> My zpool is now the appropriate number of disks (2^n + parity) in the VDEVs. So I have one 18 disk RAIDZ2 VDEV (2^4+2) and one 6 disk RAIDZ2 VDEV (2^2+2) for a total of twenty-four drives.
That's a catastrophe waiting to happen. EMC recommends no more than 8 disks in a parity array group (ZFS recommends no more than 9), specifically because larger arrays cause longer rebuilds, which are more likely to trigger a URE, in which case your SOL.
That's a catastrophe waiting to happen. EMC recommends no more than 8 disks in a parity array group (ZFS recommends no more than 9), specifically because larger arrays cause longer rebuilds, which are more likely to trigger a URE, in which case your SOL.