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RAID Levels 47
Table 3-4. RAID 5 Overview
Uses
RAID 5 provides high data throughput, especially for
large files. Use RAID 5 for transaction processing
applications because each drive can read and write
independently. If a drive fails, PERC 3 uses the parity
drive to recreate all missing information. Use also for
office automation and online customer service that
requires fault tolerance. Use for any application that
has high read request rates but low write request rates.
Strong Points
Provides data redundancy and good performance in
most environments
Weak Points
Disk drive performance will be reduced if a drive is
being rebuilt. Environments with few processes do not
perform as well because the RAID overhead is not
offset by the performance gains in handling
simultaneous processes.
Drives
3 to 32