[AntonCTO]

RAID10 for 22TB disks with only two drives at "1" level? I would expect no less than 3 drives at such capacity. Otherwise there is a huge chance to lose the second drive while 1. changing the disc (=time, could be even days) and 2. replication.

What are your thoughts on implementing RAID 0 over four RAID 1 arrays, each consisting of three disks, resulting in a total of 12 drives?

[simonjgreen]

Agreed, 22TB is a _long_ rebuild time. I'd either go 3 drives in the mirror in that scenario, or go for smaller spindles, depending on requirements. It's not always about the biggest spindles possible.