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How do I repair a degraded or crashed SSD cache in an HA cluster?

Hvordan reparerer jeg en degraderet eller nedbrudt SSD-cache i en HA Klynge?

Last modified date: 2025-07-03

Applicable Products

QuTS hero h5.3.0 or later
High Availability Manager
Storage Manager

Scenario

While using QNAP NAS with high availability (HA) enable, I received a system warning indicating an SSD cache issue. One or more cache disks are reported as degraded or crashed. How can I repair or replace the faulty disks without interrupting ongoing services?

Procedure

Before you begin, please do the following:

Back up important data.
Always back up your data before performing disk operations to mitigate the risk of data loss.
Identify the faulty SSD(s).
1. Go to Storage Manager > Disks > Disk.
2. Identify the SSDs with “Cache” listed under the column header Usage Type.
3. Identify the SSDs with “Error” or “Warning” listed under the column header Status.
Determine whether hot-swapping is supported for the drive bays/slots where your faulty SSDs are installed.
Tip
- 3.5-inch or 2.5-inch drive bays usually support hot-swapping.
- Drive slots that require access to the system board (such as M.2) usually do not support hot-swapping.
- To determine hot-swapping support for drive bays/slots on your specific model, download and check the hardware user guide for your model in Download Center.
Follow the relevant instructions depending on whether hot-swapping is supported:

Case 1: Hot-swapping supported

Replace the faulty disk.
1. Remove the faulty disk.
2. Install a healthy disk of the same or larger capacity in the same slot.
  The system automatically detects the new disk.
If the SSD cache is degraded, the system will automatically start rebuilding the cache RAID.
Note
If the system does not automatically start rebuilding, try setting the new disk as a spare disk to trigger the rebuild process.
If the SSD cache crashed, manually remove and recreate the SSD cache.
1. Go to Storage Manager > Cache Acceleration.
2. Remove the SSD cache.
  For details, see Removing the SSD cache.
  The system automatically flushes cached data back to the storage pool.
3. Recreate the SSD cache.
  For details, see Creating the SSD cache.

Case 2: Hot-swapping not supported

If the faulty disk is on the active node, switch the node role to passive node by performing a switchover.
If the faulty disk is on the passive node, skip to the next step.
1. Go to High Availability Manager > Cluster.
2. Click Manage, and then select Switch Over.
  The original active node becomes the passive node.
Shut down the passive node.
1. Go to High Availability Manager > Nodes.
2. Identify the passive node.
3. Click , and then select Shut Down.
Replace the faulty disk.
1. Remove the faulty disk.
2. Install a healthy disk of the same or larger capacity in the same slot.
Power on the passive node.
After the passive node starts, it automatically rejoins the HA cluster.
Switch the passive node’s role to active node.
SSD cache is managed by the active node. To repair the SSD cache, the host NAS must be in the active node role.
1. Go to High Availability Manager > Cluster.
2. Click Manage, and then select Switch Over.
  The passive node is now the active node.
If the SSD cache is degraded, the system will automatically start rebuilding the cache RAID.
Note
If the system does not automatically start rebuilding, try setting the new disk as a spare disk to trigger the rebuild process.
If the SSD cache crashed, manually remove and recreate the SSD cache.
1. Go to Storage Manager > Cache Acceleration.
2. Remove the SSD cache.
  For details, see Removing the SSD cache.
  The system automatically flushes cached data back to the storage pool.
3. Recreate the SSD cache.
  For details, see Creating the SSD cache.

Tip

After replacing a disk, we recommended performing a switchover to ensure that the switchover/failover mechanism works properly and that HA functionality has been restored.

Anvendelige produkter

QuTS hero h5.3.0 or later
High Availability Manager
Storage Manager

Scenario

Mens jeg bruger QNAP NAS med Høj tilgængelighed (HA) aktiveret, modtog jeg en systemadvarsel, der indikerer et SSD-cacheproblem. En eller flere cache-diske rapporteres som nedgraderede eller nedbrudte. Hvordan kan jeg reparere eller udskifte de defekte diske uden at afbryde igangværende tjenester?

Procedure

Før du begynder, skal du gøre følgende:

Sikkerhedskopier vigtige data.
Sikkerhedskopier altid dine data, før du udfører diskoperationer for at mindske risikoen for datatab.
Identificer de defekte SSD'er.
1. Gå tilLager Manager > Diske > Disk.
2. Identificer SSD'erne med “Cache” angivet under kolonneoverskriftenBrugstype.
3. Identificer SSD'erne med “Fejl” eller “Advarsel” angivet under kolonneoverskriftenStatus.
Bestem om hot-swapping understøttes for de drevpladser/slots, hvor dine defekte SSD'er er installeret.
Tip
- 3,5-tommer eller 2,5-tommer drevpladser understøtter normalt hot-swapping.
- Drevslots, der kræver adgang til systemkortet (såsom M.2), understøtter normalt ikke hot-swapping.
- For at bestemme hot-swapping support for drevpladser/slots på din specifikke model, download og tjek hardwarebrugervejledningen for din model i Download Center.
Følg de relevante instruktioner afhængigt af om hot-swapping understøttes:

Case 1: Hot-swapping understøttet

Udskift den defekte disk.
1. Fjern den defekte disk.
2. Installer en sund disk med samme eller større kapacitet i samme slot.
  Systemet registrerer automatisk den nye disk.
Hvis SSD-cachen er nedgraderet, vil systemet automatisk begynde at genopbygge cache-RAID'et.
Bemærk
Hvis systemet ikke automatisk begynder at genopbygge, prøv at indstille den nye disk som en reservedisk for at udløse genopbygningsprocessen.
Hvis SSD-cachen er nedbrudt, fjern og genskab SSD-cachen manuelt.
1. Gå tilLager Manager > Cache Acceleration.
2. Fjern SSD-cachen.
  For detaljer, se Fjernelse af SSD-cachen.
  Systemet skyller automatisk cachelagrede data tilbage til Lager poolen.
3. Genskab SSD-cachen.
  For detaljer, se Oprettelse af SSD-cachen.

Case 2: Hot-swapping understøttes ikke

Hvis den defekte disk er på den aktive node, skal du skifte nodens rolle til passiv node ved at udføre en switchover.
Hvis den defekte disk er på den passive node, spring til næste trin.
1. Gå til High Availability Manager > Klynge.
2. Klik på Administrer, og vælg derefter Skift Over.
  Den oprindelige aktive node bliver den passive node.
Luk den passive node ned.
1. Gå tilHigh Availability Manager > Noder.
2. Identificer den passive node.
3. Klik på, og vælg derefterLuk ned.
Udskift den defekte disk.
1. Fjern den defekte disk.
2. Installer en sund disk med samme eller større kapacitet i samme slot.
Tænd for den passive node.
Efter den passive node starter, genindtræder den automatisk i HA Klynge.
Skift den passive nodes rolle til aktiv node.
SSD-cachen administreres af den aktive node. For at reparere SSD-cachen skal værts-NAS'en være i den aktive node-rolle.
1. Gå til High Availability Manager > Klynge.
2. Klik på Administrer, og vælg derefter Skift Over.
  Den passive node er nu den aktive node.
Hvis SSD-cachen er nedgraderet, vil systemet automatisk begynde at genopbygge cache-RAID'et.
Bemærk
Hvis systemet ikke automatisk begynder at genopbygge, prøv at indstille den nye disk som en reservedisk for at udløse genopbygningsprocessen.
Hvis SSD-cachen er gået ned, fjern og genskab SSD-cachen manuelt.
1. Gå tilLager Manager > Cache Acceleration.
2. Fjern SSD-cachen.
  For detaljer, se Fjernelse af SSD-cachen.
  Systemet skyller automatisk cachelagrede data tilbage til Lager poolen.
3. Genskab SSD-cachen.
  For detaljer, se Oprettelse af SSD-cachen.

Tip

Efter udskiftning af en disk anbefaler vi at udføre en switchover for at sikre, at switchover/Failover mekanismen fungerer korrekt, og at HA-funktionaliteten er blevet gendannet.

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