A very counter-intuitive fact
Wednesday, March 17, 2010
4:54 PM
A very counter-intuitive fact
Disks age on average at roughly the same rate so that
It is a bad idea to deploy a batch at the same time because 
They'll all fail at roughly the same time. 
Human labor is required to replace a disk. 
Human labor is a bounded resource. 
Reason: the human part of the risk equation. 
Optimal strategy: trickle-deployment, renewing disks one at a time. 