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RAID 50
RAID 50 provides the features of both RAID 0 and RAID 5. RAID 50 includes both
parity and disk striping across multiple drives. RAID 50 is best implemented on two
RAID 5 disk arrays with data striped across both disk arrays. RAID 50 breaks up data
into smaller blocks, and then stripes the blocks of data to each RAID 5 raid 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 50 can sustain one to four drive failures while maintaining data integrity if each
failed disk is in a different RAID 5 array.
Point
Description
uses
RAID 50 works best when used with data that requires high reliability, high request rates, and
high data transfer and medium to large capacity.
strong points
RAID 50 provides high data throughput, data redundancy, and very good performance.
weak points
Requires 2 to 4 times as many parity drives as RAID 5.
hard disk drives
Six to 32.
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StorTrends/ManageTrends (version 2.7) Web Interface User's Guide for the StorTrends 2200 Storage Appliance
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