Perconte wrote:
Im not to sure about the 7000 series, but we had to give 3Par a number of spare disks that we want to have in our F-series. Did you have to do the same?
That sets up the amount of spare chunklets which is good for determining how many disks overall you can lose without replacements if there's enough time between failures but it doesn't affect how many simultaneous disk failures you can survive. That's determined by raid type and whether you've enabled cage redundancy. Spare chunklets help you a bit if the failures are spread over time but I'd never crank it past defaults since HP should be out within a few hours with spares anyways.