Comment 3 for bug 711938

Feb 1 17:58:49 kernel: [ 174.354955] mptbase: ioc0: LogInfo(0x31140000): Originator={PL}, Code={IO Executed}, SubCode(0x0000) cb_idx mptscsih_io_done
Feb 1 17:58:49 kernel: [ 174.354969] sd 2:0:0:0: [sda] Unhandled error code
Feb 1 17:58:49 kernel: [ 174.354972] sd 2:0:0:0: [sda] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
Feb 1 17:58:49 kernel: [ 174.354977] sd 2:0:0:0: [sda] CDB: Write(10): 2a 00 00 45 2d b8 00 00 20 00
Feb 1 17:58:49 kernel: [ 174.354988] end_request: I/O error, dev sda, sector 4533688
Feb 1 17:58:49 kernel: [ 174.355016] Aborting journal on device sda1-8.
Feb 1 17:58:49 kernel: [ 174.359209] end_device-2:0: mptsas: ioc0: removing ssp device: fw_channel 0, fw_id 0, phy 0,sas_addr 0x500000e113c500b2
Feb 1 17:58:49 kernel: [ 174.359214] phy-2:0: mptsas: ioc0: delete phy 0, phy-obj (0xf47eca00)
Feb 1 17:58:49 kernel: [ 174.359226] port-2:0: mptsas: ioc0: delete port 0, sas_addr (0x500000e113c500b2)
Feb 1 17:58:49 debootstrap: dpkg: unrecoverable fatal error, aborting:
Feb 1 17:58:49 debootstrap: unable to sync directory '/var/lib/dpkg/updates/': Input/output error
Feb 1 17:58:49 kernel: [ 174.359382] JBD2: I/O error detected when updating journal superblock for sda1-8.
Feb 1 17:58:49 kernel: [ 174.359476] journal commit I/O error
Feb 1 17:58:49 kernel: [ 174.360592] EXT4-fs error (device sda1): ext4_journal_start_sb:258: Detected aborted journal
Feb 1 17:58:49 kernel: [ 174.360597] EXT4-fs (sda1): Remounting filesystem read-only

It all goes wrong from there on in. Looks like a kernel problem to me.