User manual

INTRODUCTION
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puting the exclusive-or of the contents corresponding strips of the
surviving member disk. RAID-3 is best for applications that require
very fast data- transfer rates or long data blocks.
1.5.5 RAID 5
RAID 5 is sometimes called striping with parity at byte level. In
RAID 5, the parity information is written to all of the drives in the
controllers rather than concentrated on a dedicated parity disk. If
one drive in the system fails, the parity information can be used to
reconstruct the data from that drive. All drives in the array system
can be used to seek operation at the same time, greatly increasing
the performance of the RAID system This relieves the write bottle-
neck that characterizes RAID 4, and is the primary reason that
RAID 5 is more often implemented in RAID arrays.
1.5.6 RAID 6
RAID 6 provides highest reliability, but not widely used. Similar to
RAID 5, but does two different parity computations or the same