HP 166207-B21 Compaq RAID Advanced Data Guarding: A Cost-effective, Fault-tole

HP 166207-B21 - Smart Array 5302/32 RAID Controller Manual

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T
ECHNOLOGY
B
RIEF
1
TC020604TB
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Compaq RAID Advanced Data Guarding:
A Cost-effective, Fault-tolerant Solution
June 2002
Compaq Computer
Corporation
Prepared by
ISS Technology
Communications
E
XECUTIVE
S
UMMARY
Although most customers are not experiencing sharp increases in business revenue,
almost all are experiencing an explosion in the volume of enterprise data they are
accruing. As customers evaluate storage solutions for this data, they are focusing on three
very important needs: fault tolerance, storage capacity efficiency (cost effectiveness), and
performance. Compaq RAID Advanced Data Guarding (ADG) is a cost-effective, fault
tolerant solution for storing large volumes of enterprise data. Its performance, like that of
other RAID levels, depends on the nature of the application. RAID ADG is supported on
the Compaq Smart Array 5300 Controller and the Smart Array Cluster Storage and
Modular SAN Array 1000 controllers.
C
ONTENTS
Executive Summary
..........
1
Introduction
.....................
3
RAID Levels:
Functions and
Limitations
.......................
3
RAID ADG Provides
Optimum Fault
Tolerance
.........................
5
Organizations implementing a large array should consider RAID ADG because it can
tolerate up to two simultaneous drive failures without downtime or data loss. It can safely
protect an array of up to 56 hard disk drives with greater fault tolerance than RAID 5 and
with a lower implementation cost than RAID 1.
RAID ADG is a
Cost-Effective
Solution
...........................
7
Performance
Considerations
.................
8
Choosing a RAID
level
.................................
8
Summary
..........................
9
Please direct comments regarding this communication to the ISSG Technology Communications Group at this Internet
address: