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RAID Levels 43
RAID 0
RAID 0 provides disk striping across all drives in the RAID subsystem. RAID
0 does not provide any data redundancy, but does offer the best
performance of any RAID level. RAID 0 breaks up data into smaller blocks
and then writes a block to each drive in the array. The size of each block is
determined by the stripe size parameter, set during the creation of the RAID
set. RAID 0 offers high bandwidth.
By breaking up a large file into smaller blocks, PERC 3 can use several drives
to read or write the file faster. RAID 0 involves no parity calculations to
complicate the write operation. This makes RAID 0 ideal for applications
that require high bandwidth but do not require fault tolerance. RAID 0 is
also used to denote an “independent” or single drive.
Table 3-2 provides an overview of RAID 0.
Table 3-2. RAID 0 Overview
Uses
RAID 0 provides high data throughput, especially for
large files. Any environment that does not require
fault tolerance.
Strong Points
Provides increased data throughput for large files. No
capacity loss penalty for parity.
Weak Points
Does not provide fault tolerance. All data lost if any
drive fails.
Drives
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