We have 20 2TB SATA drives to be used in a ZFS pool. I am after some advice on the best way to achieve good I/O performance, whilst being able to offer some redundancy (3 disk failures before data loss is what we are looking to achieve).
I am bit confused as to whether I need to use mirroring or raidz.
The 20 drives will be plugged into 2 16-port raid controllers (10 on each controller). Maybe I create hardware raid volumes for each lot of 10 disks and then in zfs, then mirror the two available raid volumes, thus creating one super volume?
Any advice would be great.