User`s manual

RAID 5 requires a minimum of 3 disks. RAID 5 can sustain one
failed disk.
RAID 6 Two independent parity computations must be used in order to
provide protection against double disk failure. Two different
algorithms are employed to achieve this purpose. RAID 6 requires
a minimum of 4 disks. RAID 6 can sustain two failed disks.
RAID 10 RAID 10 has high reliability and high performance. RAID 10 is
implemented as a striped array whose segments are RAID 1
arrays. It has the fault tolerance of RAID 1 and the performance of
RAID 0. RAID 10 requires 4 disks. RAID 10 can sustain two failed
disks.
If the administrator improperly removes a hard disk that should not be
removed when RAID status is degraded, all data will be lost.
WARNING
Edit RAID
On the RAID Information screen, press the Edit button to go to the RAID
Information screen.
Using Edit RAID, you can select RAID ID and the Spare Disk. .
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