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14812 posts

Uber Geek
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# 138318 30-Dec-2013 09:42
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I have a half dozen hard drives for offline/offsite backups, mostly Seagate Barracuda between 1TB and 3TB, mostly 2-4 years old. Most of them have only been spun up between 20 and 100 times. Most have never been filled, I do a full format when I get them then add data as I create it.

Almost all of them are getting SMART errors, especially reallocated sector counts. Should I immediately replace a disk with a reallocated sector count above one? Or only if it climbs? It's a little difficult to track them, since the hard drives are usually offsite.

My internal disks are mostly Seagate, with one WD drive, and they're used every day. They spin up, spin down, probably dozens of times a day. Those drives rarely have problems, though one did generate a SMART warning so I replaced it.

Is any brand/model of drive more suitable for use as offsite backups, rarely spun up? I think i'd try western digital, but do I go black (have one, good, fast, 5 yr warranty), red (nas focused, 3 yr warranty), blue and green not so interested.

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844 posts

Ultimate Geek
+1 received by user: 200

  # 959559 31-Dec-2013 12:57
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There is no answer to this conundrum and I would suggest that you try to address the problem by sneaking up to from another direction.

Try this question:

"Is there a strategy that I could use for drive selection and replacement that will guarantee that I will never have any form of drive failure in service?"

That is an easy one to answer and the answer is no.

So that tells you that there is no alternative to using a storage scheme that will protect you against failures. Choose the right scheme using best practice and drive failure becomes a non-problem. You just pop in a replacement drive and follow your chosen recovery procedure.

Once that is sorted out, you no longer have to torture yourself by worrying about the smart status on all those drives that you have been hiding under rocks on the Coromandel. Just wait until a drive dies and then replace it per your previously worked out and trusted routine.

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