
Dec 14 06:25:03 XeonSM kernel: imklog 3.18.6, log source = /proc/kmsg started.