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Chapter 3 RAID Levels
19
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, MegaRAID Express 500 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.
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
One to 15
The initiator takes one ID per channel. This leaves 15 IDs
available for one channel.