Synology DS920 Synology High Availability SHA User Guide for DSM 7.0 - Page 20

Set up storage for SHA, Navigate the SHA User Interface

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Chapter 3: Set Up and Configure an SHA Cluster Solve the split-brain error 1. Sign in to DSM (NAS-A) via the cluster IP address. 2. Services on both the servers and the IP addresses of the high-availability cluster will be unavailable until the split-brain error is resolved. 3. A new tab named Split-brain will appear on the left panel. On this tab, the differences between the files in the shared folders on the two servers and the time that the servers became the active servers will be shown. Select the shared folder to compare from the drop-down menu on the right. 4. File Station will be in read-only mode, so you will still be able to download or view the files. 5. On the Cluster tab, you can either shut down the cluster or resolve the split-brain error by clicking the Manage button. There are two possible options. Refer to the the Split-brain section of Chapter 4: Navigate the SHA User Interface for more details. 6. Select Keep data from only one of the servers and select NAS-B as the new active server. 7. Finish applying the settings. After a few minutes, you will be redirected to the Cluster page and the cluster status will show that the data is being synchronized. 8. You can go to File Station to check again if the data of Share1 contains the most recent data after the synchronization is complete. 3.4 Set up storage for SHA Before you start This user guide uses the following examples, which are based on SHA's minimum requirements: • HDD: 2 • Storage pool: RAID-1 • Storage space / file system: Btrfs 18

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18
Chapter 3: Set Up and Configure an SHA Cluster
Solve the split-brain error
1. Sign in to DSM (NAS-A) via the cluster IP address.
2. Services on both the servers and the IP addresses of the high-availability cluster will be
unavailable until the split-brain error is resolved.
3. A new tab named
Split-brain
will appear on the left panel. On this tab, the differences
between the files in the shared folders on the two servers and the time that the servers
became the active servers will be shown. Select the shared folder to compare from the
drop-down menu on the right.
4.
File Station
will be in
read-only
mode, so you will still be able to download or view the files.
5. On the
Cluster
tab, you can either shut down the cluster or resolve the split-brain error by
clicking the
Manage
button. There are two possible options. Refer to the the
Split-brain
section of
Chapter 4: Navigate the SHA User Interface
for more details.
6. Select
Keep data from only one of the servers
and select
NAS-B
as the
new active
server
.
7. Finish applying the settings. After a few minutes, you will be redirected to the
Cluster
page
and the cluster status will show that the data is being synchronized.
8. You can go to
File Station
to check again if the data of
Share1
contains the most recent
data after the synchronization is complete.
3.4 Set up storage for SHA
Before you start
This user guide uses the following examples, which are based on SHA’s minimum
requirements:
•
HDD
: 2
•
Storage pool
: RAID-1
•
Storage space / file system
: Btrfs