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4TB drive preclear - reallocated sectors

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Hi all,

I just precleared six 4TB drives. All passed with no problems except one which returned the following:

 

Disk Temperature: 32C, Elapsed Time:  19:51:31
========================================================================1.13
==
== Disk /dev/sde has been verified precleared
== with a starting sector of 1
============================================================================
** Changed attributes in files: /tmp/smart_start_sde  /tmp/smart_finish_sde
                ATTRIBUTE   NEW_VAL OLD_VAL FAILURE_THRESHOLD STATUS      RAW_VALUE
      Raw_Read_Error_Rate =   120     109            6        ok          235185432
         Spin_Retry_Count =   100     100           97        near_thresh 0
         End-to-End_Error =   100     100           99        near_thresh 0
       Reported_Uncorrect =    48      74            0        ok          52
  Airflow_Temperature_Cel =    68      70           45        near_thresh 32
      Temperature_Celsius =    32      30            0        ok          32
No SMART attributes are FAILING_NOW

48 sectors were pending re-allocation before the start of the preclear.

64 sectors are pending re-allocation at the end of the preclear,
    a change of 16 in the number of sectors pending re-allocation.
0 sectors had been re-allocated before the start of the preclear.
0 sectors are re-allocated at the end of the preclear,
    the number of sectors re-allocated did not change.

 

 

Should I RMA this disk given that it's brand new, or is this kind of thing normal?

 

Thanks in advance

You can RMA it or keep running preclear's until your pending sector count is zero.  Don't use it in your array until the pending count is zero.  Personally since pending sectors went up (48 before - 64 after) not down on the preclear - I would RMA it.

Agree with Bob => although modern drives have spare sectors precisely so they can remap defective areas, I nevertheless do NOT keep new drives that start out this way.

 

If I get ANY non-zero re-allocated sector counters in the pre-clear, I RMA the drive.

 

  • Author

Thanks guys. I've started an RMA which shouldn't be a problem. Out of curiosity I restarted a preclear -W and it failed immediately filling my log with garbage. It's great to be able to catch these problems before they become array data problems. Though, I do wish that Seagate had better QA.

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