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RAID Array Controller 2-13
Compaq Confidential – Need to Know Required
Writer: Bob Young Project: RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide Comments:
Part Number: EK-SMCPO-UG. C01 File Name: c-ch2 RAID Array Controller.doc Last Saved On: 12/4/00 1:51 PM
RAID 0
RAID 0 breaks up data into smaller chunks and writes each chunk to a
different drive in the array. The size of each chunk is determined by the
controller’s chunk size parameter, which you set in the course of creating a
RAID set.
The advantage of RAID 0 is its high bandwidth. By breaking up a large block
of data into smaller chunks, the controller can use multiple drive channels to
write the chunks to the disk drives. Furthermore, RAID 0 involves no parity
calculations to complicate the write operation. Likewise, a RAID 0 read
operation employs multiple drives to assemble a single, large data block. This
makes RAID 0 ideal for applications such as graphics, video, and imaging that
involve the writing and reading of large, sequential blocks.
CAUTION: The lack of parity means that a RAID 0-disk array offers absolutely
no redundancy and thus cannot recover from a drive failure.