I've been running eight 200TB boxes 6TB disks in raidz3 (14 disks in 3 spans) and they have been working quite well although rebuild times are obviously quite lengthy.
I'm afraid if I do 14 disks per span and I have to replace a disk it will become completely insane and untenable.
From what I can see my options for my 45 disk array are:
14 disks in 3 raidz3 groups @ 330TB usable + 3 spares max
11 disks in 4 raidz3 groups @ 320TB usable + 1 spare max
10 disks in 4 raidz3 groups @ 280TB usable + 5 spares max
I'm afraid if I do 14 disks per span and I have to replace a disk it will become completely insane and untenable.
From what I can see my options for my 45 disk array are:
14 disks in 3 raidz3 groups @ 330TB usable + 3 spares max
11 disks in 4 raidz3 groups @ 320TB usable + 1 spare max
10 disks in 4 raidz3 groups @ 280TB usable + 5 spares max