Usage Restrictions - Buffalo TeraStation 5010 User Manual

If the backup TeraStation has not received a packet from the main TeraStation within a specified time, the backup
TeraStation considers the main TeraStation to have failed. By default, it will try 5 times and wait 60 seconds. If this
is triggered by accident, reconfigure failover from the main TeraStation.
• Errors
Failover will occur if any of the following errors occur:
E12 (cooling failure), E14 (cannot mount RAID array), E16 (drive not found), E22 (cannot mount drive), E30 (drive
failure)
Notes:
• Only use identical model and capacity TeraStations for failover. If the capacity of the main TeraStation is larger
than that of the backup TeraStation, an I33 replication error will occur.
• All drive bays of a TeraStation should be occupied if it will be used for failover. Failover will not work if a drive
is missing from any bay.

Usage Restrictions

Functional Restrictions
Failover is not available when any of the following functions are enabled:
Replication, sleep mode, encrypted drive volume, LVM volume, iSCSI volume, port trunking, cloud storage, Dropbox
Sync, hot spare, access restrictions by Active Directory domain
Setting Restrictions
The following functions will not be available while failover is enabled:
Initializing settings, changing the RAID settings, formatting drives, iSCSI volume, changing the backup unit's
settings, turning the TeraStation on and off, updating the firmware.
While failover is enabled, shutdown, power-on, and firmware update operations can be made available by
temporarily changing the TeraStation to maintenance mode. Maintenance mode can be enabled or disabled at
Backup - Failover in the main TeraStation's Settings. Click Maintenance mode to enable maintenance mode, or click
Cancel maintenance mode to disable maintenance mode.
To update the firmware while in maintenance mode, the main TeraStation can be updated from Settings, but the
backup TeraStation cannot. Download the firmware updater from the Buffalo website for the backup TeraStation
and try updating the firmware through it.
Non-Transferable Settings
The settings below are not copied from the main TeraStation to the backup TeraStation. Make a note of the original
settings so that they can be configured manually if failover errors.
WebAccess , UPS synchronization, SNMP (when using SNMPv3), the backup job settings either if specifying shared
*
folders on the backup TeraStation or USB drives as the backup destination, and USB drives' shared folder settings
* After failover, re-register your BuffaloNAS.com account for WebAccess on the new main TeraStation if LAN port 1 is
assigned a new static IP address or using DHCP. If the new main TeraStation inherits the original static IP address for
LAN port 1, WebAccess settings will be transferred and you will not need to reconfigure it.
Using with UPS
Once failover is configured, you cannot set up a UPS for the backup TeraStation. Configure your UPS before
configuring failover. UPS recovery can be configured for both the main and backup TeraStations. However, the UPS
settings of the main TeraStation will not be copied to the backup TeraStation.
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