QNAP Security VioStor NVR (Version: 4.1.1) - Manual (Page 151)

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Click the icons on the ‘SATA Disk’ page to format the hard disk drive(s).
Disk Configuration Applied NVR Models
Single disk volume All models
RAID 1, JBOD (just a bunch of disks) 2-bay models or above
RAID 5, RAID 6, RAID 5+hot spare 4-bay models or above
RAID 6+hot spare 5-bay models or above
Note: Do NOT turn off the server or unplug any hard drives when RAID rebuilding is in
process.