Synology DS920 Synology High Availability SHA Troubleshooting Guide for DSM 7. - Page 24

Warning: Abnormal SSD cache configurations [Details: SSD cache

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Chapter 2: SHA Troubleshooting Resolution Related Notifications Possible Logs 1. Sign in to your high-availability cluster and go to Synology High Availability > Host. 2. On the passive server, click the power button and select Shut Down. 3. Refer to the information in your device's Hardware Installation Guide to install the memory module on the passive server. 4. Power on the passive server by pressing its power button. For more information, refer to Chapter 5.5: Memory expansion in the Synology High Availability (SHA) User Guide. • Status of high-availability cluster My_SHA_Hostname is abnormal [Details: The memory size is different on High-availability cluster My_SHA_ Hostname] • [warning] Auto failover is temporarily unavailable: The memory size is different on High-availability cluster My_SHA_Hostname. 2.2.14 Warning: Abnormal SSD cache configurations [Details: SSD cache may be unable to function due to different memory sizes installed on the host servers.] Warning Abnormal SSD cache configurations. Details: SSD cache may be unable to function due to different memory sizes installed on the host servers. Suggestion: Add memory to My_Active_Hostname (active server) to make sure the servers have the same memory size. Description SSD caches consume system memory. If each server has a different memory size, SSD cache may not be able to function on the server with the smaller memory. Cause The memory size on the active server is smaller than the one on the passive server. Resolution 1. Sign in to your high-availability cluster and go to Synology High Availability > Cluster. 2. Click on the power button and select Shut down cluster. 3. Refer to the information in your device's Hardware Installation Guide to install memory modules on both servers. 4. Power on each device in the cluster by pressing their individual power buttons. For more information, refer to Chapter 5.5: Memory expansion in the Synology High Availability (SHA) User Guide. 22

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22
Chapter 2: SHA Troubleshooting
Resolution
1. Sign in to your high-availability cluster and go to
Synology High
Availability
>
Host
.
2. On the passive server, click the power button and select
Shut Down
.
3. Refer to the information in your device’s
Hardware Installation Guide
to install the memory module on the passive server.
4. Power on the passive server by pressing its power button.
For more information, refer to
Chapter 5.5: Memory expansion
in the
Synology High Availability (SHA) User Guide
.
Related
Notifications
• Status of high-availability cluster My_SHA_Hostname is abnormal [Details:
The memory size is different on High-availability cluster My_SHA_
Hostname]
Possible Logs
• [warning] Auto failover is temporarily unavailable: The memory size is
different on High-availability cluster My_SHA_Hostname.
2.2.14 Warning: Abnormal SSD cache configurations [Details: SSD cache
may be unable to function due to different memory sizes installed on the
host servers.]
Warning
Abnormal SSD cache configurations.
Details
: SSD cache may be unable to function due to different memory sizes installed on the
host servers.
Suggestion
: Add memory to My_Active_Hostname (active server) to make sure the servers
have the same memory size.
Description
SSD caches consume system memory. If each server has a different
memory size, SSD cache may not be able to function on the server with the
smaller memory.
Cause
The memory size on the active server is smaller than the one on the passive
server.
Resolution
1. Sign in to your high-availability cluster and go to
Synology High
Availability
>
Cluster
.
2. Click on the power button and select
Shut down cluster
.
3. Refer to the information in your device’s
Hardware Installation Guide
to install memory modules on both servers.
4. Power on each device in the cluster by pressing their individual power
buttons.
For more information, refer to
Chapter 5.5: Memory expansion
in the
Synology High Availability (SHA) User Guide
.