I have been reviewing MTBF for Cisco network equipment in order to
get some idea of reliability. Each component of a Cisco machine has
rated an MTBF >150,000hrs, so putting standby Processor engines and
power supplies could be overkill but would protect us against any
eventuality at approx. 35% cost increase. This was included in any
quotes I have made up.
These figures are rated at optimal cooling in the computer room.
My feeling is that current disk MTBF is much less than that figure,
and would propose writing a minimum of two sets on the summit to
maintain data integrity. If we have to drive disks down the mountain
in case of fibre failure we don't want that to be the only copy.
ron
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