w w w . d e l l . c o m s u p p o r t . d e l l . c o m

F i g u r e 3 - 2 . R A I D 1 A r r a y

Segment 1

Segment 1 Duplicated

Segment 2

Segment 2

Duplicated

Segment 3

Segment 3

Duplicated

Segment 4

Segment 4 Duplicated

RAID 5

RAID 5 includes disk striping at the block level and parity. In RAID 5, the parity information is written to several drives. RAID 5 is best suited for networks that perform a lot of small input/output (I/O) transactions simultaneously.

RAID 5 addresses the bottleneck issue for random I/O operations. Because each drive contains both data and parity numerous writes can take place concurrently. In addition, robust caching algorithms and hardware based exclusive-or assist make RAID 5 performance exceptional in many different environments.

Table 3-4 provides an overview of RAID 5.

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RAID Levels

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Dell manual G u r e 3 2 . R a I D 1 a r r a y