Synology DS920 Synology High Availability SHA Troubleshooting Guide for DSM 7. - Page 48

Repair abnormal volumes, 3.1 Repair volumes on the passive server

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Chapter 2: SHA Troubleshooting 2.3 Repair abnormal volumes 2.3.1 Repair volumes on the passive server Missing storage space or SSD cache Missing storage spaces or SSD caches are caused by drives being installed incorrectly or drives being moved to different slots. In this case, the passive server's storage space may be unavailable.1 Reassemble the volume 1. On the active server, go to Storage Manager and click on the storage pools to check which drive is missing. 2. Install the drive into the correct slot on the passive server. 3. Go to Storage Manager > Storage. Select the pool with the "Missing" status and click Assemble. 4. A message will pop-up confirming that the system will reassemble the volume. Recreate the volume If your volume cannot be repaired via the method above, you can try to remove and recreate the volume instead. Doing this will erase the passive server data. Once the volume is repaired, the system will need to synchronize all of the active server data to the passive server. Please note that switchover and auto-failover will not be available during synchronization. 1. On the active server, go to Storage Manager and check which drive is missing. 2. Install a new drive into the correct slot on the passive server. 3. Go to Storage Manager > Storage. Select the storage pool with the "Missing" status and click Repair. 4. A message will pop-up confirming that the system will repair the volume and erase all of the data on the drive. Notes: 1. If only the read-only cache is missing, the data on the passive server will still be available. Crashed storage space or SSD cache Crashed storage spaces or SSD caches are usually caused by drive errors. You will need to replace the drive with a healthy one and recreate the volume. In the case of a crashed volume, the passive server data may be unavailable.1 1. On the active server, go to Storage Manager to find out which storage pool the crashed volume belongs to. 2. Go to Storage Manager > HDD/SSD to find out which drive crashed and replace it with a healthy one. 46

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46
Chapter 2: SHA Troubleshooting
2.3 Repair abnormal volumes
2.3.1 Repair volumes on the passive server
Missing storage space or SSD cache
Missing storage spaces or SSD caches are caused by drives being installed incorrectly or
drives being moved to different slots. In this case, the passive server’s storage space may be
unavailable.
1
Reassemble the volume
1. On the active server, go to
Storage Manager
and click on the storage pools to check which
drive is missing.
2. Install the drive into the correct slot on the passive server.
3. Go to
Storage Manager
>
Storage
. Select the pool with the "Missing" status and click
Assemble
.
4. A message will pop-up confirming that the system will reassemble the volume.
Recreate the volume
If your volume cannot be repaired via the method above, you can try to remove and recreate
the volume instead. Doing this will erase the passive server data. Once the volume is repaired,
the system will need to synchronize all of the active server data to the passive server. Please
note that switchover and auto-failover will not be available during synchronization.
1. On the active server, go to
Storage Manager
and check which drive is missing.
2. Install a new drive into the correct slot on the passive server.
3. Go to
Storage Manager
>
Storage
. Select the storage pool with the “Missing” status and
click
Repair
.
4. A message will pop-up confirming that the system will repair the volume and erase all of the
data on the drive.
Notes:
1. If only the read-only cache is missing, the data on the passive server will still be available.
Crashed storage space or SSD cache
Crashed storage spaces or SSD caches are usually caused by drive errors. You will need to
replace the drive with a healthy one and recreate the volume. In the case of a crashed volume,
the passive server data may be unavailable.
1
1. On the active server, go to
Storage Manager
to find out which storage pool the crashed
volume belongs to.
2. Go to
Storage Manager
>
HDD/SSD
to find out which drive crashed and replace it with a
healthy one.