ABSTRACT
Fibre Channel, because of the calculations they must perform. For example, to perform a diskwrite operation to a RAID 5 array, a Read-Modify-Writeback operation must be performed. First, old data must be read from both a data drive and a parity drive. Second, that data must be XORed. Third, new data must be written to the data drive. Fourth, new data must also be XORed with the parity data, and only then can the result finally be written to the parity drive.
