Ubuntu 14.04.2 LTS borbein hvc0

borbein login: [  139.832200] device-mapper: table: 252:0: multipath: error getting device
[  139.835162] device-mapper: table: 252:0: multipath: error getting device
[  139.959780] device-mapper: table: 252:5: multipath: error getting device
[  139.961878] device-mapper: table: 252:5: multipath: error getting device
Thu Jun  4 14:54:39 UTC 2015: shutting down for reboot [up 178s].
wait-for-state stop/waiting
 * Stopping landscape-client daemon                                      [fail]
 * Stopping multipath daemon multipathd                                  [ OK ]
 * Stopping rsync daemon rsync                                           [ OK ]
 * Unmounting iscsi-backed filesystems                                   [ OK ]
 * /etc/iscsi/iscsi.initramfs present, not stopping iscsid yet
 * Asking all remaining processes to terminate...                        [ OK ]
 * All processes ended within 1 seconds...                               [ OK ]
 * Deactivating swap...                                                  [ OK ]
 * Stopping early crypto disks...                                        [ OK ]
mount: / is busy
 * Will now restart
[  186.214105] reboot: Restarting system
[  186.220107] ata1: translated ATA stat/err 0x50/00 to SCSI SK/ASC/ASCQ 0xb/00/00
[  186.220302] end_request: I/O error, dev sda, sector 432085248
[  186.220443] end_request: I/O error, dev sda, sector 432085760
[  186.220578] end_request: I/O error, dev sda, sector 432086272
[  186.220712] end_request: I/O error, dev sda, sector 432086784
[  186.220844] end_request: I/O error, dev sda, sector 432087296
[  186.220974] end_request: I/O error, dev sda, sector 432087808
[  186.221102] end_request: I/O error, dev sda, sector 432088320
[  186.221230] end_request: I/O error, dev sda, sector 432088832
[  186.221429] end_request: I/O error, dev sda, sector 277139224
[  186.221549] Aborting journal on device sda2-8.
[  186.221660] end_request: I/O error, dev sda, sector 277104640
[  186.221774] Buffer I/O error on device sda2, logical block 34635776
[  186.221894] JBD2: Error -5 detected when updating journal superblock for sda2-8.
[  188.408121] ata1: translated ATA stat/err 0x50/00 to SCSI SK/ASC/ASCQ 0xb/00/00
[  190.448111] ata1: translated ATA stat/err 0x50/00 to SCSI SK/ASC/ASCQ 0xb/00/00
[  192.496121] ata1: translated ATA stat/err 0x50/00 to SCSI SK/ASC/ASCQ 0xb/00/00
[  194.544118] ata1: translated ATA stat/err 0x50/00 to SCSI SK/ASC/ASCQ 0xb/00/00
[  196.592111] ata1: translated ATA stat/err 0x50/00 to SCSI SK/ASC/ASCQ 0xb/00/00
[  198.644121] ata1: translated ATA stat/err 0x50/00 to SCSI SK/ASC/ASCQ 0xb/00/00