[OM] Re: CD, DVD lives, July 2005

[Jeff Keller]

If you power cycle it once a week for 10 years, that's 520 power cycles. I 
think the chance of a failure is essentially zero. If you leave it running 
24/7 that's about 90,000 hours which is still below the MTBF of most drives 
(200,000 hours or more IIRC).
-jeff

----Original Message Follows----
From: Wayne Harridge <wayneharridge@xxxxxxxxxxxxxxx>

Keep in mind that you may actually be reducing the MTBF of the drives by 
using them in this way due to thermal & electrical cycling.  There are many 
factors to consider, but you might be better off keeping these drives 
powered up continuously.

...Wayne


 > Chuck Norcutt <chucknorcutt@xxxxxxxxxxx> wrote:
 >
 >   I have no concerns about their electronic or mechanical
 > life since the only time they're ever powered on is when they're
 > actually performing a backup which is, at most, once a week.



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