Buffalo TeraStation 5010 TS51210RH, User Manual, Page: 101 / 211

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Select the LAN port to be used for sharing files and enter a virtual IP address and subnet mask.
About Virtual IP Address:
A virtual IP address is an IP address that will be used for file sharing while failover is configured. By assigning
a different IP address from the one to be assigned to the LAN port, you can access the TeraStation for sharing
files, as well as open Settings using the virtual IP address. This IP address will be inherited to the backup
TeraStation when failover occurs, so you can access the backup TeraStation even if you don't know the backup
TeraStation's static IP address.
Configure an unused IP address for the virtual IP; make sure it uses the same segment as the main and backup
TeraStations.
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Select the LAN port to be used for transferring data via failover.
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Configure whether or not to inherit subfolders' access restrictions to the backup TeraStation, then click
Continue .
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If the administrator username and password is correct, the backup TeraStation will beep. Press and hold the
function button to accept the settings from the main TeraStation. When you press the function button, the
backup TeraStation will stop beeping.
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Hold it down until the backup TeraStation beeps again.
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The I51 message will display 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.
Notes:
• 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 error 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 in the Advanced Settings tab on 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 down 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 display and in NAS Navigator2.
To configure failover again, follow the procedure below with the new TeraStation unit. The following procedure is an
example using the replaced backup TeraStation ("main TeraStation") and the new TeraStation ("backup TeraStation").
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