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GLOSSARY
of data corruption is greatly reduced. The disadvantage is that write-
through operations are more time consuming.
XOR-Engine
All RAID arrays (with the exception of RAID 0, RAID 1 and RAID 1E)
require parity to be calculated and written to the array in conjunction
with data. Typically the parity is a simple XOR on the bytes compris-
ing a stripe. This is a computationally intensive operation that many
modern RAID controllers perform using a dedicated ASIC (instead of
calculating them in rmware on the main embedded processor’s core).
This dedicated ASIC is often referred to as a XOR-engine.