2U RAID NAS -- big, fast, still not disaster-proof alone. The performance tier of the NAS lineup: more disks, more capacity, and by far the highest IOPS rating in the roster.
16 disks, 160TB usable, RAID10, 150000 IOPS, 32GB cache, 30% built-in redundancy chance. RAID10's own redundancy gives it real (if partial) odds of surviving a hardware fault entirely on its own, unlike the baseline NAS tier.
That 30% figure is a per-fault roll, not a guarantee -- it materially improves your odds versus the baseline tier's 0%, but it's still meaningfully worse than the Backup Appliance's dedicated 50%, and it's not a substitute for an actual `backupOfNasDeviceId` mirror share if the data is genuinely important.
The IOPS headroom is the real reason to pick this over the baseline tier for demanding clients -- a Client Contract that specifically stresses storage throughput is where the 2x U cost and higher power draw actually pay for themselves.
Tip: don't let the built-in redundancy chance talk you out of also configuring a real mirror share for anything mission-critical -- treat the 30% as a bonus safety margin on top of a real backup, not instead of one.
See also: the Game Systems manual's Data Management section for backup mirrors and disaster recovery.