Buffalo TeraStation Setup Manual page 41

• Configuring a Hot Spare
If you have 3 drives in a RAID 5 array, or 2 drives in a RAID 1 array, then you can configure another drive as a hot spare. If
one of the drives in the array fails, the TeraStation will switch over to the hot spare immediately.
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Notes:
If a hot spare is configured, click [Set to normal disk] to change the hot spare to a normal disk.
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The confirm operation screen will appear. Enter the number shown in the [Confirmation Number] field within 60
seconds and click [Apply].
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Follow the instructions displayed on the screen.
You have now configured a hot spare.
Note:
All data in the hot spare drive will be deleted when it is configured as a hot spare and again when it changes over from
a spare to a drive in the array.
TeraStation Setup Manual
Click [System] - [Storage] - [RAID Array] in the Web Admin.
Click an array which is set either RAID5
or RAID1.
Click [Set to spare-disk].
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