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15 Intel® RAID Software User Guide
Table 6. RAID 10 Overview
Figure 6. RAID 10 – Combi
nation of RAID 1 and RAID 0
2.2.7 RAID 50 - Combination of RAID 5 and RAID 0
RAID 50 provides the features of both RAID 0 and RAID 5. RAID 50 includes both
parity and disk striping across multiple arrays. RAID 50 is best implemented on two
RAID 5 disk arrays with data striped across both disk groups.
RAID 50 breaks up data into smaller blocks and then stripes the blocks of data to each
RAID 5 disk set. RAID 5 breaks up data into smaller blocks, calculates parity by
performing an exclusive-or on the blocks and then writes the blocks of data and parity to
each drive in the array. The size of each block is determined by the stripe size parameter,
which is set during the creation of the RAID set.
RAID level 50 supports up to eight spans and tolerates up to eight drive failures, though
less than total disk drive capacity is available. Though multiple drive failures can be
tolerated, only one drive failure can be tolerated in each RAID 1 level array.
Table 7 provides an overview of RAID 50.
Uses
Appropriate when used with data storage that requires 100 percent
redundancy of mirrored arrays and that needs the enhanced I/O
performance of RAID 0 (striped arrays). RAID 10 works well for
medium-sized databases or any environment that requires a higher
degree of fault tolerance and moderate to medium capacity.
Strong Points
Provides both high data transfer rates and complete data redundancy.
Weak Points
Requires twice as many drives as all other RAID levels except RAID 1.
Drives
4 - 240