Promise Technology UltraTrak100 TX8 - Manual (Page 51)

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RAID 5 – B
LOCK AND
P
ARITY
S
TRIPING
RAID 5 is similar to RAID 3 as described above except that the parity data is
rotated across the physical drives along with the block data. Having the parity data
striped across all the physical drives in this manner removes the random write
performance bottleneck of RAID 3. The total capacity of a RAID 5 array is
calculated the same as a RAID 3 array.
Figure A5. RAID 5 stripes all drives with data and parity information