Buffalo TeraStation 3010 User Manual page 56

Chapter 4 Storage Management
1
From Settings, click Storage.
2
Click the settings icon (
3
Choose a RAID array.
4
Set the RAID mode to "RAID 1".
5
Select the "Add a drive to a RAID array with RMM. Your data will be preserved. " checkbox.
) to the right of "RAID".
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