>> RAID-5 and RAID-6 rebuild of 8 drive array would take a very long time, >> because not only it will have to recover (not just copy) the data from >> error correction data spread across all drives > Reading the data from all the drives is a positive rather than a negative: > it means the controller is reading from say, 7 drives to build data on > 1. That means a lot more idle cycles on the 7 as opposed to having 1 drive > 100% busy (which matters if you're trying to use the array during the > rebuild).
But you need to read all "other blocks" to compute a given missing block, so it takes 6x more reading to rebuild your array than with a raid 1/10. === Stefan
