HP 4400 Guia de Instalação descarregar pdf (Página 11)

RAID meth-

Data redund-

ancy

Best practicesSummary

Striping and

mirroring

High

In general, Vraid1 virtual disks

provide better performance char-

acteristics over a wider range of

application workloads than

Vraid5.

Vraid1 is optimized for data

redundancy and I/O speed,

but uses the most physical

disk space.

IMPORTANT: Vraid1 uses

about 100% more physical

disk space than Vraid0.

Vraid1

Striping and

parity

Medium

Vraid5 virtual disks provide as

good or better performance than

Vraid1 for applications that use

sequential writes. Vraid5 has

much lower random write perform-

ance in comparison to Vraid1,

but has much higher capacity ef-

ficiency.

Vraid5 provides a balance

of data redundancy, I/O

speed, and efficient use of

physical disk space. Vraid5

uses about 20% more phys-

ical disk space than Vraid0.

Vraid5

Striping and

double par-

ity

Very high

Performance characteristics of

Vraid6 for random and sequential

write workloads will be slightly

slower than Vraid5. Vraid6

provides the highest level of re-

dundancy protection of all the

Vraid types.

Vraid6 is similar to Vraid5,

but provides a higher level

of redundancy by storing

two parity blocks per stripe

instead of one. Vraid6 uses

33% more physical disk

space than Vraid0.

Vraid6

NOTE:

For best practice information, see the

HP StorageWorks 4400 Enterprise Virtual Array configuration

best practices white paper

available at:

http://h18006.www1.hp.com/storage/arraywhitepapers.html?jumpid=reg_R1002_USEN

HP Command View EVA implementation

HP Command View EVA can be implemented in two ways:

• Server-based management—HP Command View EVA is installed on a management server con-

nected to the EVA, providing management of multiple HP EVA storage systems. All components

of the software suite (HP Command View EVA, HP Command View EVAPerf, HP Storage System

Scripting Utility, SMI-S EVA) are installed. Server-based management is applicable to all EVA

models.

• Array-based management—Beginning with HP Command View EVA 8.1, the EVA4400 is shipped

with HP Command View EVA pre-installed on the management module within the controller en-

closure. Only one component of the software suite (HP Command View EVA) is installed. Array-

based management is applicable to the EVA4400 only.

HP StorageWorks 4400 Enterprise Virtual Array Installation Guide 11

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