WD3200AAKS - disappearing bad sectors?

Discussion in 'Memory and Storage' started by czesiu, Sep 27, 2010.

  1. czesiu

    czesiu Member

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    Hello! :)

    I have a problem with WD3200AAKS hard drive. I wanted to send it for warranty exchange so I did a Full Erase with Data Lifeguard diagnostic.

    Before the full erase:
    Current Pending Sector Count was at 8
    and extended test results looked like this:
    Code:
    Test Option: EXTENDED TEST
    Model Number: WDC WD3200AAKS-00B3A0
    Unit Serial Number: WD-WCAT14113874
    Firmware Number: 01.03A01
    Capacity: 320.07 GB
    SMART Status: PASS
    Test Result: FAIL
    Test Error Code: 08-Error was detected while repairing bad sectors.
    Test Time: 20:40:48, September 04, 2010
    

    After full erase:

    Code:
    1,Raw Read Error Rate,51,200,200,OK,0000000001B5,0,Enabled
    3,Spin Up Time,21,155,154,OK,000000000C99,0,Enabled
    4,Start/Stop Count,0,99,99,OK (Always passing),0000000004AE,0,Enabled
    5,Reallocated Sectors Count,140,200,200,OK,000000000000,0,Enabled
    7,Seek Error Rate,0,200,200,OK (Always passing),000000000000,0,Enabled
    9,Power On Time Count,0,92,92,OK (Always passing),000000001849,0,Enabled
    10,Spin Retry Count,0,100,100,OK (Always passing),000000000000,0,Enabled
    11,Drive Calibration Retry Count,0,100,100,OK (Always passing),000000000000,0,Enabled
    12,Drive Power Cycle Count,0,99,99,OK (Always passing),000000000498,0,Enabled
    192,Power off Retract Cycle Count,0,200,200,OK (Always passing),000000000051,0,Enabled
    193,Load/Unload Cycle Count,0,200,200,OK (Always passing),0000000004AE,0,Enabled
    194,Disk Temperature,0,118,97,OK (Always passing),000000000019,0,Enabled
    196,Reallocation Event Count,0,200,200,OK (Always passing),000000000000,0,Enabled
    197,Current Pending Sector Count,0,200,200,OK (Always passing),000000000000,0,Enabled
    198,Off-Line Uncorrectable Sector Count,0,200,200,OK (Always passing),000000000000,0,Enabled
    199,Ultra ATA CRC Error Count,0,200,200,OK (Always passing),000000000001,0,Enabled
    200,Write Error Rate,0,200,200,OK (Always passing),000000000000,0,Enabled

    Code:
    Test Option: EXTENDED TEST
    Model Number: WDC WD3200AAKS-00B3A0
    Unit Serial Number: WD-WCAT14113874
    Firmware Number: 01.03A01
    Capacity: 320.07 GB
    SMART Status: PASS
    Test Result: FAIL
    Test Error Code: 08-Too many bad sectors detected.
    Test Time: 17:15:29, September 20, 2010
    

    I also tried to test with HDDScan and did not find any bad sectors.

    Is the drive dying? Or is it OK and the smart info and DLD test results should not be trusted?
     
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  3. sub.mesa

    sub.mesa Senior member

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    I can see no reallocated sectors.

    Try with HDTune; post a screenshot of the SMART values (Health tab). And you can also do a surface scan to detect bad sectors.

    Perhaps the manufacturer utility yields some unpredictable results. If you have bad sectors, HDTune would find them.

    Curious if that is the case, since your SMART information does not list any bad sectors; just a SATA cable error ("Ultra ATA CRC error count") but that's just one I/O command that failed according to your output.

    So i would recommend further testing.
     
  4. Makaijin

    Makaijin Junior Member

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    Does the bad sectors still show up after the full erase? As logical bad sectors can be fixed with a full erase whereas physical ones cannot. You can try using the "format" command in cmd prompt with the /p switch to force it to zero out the drive multple times in an attempt to fix logical errors.
     
    #3 Makaijin, Sep 27, 2010
    Last edited: Sep 27, 2010
  5. czesiu

    czesiu Member

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    Surface scan in HD Tune started detecting bad sectors at ~25% of drive and froze... I wonder why HDDScan reported that every sector is readable?
     
  6. sub.mesa

    sub.mesa Senior member

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    Check the SMART output again with HDTune; without doing the surface scan. Can you show us a screenshot of all the values? Make the window bigger if possible so all data is visible.
     
  7. czesiu

    czesiu Member

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  8. corkyg

    corkyg Elite Member<br>Super Moderator <br>Peripherals
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    Apparently, your WD diagnostic utility remapped the drive when it did the full erase. That remapping would then make all the bad sectors invisible to the OS, IOW, they are just not on the new sector map. This explains:

    http://en.wikipedia.org/wiki/Bad_sector

    If you have a lot of bad sectors, RMA is a good solution.
     
  9. Russwinters

    Russwinters Senior member

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    If you can view SMART you will likely see x number of reallocated sectors.

    These sectors are now mapped to the G-LIST, and reserve sectors have taken their place.


    This will affect performance on the tracks these sectors lie on, as the heads must seek to the reserve area to read 1 sector, then return to the track they where reading before, this will cause spikes in access times around the area where the bad sector was.


    RMA if you can.
     
  10. czesiu

    czesiu Member

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    like this one? :)
    196,Reallocation Event Count,0,200,200,OK (Always passing),000000000000,0,Enabled
     
  11. Russwinters

    Russwinters Senior member

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    Yep.


    What program gave that output? It presents things kind of badly.


    My guess is that the drive has reallocated 196 sectors, there is almost definitely more, but the drive has not run into them yet.
     
  12. czesiu

    czesiu Member

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    196 is just a SMART code for Reallocation Event Count

    program is Data Lifeguard diagnostic AFAIR
     
  13. czesiu

    czesiu Member

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    interesting:

    http://www.ntfs.com/disk-monitor-smart-attributes.htm

    196 C4 Reallocation Event Count
    Count of remap operations. The raw value of this attribute shows the total number of attempts to transfer data from reallocated sectors to a spare area. Both successful & unsuccessful attempts are counted.
     
  14. czesiu

    czesiu Member

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    so this one is more important:
    5,Reallocated Sectors Count,140,200,200,OK,000000000000,0,Enabled
     
  15. Russwinters

    Russwinters Senior member

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    There ya go =)

    196 attempts to reallocate, only 5 successful.


    the fact that there were 196 attempts is worrisome.
     
  16. czesiu

    czesiu Member

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    no:) 196,197 and 5 are just codes/IDs, not values :)
     
  17. Russwinters

    Russwinters Senior member

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    Incorrect, SMART values on modern drives are stored different depending on the field.


    In the case of these fields there is a Value, Worst, and Threshold (your three other numbers listed) and then there is a "RAW" value of that field.

    The RAW value is recorded normally in WD drives, hence you have 196 (or 197 now) attempted reallocation events, and 5 success reallocated sectors.


    As mentioned, the software doesn't really lay out the values well. WD engineers never really did know how to write code very well apparently =( thats why all the firmware issues.
     
  18. Russwinters

    Russwinters Senior member

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    Nevermind, I woke up and read the software output.


    Sigh I don't like WD software.


    Those are the SMART field IDs; this drive has no reallocated event OR reallocated sectors.


    run this:


    www.hddscan.com


    make sure you use the sector access time view.

    see how the surface of the disk looks.
     
  19. tcsenter

    tcsenter Lifer

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    No, this one is:

    Test Result: FAIL
    Test Error Code: 08-Too many bad sectors detected.


    SMART is highly implementation dependent and the typical implementation is none too rigorous as to be all that terribly trustworthy.
     
  20. czesiu

    czesiu Member

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    some sectors had delays but I was using the PC during the test
     
  21. czesiu

    czesiu Member

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    oh yes I noticed ;)

    As I said earlier I will RMA the drive based on that error 08 :)