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Managing Disks - Certify, Verify, Initialize
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Just wondering if this is normal or not.
I have a Thunderbay mini with 4 2 TB drives. I certifieded the drives and one of them failed out with too many errors. So I bought 2-3 TB drives that were on sale at a local retailer. One to replace the bad 2TB drive and on to have ready incase of a future drive failure.
So on certifying these drives they started off at about 68 hours and are now showing nearly 300 hrs to certify after a day and a half.
This seems off as the original 2TB drives certified in about a day and a half.
If it was only one of the drives I could believe that it was one faulty drive... but 2 of them?
Posted : 25/03/2017 1:22 pm
Generally a disk should never fail a certify, expecially in a solid enclosure like a Thunderbay or Thunderbay mini. So disk errors mean something is not reliable. If a disk gets reallocated sectors, that is a certain sign that you should not use that disk (return it as DOA) and if it is an older disk, starting to reallocate sectors that is a sign it is starting to fail and should no longer be used with important data.
The long certify seems abnormal, but let it continue. You can check using Activity Monitor what the throughput speed is. Note that in the write pass on 2.5 inch drives, the estimated time can increase quite significantly, then will reduce when back on a read cycle.
Posted : 25/03/2017 11:23 pm
