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Chapter 5 Backup
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If the administrator password is correct, the backup TeraStation will beep. Press and hold the function button
on the backup TeraStation to accept the settings from the main TeraStation. When you press the function
button, the backup TeraStation will stop beeping.
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The I51 message will appear on the LCD panel and NAS Navigator2 for both TeraStations. Wait until
initialization finishes. Failover is configured after it finishes and the I51 message disappears.
When failover is configured, the RAID array on the backup TeraStation may be reconfigured and
resynchronized to the same mode with the main TeraStation as part of the failover configuration process. This
is expected behavior and not an error.
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To avoid a possible IP conflict after failover occurs, configuring a service IP address from the main TeraStation's
Settings is recommended.
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.
• If you change the email notification settings on the backup TeraStation during maintenance mode, the settings
will be ignored when failover occurs and the backup TeraStation starts working as a new main TeraStation.
• Ethernet frame size settings for main and backup TeraStations should be 1500 bytes. To change the Ethernet
frame size, navigate to Network > IP Address, click the LAN port, and change the Ethernet frame 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 > Failover > Edit Failover Status and click Resync.
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 both 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.
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