RA ID. Shuttle SN27P2, SN27P2 V2

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RA ID. Shuttle SN27P2, SN27P2 V2 | Manualzz

RAID 5

L

How RAID 5 Works

RAID 5 stripes both data and parity information across three or more drives. It writes data and parity blocks across all the drives in the array. Fault tolerance is maintained by ensuring that the parity information for any given block of data is placed on a different drive from those used to store the data itself.

DATA1

DATA3

PARITY

DATA7

DATA 8

DATA7

DATA7

DATA1

DATA3

PARITY

DATA7

DATA 8

DATA7

DATA7

Figure 1.4 RAID Array Diagram

DATA1

DATA3

PARITY

DATA7

DATA 8

DATA7

DATA7

Summary of Features and Benefits

Benefits

Drawbacks

Uses

An ideal combination of good performance, good fault tolerance, and high capacity and storage effciency.

Individual bolck data transfer rate same as a single disk. Wtire performance can be CPU intensive.

RAID 5 is recommended for transaction processing and general purpose service.

Drives Minimum, 3

Fault Tolerance Yes.

7

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