On Sun, 5 Feb 2006, David Liontooth wrote:
In designing an archival system, we're trying to find data on when it
pays to power or spin the drives down versus keeping them running.
Is there a difference between spinning up the drives from sleep and from
a reboot? Leaving out the cost imposed on the (separate) operating
system drive.
Hitachi claims "5 years (Surface temperature of HDA is 45°C or less) Life
of the drive does not change in the case that the drive is used
intermittently." for their ultrastar 10K300 drives. I suspect that the
best estimates you're going to get is from the manufacturers, if you can
find the right documents (OEM specifications, not marketing blurbs).
For their deskstar (sata/pata) drives I didn't find life time estimates
beyond 50000 start-stop-cycles.
/Mattias Wadenstein
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