ZFS's documentation is as good as the docs for expensive storage. (HEllo IBM redbooks, they are _wonderful_) To use mdadm properly you need lvm as well. Which

ZFS's documentation is as good as the docs for expensive storage. (HEllo IBM redbooks, they are _wonderful_) To use mdadm properly you need lvm as well. Which means dealing with all the rubbish that come with it. (unrecoverable snapshots as a service? that might be fixed now.) > Regarding your RAID60 experience: it could be a bad batch of drives. Naaa it was the workload. We had 32 of these server that were largely identical, and bought in two batches. This one (it was actually two) server was running the blackhole fluid sim for interstella. These servers had all been up and running for well over a year. I should point out that with about 2000 drives for these servers, we would be replacing at least three disks a week. Normally they'd be spread evenly over all servers, it was unusual that this array ate ~7 drives in two weeks, with back to back rebuilds. Interestingly, the nearline machines which had 4x the drives, was much less likely to loose disks. (however they had a different usage pattern, virtually no random access, and it was one raid controller on the top 60 drive array, then three jbods daisy chained.)