Z2 means you'll have two parity disks, like in RAID-6. That should be okay. The trouble with RAID-5 are the rebuild times that rise to multiple days with modern disk sizes. The duration of time you run effectively without redundancy grows uncomfortably large. Especially if you don't have a hot or even cold spare around.
Z2 means you'll have two parity disks, like in RAID-6. That should be okay. The trouble with RAID-5 are the rebuild times that rise to multiple days with modern disk sizes. The duration of time you run effectively without redundancy grows uncomfortably large. Especially if you don't have a hot or even cold spare around.