Installation guide

Software Operation Manual
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1.2.4 RAID 3
RAID 3 provides disk striping and complete data redundancy though a
dedicated parity drive. RAID 3 breaks up data into smaller blocks, calculates
parity by performing an exclusive-or on the blocks, and then writes the blocks to
all but one drive in the array. The parity data created during the exclusive-or is
then written to the last drive in the array. If a single drive fails, data is still
available by computing 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.