Check whether a UniFi NVR RAID transition requires reformatting

Match the exact model, drive count, and target layout to the vendor’s reformatting table before changing RAID.

Source facts

UniFi’s storage guide distinguishes RAID transitions by recorder model, current layout, drive count, and target layout. Its ENVR table shows that adding a hot spare to a full 16-drive RAID 5/6 configuration requires reformatting, while the listed one-to-fifteen-drive transition does not. The same table marks transitions from RAID 5/6, with or without a hot spare, to RAID 10 as requiring reformatting. For existing NVR arrays, adding or replacing drives triggers a rebuild and can temporarily affect performance.

Source: Ubiquiti Help Center — Storage Protection and Data Redundancy in UniFi (RAID).

Applicability

Applies to the UNVR/ENVR transition tables in the current UniFi storage guide, with the ENVR examples stated above. Do not apply those examples to UNAS, ENAS, or a different drive layout.

DSE recommendation

DSE recommends checking the exact transition row before approving a storage-protection change. Record the model, bay occupancy, current RAID state, desired target, and whether the vendor marks it destructive. Preserve required footage and configurations independently before any reformatting path. Plan a maintenance window and acceptance criteria for the rebuilt system. Avoid treating an apparently empty usable-capacity display or a hot-spare label as permission to improvise a different disk sequence.

Verification

Have a second qualified reviewer compare the planned operation with the current model-specific table. After the approved change, inspect array state, camera recording, playback, and actual usable capacity. Record completion of rebuild and preservation checks; do not claim that changing RAID protection replaces the need for a separate recoverable evidence copy.

Official reference

Ubiquiti Help Center — Storage Protection and Data Redundancy in UniFi (RAID). Reviewed October 15, 2026.