NZSAN2 is up (has been since the outage). Outage was caused by a bad hard drive locking up the entire array, we are unsure why this happened but could replicate the problem with our hard drive testing software. The hard drive was replaced at the time of the outage, a parity check was completed without error. As at 7/12/18 9am the system is 50% through adding the new disk to the RAID6 volume.