Buffalo HD-WLSU2R1 User Manual page 7

Using the RAID Utility
Once launched, the RAID Utility will briefly scan for your DriveStation
Duo. This may take a few seconds.
The initial screen will show your current configuration. If your Duo is
new, it will probably be in RAID 1 mode.
To change the RAID mode, click [Config] and choose [Disk Config].
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