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Notes:
• If you want to cancel the failover settings while both the main and backup TeraStations are working properly,
click Force Failover to Stop on both TeraStations and restart them. After the TeraStations are restarted, make sure
that all settings such as IP address and files on the shared folders are correct.
When you cancel failover settings, attributes of the shared folders on the backup TeraStation will become read-
only. Change the attribute settings to the desired options if necessary.
• If replication is configured for more than one folder, initialize the TeraStation before configuring failover.
• The main TeraStation cannot be used as the backup location for Time Machine.
• Do not use the same TeraStation for both failover and replication, or failover and Time Machine.
• If email notification is enabled and failover occurs, navigate to Management > Email Notification > Edit in the main
TeraStation's Settings and click OK.
• MTU size settings for main and backup TeraStations should be 1500 bytes. To change the MTU size, navigate to
Network > IP Address > Edit, and change the MTU size to "1500" bytes.
• Files whose filenames contain more than 80 alphanumeric characters will not be backed up.
• If the I33 message appears on the LCD panel, navigate to Backup > Replication and click Resync.
• The RAID array on the backup TeraStation may be reconfigured and resynchronized as part of the failover
configuration process. This is expected behavior and not an error.
Replacing to the Backup TeraStation Manually
If "Switch to backup unit manually" is selected on the Advanced Settings tab in the main TeraStation's Settings, the
backup TeraStation will not replace the main TeraStation if the main TeraStation fails. To have the backup TeraStation
replace the main TeraStation, you can either:
• Log in to Settings for the backup TeraStation and click Set as Main Unit.
• Or, press and hold the function button on the backup TeraStation.
Note: If the main TeraStation fails but all LAN ports' link on the backup TeraStation is up, the backup TeraStation
cannot replace to the main TeraStation from Settings. In such a case, use the function button instead.
Reconfiguring After Failover Occurs
When the backup TeraStation replaces the main TeraStation, the I49 message may appear on the backup
TeraStation's LCD panel and NAS Navigator2. To configure failover again, follow the procedure below using the new
TeraStation unit. The following procedure is an example using the replaced backup TeraStation ("main TeraStation")
and the new TeraStation ("backup TeraStation").
If you don't want to configure failover with the new TeraStation, cancel the failover settings by following the steps
1–5 below and restart both TeraStations. The I49 message will disappear.
Note: The following procedure will also work if failover occurs unexpectedly.
1
After failover occurs, log in to Settings for the main TeraStation.
If you have configured to sync with the UPS device connected to the failed TeraStation, the E10 message will
be displayed on the main TeraStation. In such a case, follow the procedure below to change the UPS settings
on the main TeraStation. If you didn't, skip to the next step.
a. Disconnect the UPS cable from the failed TeraStation and connect it to the main TeraStation.
b. Click Management.
c. Click
to the right of "Power Management".
d. Click Edit.
e. Select "Sync with UPS connected to this TeraStation" and reconfigure the desired UPS settings.
f. Click OK when finished.
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