ZFS FTW Again...
Big problem here is proprietry raid format preventing the moving of data from one system to another due to the controller lock-in.
ZFS being software raid doesnt mean your locked in to any particular controller/system.
Rebuild times with ZFS, because the file system and volume manager are combined (not seperate like RAID card and FILE system ontop seperately), means rebuild times are equivelant to the amount of data on the disk. Rebuilds are also top down from the file system structure meaning most important data is rebuilt first (and thus available first). Not having to wait for every block to be re-done before even the probably good blocks are available...
admittedly it wouldnt have helped againt the WD uptime problem of 59 days, but it would have been easier to restore, wouldnt have needed a 'rebuild', and would have been back online much quicker.
my home atom (passively cooled) 6tb raidz atom 400quid home server could pull 1TB over the lan in just over 4 hours.
Can scrub it once per week aswell to ensure no data loss or data coruption that other filesystems wouldnt even notice.
oh and dedupe, and tiered caching to SSD, and so on...
Its painful to get emails from IT about lack of space on a 1tb file server when storage is now so cheap and accessable.