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UniFi Lab 11

NVR drive failure

A UNVR shows a drive warning. Swap one, let it repair.

ProtectUNVR · 4 baysHot swap

Your job: replace the bad drive while the UNVR stays on, let storage finish Repairing, and get every bay to Optimal. One drive at a time.

This run: Break A. Bay 2 reads Drive at Risk of Failure. Bays 1, 3, 4 Optimal.

UNVR storage

Protected, warning · Bay 2 at risk

Protected, warning · Bay 2 at risk

Goal: One drive at a time, storage repaired

Bays Shelf

Storage

UNVR · 4 x 8 TB · Basic Protection (RAID 5)
StorageProtectedlab label

Warning: Bay 2 reads Drive at Risk of Failure.

12 cameras · Recording on

  • Bay 18 TB

    Optimal

  • Bay 28 TB

    Drive at Risk of Failure

  • Bay 38 TB

    Optimal

  • Bay 48 TB

    Optimal

Spare shelf

Tap a drive, then tap a bay.

Controls

UNVR

Protection
Basic (RAID 5)
Protects against
1 drive failing
Cameras
12 recording
Power
On

Good to know · info only

Out of scope for this lab

Changing RAID level Teleport Storage Budgeting Super Encoding Drive brands and models SMART thresholds UNAS multi-group pools CloudKey+ storage · Lab 10

Why this fails

Bay 2: Drive at Risk of Failure

RAID 5 can lose one drive and keep recording. An at-risk drive is a warning to act now. Swap that one drive while the NVR runs, same size or bigger, and let it repair.

Field note

One drive at a time. Repair is heavy work and slows things down until it finishes. A smaller drive will not join. A bigger one works, but the extra space sits unused until every drive is that size.

Why Broken and Fixed
D11 RAID 5 drive loss, BrokenBroken. Four drives, RAID 5. Bay 1 out: still recording. Bay 1 and Bay 3 out: lost.BrokenRAID 5Bay 1Bay 2Bay 3Bay 4One out: still recordingBay 1Bay 2Bay 3Bay 4Two out: lostD11 RAID 5 drive loss, FixedFixed. Swap one drive, Bay 1: Repairing. Then every bay Optimal.FixedRAID 5Bay 1Bay 2Bay 3Bay 4Swap one: RepairingBay 1Bay 2Bay 3Bay 4Then: all Optimal
One out: still recording. Two out: lost.

Drive states

  • OptimalDrive is healthy and in the pool.Showing
  • Drive at Risk of FailureStill working. A warning to act now.Showing
  • Failed, not detectedDrive failed. Protection used up.Clear
  • RepairingNew drive joining. Wait for it to finish.Clear
  • Smaller Size DriveWill not join. Use equal or larger.Clear
  • UniFi Data FoundFrom another console type. Format to use.Clear
  • Reduced StorageExtra capacity is not used.Clear

Glossary

Basic Protection
RAID 5 with 3 or more drives. Protects against 1 drive failing.
Hot swap
Replace a drive while the UNVR stays on.
Repair
Rebuilds the pool onto the new drive. Slows things down until it finishes.

Gear in this lab

  • 1 UNVR (4 bays)
  • 4 8 TB drives
  • 12 Cameras
Change on win: none yet

Counts only, no prices. No drive brand named.

A teaching lab, not a quote and not a design for your site. Drive state labels follow UniFi wording. The storage status line, the repair percent and Undo are lab only.