So I just put two new WD-4TB drives in my HP N40L to prelcear. I ran both drives through 3 cycles of the preclear script.  One drive had no issuse, yet the other one had a few.  I'm posting the Smart report for the drive in question.

 

================================================================== 1.15

= unRAID server Pre-Clear disk /dev/sdc

= cycle 3 of 3, partition start on sector 1

=

= Step 1 of 10 - Copying zeros to first 2048k bytes DONE

= Step 2 of 10 - Copying zeros to remainder of disk to clear it DONE

= Step 3 of 10 - Disk is now cleared from MBR onward. DONE

= Step 4 of 10 - Clearing MBR bytes for partition 2,3 & 4 DONE

= Step 5 of 10 - Clearing MBR code area DONE

= Step 6 of 10 - Setting MBR signature bytes DONE

= Step 7 of 10 - Setting partition 1 to precleared state DONE

= Step 8 of 10 - Notifying kernel we changed the partitioning DONE

= Step 9 of 10 - Creating the /dev/disk/by* entries DONE

= Step 10 of 10 - Verifying if the MBR is cleared. DONE

= Disk Post-Clear-Read completed DONE

Disk Temperature: 33C, Elapsed Time: 110:54:38

========================================================================1.15

== WDCWD40EZRX-00SPEB0 WD-WCC4E1NJJ0PH

== Disk /dev/sdc has been successfully precleared

== with a starting sector of 1

============================================================================

** Changed attributes in files: /tmp/smart_start_sdc /tmp/smart_finish_sdc

ATTRIBUTE NEW_VAL OLD_VAL FAILURE_THRESHOLD STATUS RAW_VALUE

Reallocated_Sector_Ct = 197 200 140 ok 100

Temperature_Celsius = 119 120 0 ok 33

Reallocated_Event_Count = 199 200 0 ok 1

No SMART attributes are FAILING_NOW

 

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

0 sectors were pending re-allocation after pre-read in cycle 1 of 3.

0 sectors were pending re-allocation after zero of disk in cycle 1 of 3.

292 sectors were pending re-allocation after post-read in cycle 1 of 3.

0 sectors were pending re-allocation after zero of disk in cycle 2 of 3.

3 sectors were pending re-allocation after post-read in cycle 2 of 3.

0 sectors were pending re-allocation after zero of disk in cycle 3 of 3.

1 sector is pending re-allocation at the end of the preclear,

a change of 1 in the number of sectors pending re-allocation.

0 sectors had been re-allocated before the start of the preclear.

100 sectors are re-allocated at the end of the preclear,

a change of 100 in the number of sectors re-allocated.

root@Tower:/usr/local/emhttp#

 

 

 

I'm just not too sure about the re-allocation count over the course of the preclears. Is this a low enough number that the drive should remain in good condition for a while, or should I RMA it now?  Thanks for the help.

WDC_WD40EZRX-00SPEB0_WD-WCC4E1NJJ0PH.txt

If you just bought I would return it if possible and get a new one or if you cannot return it then I would RMA it. Your smart report is still showing a pending sector: 197 Current_Pending_Sector  0x0032  200  200  000    Old_age  Always      -      1

Ok I'll start the return process. That is very disappointing. I bought these drives to start moving over my current 40TB windows 2012 drive pool. I was really excited to start work on it as the preclear a took about 100hrs. Oh well. Better to find out their bad now then when they have data on them. Thanks Archedraft for the help. 

You're welcome and yes much better to find out before you start all the data transfer. Although I know the feeling of buying a brand new hard drive and not being able to play with it for a few days!