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Very large scale study of hard drive failures (PDF)A very heavy read.

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Posted by Robert: Wed Jul 11th, 2012 07:26

1^st Post

To save folks reading the entire PDF. My head still hurts!

SMART status reports are not to be relied upon. 'Good' SMART status drives can still fail...

High temperature and heavy usage are found not to correlate to failures. Infant (<3 months) and elderly (>5 years) drives appear to fail most.

http://static.googleusercontent.com/external_content/untrusted_dlcp/research.google.com/en//archive/disk_failures.pdf

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Posted by jk: Wed Jul 11th, 2012 07:36

2^nd Post

Certainly agree with the statement.....Infant (5 years) drives appear to fail most.

I think the difference between makes is minor.

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Posted by Squarerigger: Wed Jul 11th, 2012 07:53

3^rd Post

Seems to be the norm in my experience with most electronic items I purchase. It either craps out right away and you replace under warranty. Or it lasts a long time. Very little in between time failures.

I think that is why extended warranties are not usually a good thing. If the item craps out early it is covered by the general warranty. If you get the extended warranty, and it craps out after 5 years or so, you would probably want to replace it anyway as technology will have past it several times over.

Extended warranties = the company is betting it will last and you are betting it won't.

Thanks Robert for sifting through all that information.

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Gary

Posted by Doug: Thu Jul 12th, 2012 11:03

4^th Post

Bathtub Curve - Link

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Posted by Squarerigger: Thu Jul 12th, 2012 12:16

5^th Post

Doug wrote:
Bathtub Curve - Link
:-O Thanks Doug! You had to go an dredge this up and wake up nightmares from my past. Suddenly I started thinking of MTBF (mean time between failures) and RAM ( reliability, availability, and maintainability) all terms I had hoped to never hear again. Sweat, sweat - trying to do RAM engineering studies and in my ancient days trying to schedule main frame computer times to run programs.

I need a drink :wine:

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Posted by jk: Thu Jul 12th, 2012 17:57

6^th Post

I thought that bath tub failure was a thing of the past, a quaint old concept like 'Great' Britain rather than United Kingdom. However maybe with Scotland angling for independence it should be dis-United Kingdom.

No tea and crumpets these days!

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