Offline uncorrectable sectors

[Paul Smith]

Dear All,

I am getting the following warning on a terminal window (F22, :

-------------------------
WARNING: Your hard drive is failing
Device: /dev/sda [SAT], 1 Offline uncorrectable sectors
-------------------------

(Please, find below the output of smartctl -a /dev/sda)

Is that a serious problem? What should I do?

Thanks in advance,

Paul

-------------------------

# smartctl -a /dev/sda
smartctl 6.4 2015-06-04 r4109 [x86_64-linux-4.1.4-200.fc22.x86_64] (local build)
Copyright (C) 2002-15, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Western Digital Green
Device Model:     WDC WD20EARX-00PASB0
Serial Number:    WD-WCAZAJ822299
LU WWN Device Id: 5 0014ee 2b260482b
Firmware Version: 51.0AB51
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS (minor revision not indicated)
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Sun Aug 16 15:36:46 2015 WEST
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:  (0x82)    Offline data collection activity
                    was completed without error.
                    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:         (37500) 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:      ( 361) minutes.
Conveyance self-test routine
recommended polling time:      (   5) minutes.
SCT capabilities:            (0x3035)    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   200   200   051    Pre-fail
Always       -       22
  3 Spin_Up_Time            0x0027   172   165   021    Pre-fail
Always       -       6383
  4 Start_Stop_Count        0x0032   099   099   000    Old_age
Always       -       1446
  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail
Always       -       0
  7 Seek_Error_Rate         0x002e   200   200   000    Old_age
Always       -       0
  9 Power_On_Hours          0x0032   089   089   000    Old_age
Always       -       8161
 10 Spin_Retry_Count        0x0032   100   100   000    Old_age
Always       -       0
 11 Calibration_Retry_Count 0x0032   100   100   000    Old_age
Always       -       0
 12 Power_Cycle_Count       0x0032   099   099   000    Old_age
Always       -       1446
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age
Always       -       18
193 Load_Cycle_Count        0x0032   136   136   000    Old_age
Always       -       192777
194 Temperature_Celsius     0x0022   116   107   000    Old_age
Always       -       34
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age
Always       -       0
197 Current_Pending_Sector  0x0032   200   200   000    Old_age
Always       -       1
198 Offline_Uncorrectable   0x0030   200   200   000    Old_age
Offline      -       1
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age
Always       -       0
200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age
Offline      -       1

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  Short offline       Completed without error       00%      4062         -
# 2  Short offline       Completed without error       00%      4062         -

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.

[Sam Varshavchik]

Paul Smith writes:
> Dear All,
>
> I am getting the following warning on a terminal window (F22, :
>
> WARNING: Your hard drive is failing
> Device: /dev/sda [SAT], 1 Offline uncorrectable sectors
>
> (Please, find below the output of smartctl -a /dev/sda)
>
> Is that a serious problem?

Yes.
>                          What should I do?

Buy a new hard drive, hopefully you'll receive it and be able to copy all of  
your data from this one, before your current hard drive turns into a brick.

[Tom Horsley]

On Sun, 16 Aug 2015 10:51:00 -0400
Sam Varshavchik wrote:
> Buy a new hard drive, hopefully you'll receive it and be able to copy all of  
> your data from this one, before your current hard drive turns into a brick.

Yea, it took a while for my drive to get more than 1 uncorrectable
sector, but once I got one, it eventually got worse.

[Martin Cigorraga]

Hi all,

I would like to add that there's a convenient utility shipped with Fedora
(at least with the GNOME version) called 'Disks' that helps you tweak some
of your disk options as well as check its health state by showing the SMART
information.

Cheers.

On Sun, Aug 16, 2015 at 12:47 PM, Tom Horsley  wrote:
> On Sun, 16 Aug 2015 10:51:00 -0400
> Sam Varshavchik wrote:
> > Buy a new hard drive, hopefully you'll receive it and be able to copy
>
> all of
> > your data from this one, before your current hard drive turns into a
>
> brick.
>
> Yea, it took a while for my drive to get more than 1 uncorrectable
> sector, but once I got one, it eventually got worse.
> --
> users mailing list
> [e-mail]
> To unsubscribe or change subscription options:
> https://admin.fedoraproject.org/mailman/listinfo/users
> Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
> Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
> Have a question? Ask away: http://ask.fedoraproject.org

[Paul Smith]

On Sun, Aug 16, 2015 at 3:44 PM, Paul Smith  wrote:
> I am getting the following warning on a terminal window (F22, :
>
> WARNING: Your hard drive is failing
> Device: /dev/sda [SAT], 1 Offline uncorrectable sectors
>
> (Please, find below the output of smartctl -a /dev/sda)
>
> Is that a serious problem? What should I do?

Thanks to all for your replies.

Paul

SV: Offline uncorrectable sectors

[Birger Monsen]

Sounds like you already have smartmontools installed.  Use smartctl to look at your disks SMART data and also run the built in diagnostics.

ddrescue is a good tool to recover your data. Look at the example section in the manual. info ddrescue. The first pass will read the whole disk with a large block size, skipping all read errors to save as much as possible as quickly as possible. The second run then reads only the failed sectors from the first run with smaller block sizes and retries multiple times. Then fsck the fresh copy and hope you got everything.

I just did this successfully on a windows drive. Only one 512b block failed completely.

Sendt fra min Sony Xperia™-smarttelefon

---- Paul Smith skrev ----
> Dear All,
>
> I am getting the following warning on a terminal window (F22, :
>
> WARNING: Your hard drive is failing
> Device: /dev/sda [SAT], 1 Offline uncorrectable sectors
>
> (Please, find below the output of smartctl -a /dev/sda)
>
> Is that a serious problem? What should I do?
>
> Thanks in advance,
>
> Paul
>
> # smartctl -a /dev/sda
> smartctl 6.4 2015-06-04 r4109 [x86_64-linux-4.1.4-200.fc22.x86_64] (local build)
> Copyright (C) 2002-15, Bruce Allen, Christian Franke, www.smartmontools.org
>
> === START OF INFORMATION SECTION ===
> Model Family:     Western Digital Green
> Device Model:     WDC WD20EARX-00PASB0
> Serial Number:    WD-WCAZAJ822299
> LU WWN Device Id: 5 0014ee 2b260482b
> Firmware Version: 51.0AB51
> User Capacity:    2,000,398,934,016 bytes [2.00 TB]
> Sector Sizes:     512 bytes logical, 4096 bytes physical
> Device is:        In smartctl database [for details use: -P show]
> ATA Version is:   ATA8-ACS (minor revision not indicated)
> SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
> Local Time is:    Sun Aug 16 15:36:46 2015 WEST
> 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:  (0x82)    Offline data collection activity
>                    was completed without error.
>                    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:         (37500) 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:      ( 361) minutes.
> Conveyance self-test routine
> recommended polling time:      (   5) minutes.
> SCT capabilities:            (0x3035)    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   200   200   051    Pre-fail
> Always       -       22
>  3 Spin_Up_Time            0x0027   172   165   021    Pre-fail
> Always       -       6383
>  4 Start_Stop_Count        0x0032   099   099   000    Old_age
> Always       -       1446
>  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail
> Always       -       0
>  7 Seek_Error_Rate         0x002e   200   200   000    Old_age
> Always       -       0
>  9 Power_On_Hours          0x0032   089   089   000    Old_age
> Always       -       8161
> 10 Spin_Retry_Count        0x0032   100   100   000    Old_age
> Always       -       0
> 11 Calibration_Retry_Count 0x0032   100   100   000    Old_age
> Always       -       0
> 12 Power_Cycle_Count       0x0032   099   099   000    Old_age
> Always       -       1446
> 192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age
> Always       -       18
> 193 Load_Cycle_Count        0x0032   136   136   000    Old_age
> Always       -       192777
> 194 Temperature_Celsius     0x0022   116   107   000    Old_age
> Always       -       34
> 196 Reallocated_Event_Count 0x0032   200   200   000    Old_age
> Always       -       0
> 197 Current_Pending_Sector  0x0032   200   200   000    Old_age
> Always       -       1
> 198 Offline_Uncorrectable   0x0030   200   200   000    Old_age
> Offline      -       1
> 199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age
> Always       -       0
> 200 Multi_Zone_Error_Rate   0x0008   200   200   000    Old_age
> Offline      -       1
>
> 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  Short offline       Completed without error       00%      4062         -
> # 2  Short offline       Completed without error       00%      4062         -
>
> 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.
> -- 
> users mailing list
> [e-mail]
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> Have a question? Ask away: http://ask.fedoraproject.org

[Chris Murphy]

https://www.smartmontools.org/browser/trunk/www/badblockhowto.xml

This will help you figure out what data is in the bad sector, and
whether it's important or replaceable from a backup.

Note that this is an AF drive, specifically 512e variety. 512 bytes
logical sector, 4096 bytes physical sector. To erase, you have to do a
4KiB write. If you do a 512 byte write, or 8 512 byte writes, the
drive will likely do read,modify,write which will fail at read and
you'll get a read error from the drive even though you're writing.
This is of course confusing. So if you use dd to do the overwrite,
bs=4096 and then you have to adjust the seek= value since it too will
be based on 4096 bytes; whereas LBA for a 512e drive is based on 512
byte sectors. So yeah, make sure you get it right or you'll zero some
other sector. Make sure count=1 to avoid a mess...

hdparm has a way to do this also but I haven't used it, so I'm not
sure how the whole 512 vs 4096 thing gets sorted out.

---
Chris Murphy