kernel-packages team mailing list archive

[Ritesh Khadgaray <1259829@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

fs goes into read-only mode while build lo

$ dmesg
...
[ 2045.473249] virbr0: port 1(vnet0) entered forwarding state
[ 2045.473283] IPv6: ADDRCONF(NETDEV_CHANGE): virbr0: link becomes ready
[10660.961381] perf samples too long (2505 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
[11822.935891] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629599: block 214443464: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=1667681412, rec_len=45654, name_len=39
[11822.935896] Aborting journal on device dm-1-8.
[11822.935998] EXT4-fs (dm-1): Remounting filesystem read-only
[11822.960425] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629605: block 214443466: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=2707156714, rec_len=19312, name_len=162
[11850.985003] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629557: block 214443458: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=512948573, rec_len=8858, name_len=176
[11850.985276] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629465: block 214443455: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=160939375, rec_len=26085, name_len=126
[11850.985499] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629325: block 214443451: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=2322664969, rec_len=33791, name_len=132
[11850.985927] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629467: block 214443456: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=954332768, rec_len=21653, name_len=30
[11850.986409] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629074: block 214443433: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=2061605548, rec_len=4984, name_len=3
[11850.986831] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53628835: block 214443432: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=3523041938, rec_len=53167, name_len=41
[11850.987001] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629098: block 214443436: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=4225920287, rec_len=35138, name_len=75
[11850.987466] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629275: block 214443449: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=923253145, rec_len=44001, name_len=144
[11850.988115] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629270: block 214443448: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=1892288796, rec_len=55247, name_len=58
[11851.042303] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629300: block 214443450: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=1809316884, rec_len=4208, name_len=195
[11851.042938] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629401: block 214443453: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=4223616103, rec_len=36326, name_len=130
[11851.045745] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629406: block 214443454: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=415237227, rec_len=24702, name_len=59
[11851.125849] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629101: block 214443437: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=23292377, rec_len=28820, name_len=135
[11851.126086] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629543: block 214443457: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=2624043515, rec_len=58633, name_len=250
[11851.126292] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629244: block 214443446: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=194839831, rec_len=15430, name_len=123
[11851.126529] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629345: block 214443452: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=3316601052, rec_len=49124, name_len=10
[11851.126751] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629080: block 214443434: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=2978861680, rec_len=55340, name_len=75
[11851.127326] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629254: block 214443447: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=2927900409, rec_len=17708, name_len=67
[11851.191574] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53628436: block 214443431: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=3175406590, rec_len=48803, name_len=238
[11851.191832] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629561: block 214443459: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=880872205, rec_len=23750, name_len=202
[11851.192102] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629565: block 214443460: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=3673769297, rec_len=36964, name_len=8
[11851.193231] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629577: block 214443462: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=164744460, rec_len=27548, name_len=230
[ritesh@x230t libreoffice-4.1.2~rc3]$ ^C
[ritesh@x230t libreoffice-4.1.2~rc3]$ smartctl  -a /dev/sda
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.12.0-7-generic] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

[ritesh@x230t libreoffice-4.1.2~rc3]$ sudo smartctl  -a /dev/sda
sudo: unable to open /var/lib/sudo/ritesh/4: No such file or directory
smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.12.0-7-generic] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     Crucial_CT960M500SSD1
Serial Number:    1335094BE7CA
LU WWN Device Id: 5 00a075 1094be7ca
Firmware Version: MU03
User Capacity:    960,197,124,096 bytes [960 GB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    Solid State Device
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 6
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Wed Dec 11 11:38:48 2013 IST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x80)	Offline data collection activity
					was never started.
					Auto Offline Data Collection: Enabled.
Self-test execution status:      (   0)	The previous self-test routine completed
					without error or no self-test has ever 
					been run.
Total time to complete Offline 
data collection: 		( 4470) seconds.
Offline data collection
capabilities: 			 (0x7b) SMART execute Offline immediate.
					Auto Offline data collection on/off support.
					Suspend Offline collection upon new
					command.
					Offline surface scan supported.
					Self-test supported.
					Conveyance Self-test supported.
					Selective Self-test supported.
SMART capabilities:            (0x0003)	Saves SMART data before entering
					power-saving mode.
					Supports SMART auto save timer.
Error logging capability:        (0x01)	Error logging supported.
					General Purpose Logging supported.
Short self-test routine 
recommended polling time: 	 (   2) minutes.
Extended self-test routine
recommended polling time: 	 (  74) minutes.
Conveyance self-test routine
recommended polling time: 	 (   3) minutes.
SCT capabilities: 	       (0x0035)	SCT Status supported.
					SCT Feature Control supported.
					SCT Data Table supported.

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x002f   100   100   000    Pre-fail  Always       -       21
  5 Reallocated_Sector_Ct   0x0033   100   100   000    Pre-fail  Always       -       0
  9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       287
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       32
171 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       0
172 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       0
173 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       1
174 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       13
180 Unused_Rsvd_Blk_Cnt_Tot 0x0033   000   000   000    Pre-fail  Always       -       16523
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
184 End-to-End_Error        0x0032   100   100   000    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
194 Temperature_Celsius     0x0022   056   050   000    Old_age   Always       -       44 (Min/Max 22/50)
196 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       16
197 Current_Pending_Sector  0x0032   100   100   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0030   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   100   100   000    Old_age   Always       -       0
202 Unknown_SSD_Attribute   0x0031   100   100   000    Pre-fail  Offline      -       0
206 Unknown_SSD_Attribute   0x000e   100   100   000    Old_age   Always       -       0
210 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       4
246 Unknown_Attribute       0x0032   100   100   ---    Old_age   Always       -       2001841864
247 Unknown_Attribute       0x0032   100   100   ---    Old_age   Always       -       63823477
248 Unknown_Attribute       0x0032   100   100   ---    Old_age   Always       -       84291328

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Vendor (0xff)       Completed without error       00%       279         -
# 2  Extended offline    Completed without error       00%       273         -
# 3  Vendor (0xff)       Completed without error       00%        90         -
# 4  Vendor (0xff)       Completed without error       00%         5         -
# 5  Short offline       Aborted by host               00%         2         -
# 6  Vendor (0xff)       Completed without error       00%         2         -

SMART Selective self-test log data structure revision number 1
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Not_testing
    2        0        0  Not_testing
    3        0        0  Not_testing
    4        0        0  Not_testing
    5        0        0  Not_testing
Selective self-test flags (0x0):
  After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.

[ritesh@x230t libreoffice-4.1.2~rc3]$ uname  -a
Linux x230t 3.12.0-7-generic #15-Ubuntu SMP Sun Dec 8 23:39:27 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

$ mount
/dev/mapper/ubuntu--vg-root on / type ext4 (rw,noatime,errors=remount-ro,discard)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/cgroup type tmpfs (rw)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /sys/firmware/efi/efivars type efivarfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
tmpfs on /tmp type tmpfs (rw,noatime,mode=1777)
tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
none on /run/shm type tmpfs (rw,nosuid,nodev)
none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)
none on /sys/fs/pstore type pstore (rw)
tmpfs on /var/tmp type tmpfs (rw,noatime,mode=1777)
tmpfs on /var/log type tmpfs (rw,noatime,mode=0755)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,relatime,cpuset)
cgroup on /sys/fs/cgroup/cpu type cgroup (rw,relatime,cpu)
cgroup on /sys/fs/cgroup/cpuacct type cgroup (rw,relatime,cpuacct)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,relatime,memory)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,relatime,devices)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,relatime,freezer)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,relatime,blkio)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,relatime,perf_event)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,relatime,hugetlb)
/dev/sda2 on /boot type ext2 (rw)
/dev/sda1 on /boot/efi type vfat (rw)
systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,user=ritesh)


fsck/badblock (read only)  says disk is clean.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1259829

Title:
   htree_dirblock_to_tree:920: inode #53629599: block 214443464: comm
  rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0),
  inode=1667681412, rec_len=45654, name_len=39

Status in “linux” package in Ubuntu:
  New

Bug description:
  fs goes into read-only mode while build lo

  $ dmesg
  ...
  [ 2045.473249] virbr0: port 1(vnet0) entered forwarding state
  [ 2045.473283] IPv6: ADDRCONF(NETDEV_CHANGE): virbr0: link becomes ready
  [10660.961381] perf samples too long (2505 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
  [11822.935891] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629599: block 214443464: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=1667681412, rec_len=45654, name_len=39
  [11822.935896] Aborting journal on device dm-1-8.
  [11822.935998] EXT4-fs (dm-1): Remounting filesystem read-only
  [11822.960425] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629605: block 214443466: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=2707156714, rec_len=19312, name_len=162
  [11850.985003] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629557: block 214443458: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=512948573, rec_len=8858, name_len=176
  [11850.985276] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629465: block 214443455: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=160939375, rec_len=26085, name_len=126
  [11850.985499] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629325: block 214443451: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=2322664969, rec_len=33791, name_len=132
  [11850.985927] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629467: block 214443456: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=954332768, rec_len=21653, name_len=30
  [11850.986409] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629074: block 214443433: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=2061605548, rec_len=4984, name_len=3
  [11850.986831] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53628835: block 214443432: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=3523041938, rec_len=53167, name_len=41
  [11850.987001] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629098: block 214443436: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=4225920287, rec_len=35138, name_len=75
  [11850.987466] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629275: block 214443449: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=923253145, rec_len=44001, name_len=144
  [11850.988115] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629270: block 214443448: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=1892288796, rec_len=55247, name_len=58
  [11851.042303] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629300: block 214443450: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=1809316884, rec_len=4208, name_len=195
  [11851.042938] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629401: block 214443453: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=4223616103, rec_len=36326, name_len=130
  [11851.045745] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629406: block 214443454: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=415237227, rec_len=24702, name_len=59
  [11851.125849] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629101: block 214443437: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=23292377, rec_len=28820, name_len=135
  [11851.126086] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629543: block 214443457: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=2624043515, rec_len=58633, name_len=250
  [11851.126292] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629244: block 214443446: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=194839831, rec_len=15430, name_len=123
  [11851.126529] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629345: block 214443452: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=3316601052, rec_len=49124, name_len=10
  [11851.126751] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629080: block 214443434: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=2978861680, rec_len=55340, name_len=75
  [11851.127326] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629254: block 214443447: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=2927900409, rec_len=17708, name_len=67
  [11851.191574] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53628436: block 214443431: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=3175406590, rec_len=48803, name_len=238
  [11851.191832] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629561: block 214443459: comm rm: bad entry in directory: rec_len % 4 != 0 - offset=0(0), inode=880872205, rec_len=23750, name_len=202
  [11851.192102] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629565: block 214443460: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=3673769297, rec_len=36964, name_len=8
  [11851.193231] EXT4-fs error (device dm-1): htree_dirblock_to_tree:920: inode #53629577: block 214443462: comm rm: bad entry in directory: directory entry across range - offset=0(0), inode=164744460, rec_len=27548, name_len=230
  [ritesh@x230t libreoffice-4.1.2~rc3]$ ^C
  [ritesh@x230t libreoffice-4.1.2~rc3]$ smartctl  -a /dev/sda
  smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.12.0-7-generic] (local build)
  Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

  [ritesh@x230t libreoffice-4.1.2~rc3]$ sudo smartctl  -a /dev/sda
  sudo: unable to open /var/lib/sudo/ritesh/4: No such file or directory
  smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.12.0-7-generic] (local build)
  Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

  === START OF INFORMATION SECTION ===
  Device Model:     Crucial_CT960M500SSD1
  Serial Number:    1335094BE7CA
  LU WWN Device Id: 5 00a075 1094be7ca
  Firmware Version: MU03
  User Capacity:    960,197,124,096 bytes [960 GB]
  Sector Sizes:     512 bytes logical, 4096 bytes physical
  Rotation Rate:    Solid State Device
  Device is:        Not in smartctl database [for details use: -P showall]
  ATA Version is:   ACS-2, ATA8-ACS T13/1699-D revision 6
  SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
  Local Time is:    Wed Dec 11 11:38:48 2013 IST
  SMART support is: Available - device has SMART capability.
  SMART support is: Enabled

  === START OF READ SMART DATA SECTION ===
  SMART overall-health self-assessment test result: PASSED

  General SMART Values:
  Offline data collection status:  (0x80)	Offline data collection activity
  					was never started.
  					Auto Offline Data Collection: Enabled.
  Self-test execution status:      (   0)	The previous self-test routine completed
  					without error or no self-test has ever 
  					been run.
  Total time to complete Offline 
  data collection: 		( 4470) seconds.
  Offline data collection
  capabilities: 			 (0x7b) SMART execute Offline immediate.
  					Auto Offline data collection on/off support.
  					Suspend Offline collection upon new
  					command.
  					Offline surface scan supported.
  					Self-test supported.
  					Conveyance Self-test supported.
  					Selective Self-test supported.
  SMART capabilities:            (0x0003)	Saves SMART data before entering
  					power-saving mode.
  					Supports SMART auto save timer.
  Error logging capability:        (0x01)	Error logging supported.
  					General Purpose Logging supported.
  Short self-test routine 
  recommended polling time: 	 (   2) minutes.
  Extended self-test routine
  recommended polling time: 	 (  74) minutes.
  Conveyance self-test routine
  recommended polling time: 	 (   3) minutes.
  SCT capabilities: 	       (0x0035)	SCT Status supported.
  					SCT Feature Control supported.
  					SCT Data Table supported.

  SMART Attributes Data Structure revision number: 16
  Vendor Specific SMART Attributes with Thresholds:
  ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
    1 Raw_Read_Error_Rate     0x002f   100   100   000    Pre-fail  Always       -       21
    5 Reallocated_Sector_Ct   0x0033   100   100   000    Pre-fail  Always       -       0
    9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       287
   12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       32
  171 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       0
  172 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       0
  173 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       1
  174 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       13
  180 Unused_Rsvd_Blk_Cnt_Tot 0x0033   000   000   000    Pre-fail  Always       -       16523
  183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
  184 End-to-End_Error        0x0032   100   100   000    Old_age   Always       -       0
  187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
  194 Temperature_Celsius     0x0022   056   050   000    Old_age   Always       -       44 (Min/Max 22/50)
  196 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       16
  197 Current_Pending_Sector  0x0032   100   100   000    Old_age   Always       -       0
  198 Offline_Uncorrectable   0x0030   100   100   000    Old_age   Offline      -       0
  199 UDMA_CRC_Error_Count    0x0032   100   100   000    Old_age   Always       -       0
  202 Unknown_SSD_Attribute   0x0031   100   100   000    Pre-fail  Offline      -       0
  206 Unknown_SSD_Attribute   0x000e   100   100   000    Old_age   Always       -       0
  210 Unknown_Attribute       0x0032   100   100   000    Old_age   Always       -       4
  246 Unknown_Attribute       0x0032   100   100   ---    Old_age   Always       -       2001841864
  247 Unknown_Attribute       0x0032   100   100   ---    Old_age   Always       -       63823477
  248 Unknown_Attribute       0x0032   100   100   ---    Old_age   Always       -       84291328

  SMART Error Log Version: 1
  No Errors Logged

  SMART Self-test log structure revision number 1
  Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
  # 1  Vendor (0xff)       Completed without error       00%       279         -
  # 2  Extended offline    Completed without error       00%       273         -
  # 3  Vendor (0xff)       Completed without error       00%        90         -
  # 4  Vendor (0xff)       Completed without error       00%         5         -
  # 5  Short offline       Aborted by host               00%         2         -
  # 6  Vendor (0xff)       Completed without error       00%         2         -

  SMART Selective self-test log data structure revision number 1
   SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
      1        0        0  Not_testing
      2        0        0  Not_testing
      3        0        0  Not_testing
      4        0        0  Not_testing
      5        0        0  Not_testing
  Selective self-test flags (0x0):
    After scanning selected spans, do NOT read-scan remainder of disk.
  If Selective self-test is pending on power-up, resume after 0 minute delay.

  [ritesh@x230t libreoffice-4.1.2~rc3]$ uname  -a
  Linux x230t 3.12.0-7-generic #15-Ubuntu SMP Sun Dec 8 23:39:27 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

  $ mount
  /dev/mapper/ubuntu--vg-root on / type ext4 (rw,noatime,errors=remount-ro,discard)
  proc on /proc type proc (rw,noexec,nosuid,nodev)
  sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
  none on /sys/fs/cgroup type tmpfs (rw)
  none on /sys/fs/fuse/connections type fusectl (rw)
  none on /sys/kernel/debug type debugfs (rw)
  none on /sys/kernel/security type securityfs (rw)
  none on /sys/firmware/efi/efivars type efivarfs (rw)
  udev on /dev type devtmpfs (rw,mode=0755)
  devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620)
  tmpfs on /tmp type tmpfs (rw,noatime,mode=1777)
  tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755)
  none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880)
  none on /run/shm type tmpfs (rw,nosuid,nodev)
  none on /run/user type tmpfs (rw,noexec,nosuid,nodev,size=104857600,mode=0755)
  none on /sys/fs/pstore type pstore (rw)
  tmpfs on /var/tmp type tmpfs (rw,noatime,mode=1777)
  tmpfs on /var/log type tmpfs (rw,noatime,mode=0755)
  cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,relatime,cpuset)
  cgroup on /sys/fs/cgroup/cpu type cgroup (rw,relatime,cpu)
  cgroup on /sys/fs/cgroup/cpuacct type cgroup (rw,relatime,cpuacct)
  cgroup on /sys/fs/cgroup/memory type cgroup (rw,relatime,memory)
  cgroup on /sys/fs/cgroup/devices type cgroup (rw,relatime,devices)
  cgroup on /sys/fs/cgroup/freezer type cgroup (rw,relatime,freezer)
  cgroup on /sys/fs/cgroup/blkio type cgroup (rw,relatime,blkio)
  cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,relatime,perf_event)
  cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,relatime,hugetlb)
  /dev/sda2 on /boot type ext2 (rw)
  /dev/sda1 on /boot/efi type vfat (rw)
  systemd on /sys/fs/cgroup/systemd type cgroup (rw,noexec,nosuid,nodev,none,name=systemd)
  gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,user=ritesh)

  
  fsck/badblock (read only)  says disk is clean.

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