When is it a bad idea to do double spare? Does it hurt IOPS? Does it help?
Currently I have 18 450's. Going to add 6 more in a week.
Moved off of 146g disks (18) killed that disk group and retired disks.
I have 3 disk shelf's.
So I just wanted to get the skinny on double protection and if it was dumb.
We selected double becuase we just don't want the array to fail if we can help it.