[Tech] Hardware Requirements for new server

[Devon at green-rainbow.org]

Looks like storage diversity, perhaps even tape backup, wins big.

http://www.usenix.org/events/fast07/tech/schroeder.html
...
Contrary to common and proposed models, hard drive replacement rates
do not enter steady state after the first year of operation.
Instead replacement rates seem to steadily increase over time.
...
SATA ... not worse than ... SCSI or FC disks.
...
strong ... correlations between disk replacement interarrivals ...
significant ... autocorrelation and long-range dependence.
...

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