How common are power supply failures in comparison to hard disk failures?

Posted by Adrian Grigore on Server Fault See other posts from Server Fault or by Adrian Grigore
Published on 2011-01-10T16:48:01Z Indexed on 2011/01/10 16:55 UTC
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server

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Hardware

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reliability

Hi,

My webhost offers two different types of high availability options for dedicated servers:

Redundant hard disks (RAID1)
Redundant hard disks (RAID1) plus redundant power supply

How common is a power supply failure in comparison to hard disk failure? I know it's not possible to know the exact figures without knowing the exact hardware, but ballpark figures are good enough for me at the moment.

Thanks,

Adrian

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