Server Building > Hard Drives and Controllers
Preclear and Failed Drives
vca:
--- Quote from: Rajahal on April 27, 2011, 01:48:15 PM ---I have also seen a few drives that took exceedingly long on the first cycle (like 2x or longer than normal), but still passed, then ran at normal speed on all subsequent cycles. These drives have all turned out to be fine in normal use. I can't explain why the first pass took so long.
--- End quote ---
I've had one drive that was slow on the first preclear pass (it took about twice as long as normal) and was just as slow on the second pass, so I took it back to the dealer and got a replacement.
Stephen
Joe L.:
In my case a brand new Seagate 2TB ST32000542AS drive passed the first preclear, but with some sectors re-allocated.
The second preclear it re-allocated LOTS of sectors, started making LOTS of funny noises, and failed completely.
Superorb:
--- Quote from: Joe L. on April 28, 2011, 12:50:29 PM ---In my case a brand new Seagate 2TB ST32000542AS drive passed the first preclear, but with some sectors re-allocated.
The second preclear it re-allocated LOTS of sectors, started making LOTS of funny noises, and failed completely.
--- End quote ---
Lesson learned. On my new drive I just got I'm going to do 3 clears instead of the single clears I did on my older drives that have been in service for months.
DoeBoye:
For the record, I voted as a one time pre-clear, but I've since started pre-clearing 3 times because of this thread! It helps to buy drives well ahead of when they are actually needed :)
DB.
KYThrill:
This poll reminds me of my Hitachi 7k2000 parity drive that passed two pre-clears, was in service 6 months, threw 5-10 errors, smart reported showed reallocated sectors, swapped in a spare drive, pre-cleared the erroring drive about 10-11 times. It failed all but the last two, but did pass the final two pre-clear attempts. I put it back into service as a data drive and it has been working perfectly for several months.
So I guess I don't see my choice. I preclear until the drive can pass two consecutive pre-clears, or until it reaches a failure criteria that would let me RMA it. Even though my Hitachi was failing one pre-clear after another, it would still pass the stupid Hitachi drive analysis test, so it wasn't eligible for RMA. So I was going to preclear that drive until it fried if that is what it took.
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