Synology DS1621xs Synology High Availability SHA Troubleshooting Guide for DSM - Page 52

Chapter 2: SHA Troubleshooting If a different storage space or SSD cache on each server is abnormal If different errors occurred on different volumes on each server, follow the steps below: 1. Reassemble the missing volume on the active server and then reassemble the missing volume on the passive server. 2. Repair the read-only volume on the active server. 3. Repair the crashed volume or repair the read-only volume on the passive server. 4. Check if there is still a missing or crashed volume on the active server. If so, follow the instructions below: a. If the read-only cache is missing or crashed, remove the cache and re-create it. b. Go to Synology High Availability > Cluster, and check if the force-failover option is available. If it is available, follow the instructions in the Missing storage space or SSD cache section of 2.3.2 Repair volumes on the active server. Troubleshoot other errors on the passive server. 1. Check your logs, notifications, or emails for any errors that may have occurred on the passive server. 2. Make sure that the passive server is powered on and its Ethernet cable is connected properly. 3. If none of the above methods worked, refer to Chapter 3: Contact Customer Service to contact Synology Technical Support for further assistance. 4. Repair the degraded volume on the active server and then repair the degraded volume on the passive server. 2.3.4 Repair an abnormal SSD cache 1. On the active server, go to Storage Manager to find out which SSD cache is abnormal. 2. Go to Storage Manager > HDD/SSD to find out which drive is abnormal and replace it with a healthy one. 3. Go to Storage Manager > Storage. Select the storage pool where the abnormal SSD cache belongs and click Repair. 50