Hi guys. I decided to rebuild my server. I needed to modify the case so I can shove more drives in it. Ordered a new SAS card so, in the meantime, I decided to preclear some of the drives that I have. These are not new but, for the most part, have not seen heavy use and are all WD red or blacks (FALLS). I need help interpreting the results on a 3TB red to see if I should use it in my array. Since the results are different from the others, I am asking for an opinion. It did pass the preclear.

 

Disk sdg has successfully finished a preclear cycle!

Ran 3 cycles.
Last Cycle`s Pre-Read Time: 0:44:06 @ 151 MB/s.
Last Cycle`s Zeroing Time: 7:07:36 @ 116 MB/s.
Last Cycle`s Post-Read Time: 0:45:47 @ 148 MB/s.
Last Cycle`s Elapsed TIme: 8:37:38
Disk Start Temperature: 26 C
Disk Current Temperature: 27 C


S.M.A.R.T. Report
ATTRIBUTE INITIAL CYCLE 1 CYCLE 2 CYCLE 3 STATUS
5-Reallocated_Sector_Ct 371 378 382 383 Up 12
9-Power_On_Hours 12788 12797 12805 12814 Up 26
194-Temperature_Celsius 26 28 28 27 Up 1
196-Reallocated_Event_Count 7 7 7 7 -
197-Current_Pending_Sector 1 1 1 4 Up 3
198-Offline_Uncorrectable 0 0 0 0 -
199-UDMA_CRC_Error_Count 222 222 222 222 -
SMART overall-health self-assessment test result: PASSED

 

So, the reallocated sector and current pending sector count is what is stumping me.

Don
 

My personal opinion is that you should RMA that drive.  It is currently unstable and I would not want it on my array!  If it had some Current Pending Sectors at the beginning and those had been reallocated with any any increase in the Reallocated Sectors after the first pass, it might have acceptable.  (Depending on your aversion to risk...)

Well, no RMA. The drive is out of warranty. I was not sure but, I think I will keep it for something else. It use to be part of the array but had to take it out because Unraid locked out the drive.and I kept it too long to be able to RMA. I guess the 1000000 hours MTBF is a little exaggerated since mine has under 13000 hours. I do have one exact same drive with approx. same amount of hours that had an orange triangle on the main page. I think it was for pending sectors. I will have to check that out when I fire it back up. Is there anyway I can check that with the disk still part of the array?

Don

Sorry, I looked at the number of hours and figured the drive was a less than a year-and-half old and WD Red's have a three year warranty.  I am assuming that you did try for an RMA at the WD site as it never hurts to try. 

 

BTW, the MTBF is not quite what you think the number means.  It is developed statistically and is the number of failures that could be expected in a large number of drives over their total operating hours.  Think of 1000 drives running for 1000 hours with one failure will give the number you quoted.