Comment by lijok
You don’t raid old drives as it creates cascading failures because recovering from a failed drive adds major wear to other drives
You don’t raid old drives as it creates cascading failures because recovering from a failed drive adds major wear to other drives
This is less of a concern with RAID 6, and especially in Glacier's use case where reading any piece of data happens seldom, I'd expect it to be fine.
Only if you have low redundancy. RAIDZ is better about this isn’t it? And Backblaze goes a lot farther. They just decommission the rack when it hits the limit for failed disks, and the files on the cluster are stored on m of n racks, so adding a rack and “resilvering” doesn’t even require scanning the entire cluster, just m/n of it.