Synology DS1621xs Synology High Availability SHA Troubleshooting Guide for DSM - Page 49

Repair volumes on the active server, Storage Manager, Storage, Repair, HDD/SSD

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Chapter 2: SHA Troubleshooting 3. Go to Storage Manager > Storage. Select the crashed storage pool and click Repair. Notes: 1. The passive server data will still be available: • If the read-only cache is crashed. • If the data is written to a read-write cache. Degraded storage space or SSD cache Volume degradation is usually caused by drive errors. If your RAID type can sustain the drive failures when volume degradation occurs, then the data on the drive is temporarily safe. However, we recommend you to repair it as soon as possible to avoid future errors on other drives. 1. On the active server, go to Storage Manager to find out which storage pool the degraded volume belongs to. 2. Go to Storage Manager > HDD/SSD to find out which drive is degraded and replace it with a healthy one. 3. Go to Storage Manager > Storage. Select the degraded storage pool and click Repair. The time needed for repair depends on the size of the storage pool. The repair process may impact system performance. Read-only storage space or SSD cache Storage spaces or SSD caches become "read-only" when the storage pool has previously had an error, causing the system to designate the storage pool as read-only to safeguard data. 1. On the active server, go to Storage Manager to find out which storage pool is read-only. 2. Go to Storage Manager > HDD/SSD to find out which drive is read-only and replace it with a healthy one. 3. Go to Storage Manager > Storage. Select the storage pool where the read-only volume belongs and click Repair. After the volume is repaired, the system will need to synchronize all of the data from the active server to the passive server. Switchover and auto-failover are not available during synchronization. 2.3.2 Repair volumes on the active 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 active server's storage space may be unavailable.1 Reassemble the volume 1. On the active server, go to Storage Manager > Storage to see which slot is missing a drive. 47

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47
Chapter 2: SHA Troubleshooting
3. Go to
Storage Manager
>
Storage
. Select the crashed storage pool and click
Repair
.
Notes:
1. The passive server data will still be available:
• If the read-only cache is crashed.
• If the data is written to a read-write cache.
Degraded storage space or SSD cache
Volume degradation is usually caused by drive errors. If your RAID type can sustain the drive
failures when volume degradation occurs, then the data on the drive is temporarily safe.
However, we recommend you to repair it as soon as possible to avoid future errors on other
drives.
1. On the active server, go to
Storage Manager
to find out which storage pool the degraded
volume belongs to.
2. Go to
Storage Manager
>
HDD/SSD
to find out which drive is degraded and replace it with
a healthy one.
3. Go to
Storage Manager
>
Storage
. Select the degraded storage pool and click
Repair
. The
time needed for repair depends on the size of the storage pool. The repair process may
impact system performance.
Read-only storage space or SSD cache
Storage spaces or SSD caches become "read-only" when the storage pool has previously had
an error, causing the system to designate the storage pool as read-only to safeguard data.
1. On the active server, go to
Storage Manager
to find out which storage pool is read-only.
2. Go to
Storage Manager
>
HDD/SSD
to find out which drive is read-only and replace it with
a healthy one.
3. Go to
Storage Manager
>
Storage
. Select the storage pool where the read-only volume
belongs and click
Repair
. After the volume is repaired, the system will need to synchronize
all of the data from the active server to the passive server. Switchover and auto-failover are
not available during synchronization.
2.3.2 Repair volumes on the active 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 active server’s storage space may be
unavailable.
1
Reassemble the volume
1. On the active server, go to
Storage Manager
>
Storage
to see which slot is missing a drive.