• Reduced performance during rebuilds.

98

Appendix B: SATA RAID configuration

Assigning RAID levels

Only one RAID level can be assigned to each array. The table below displays the drives required per RAID level.

RAID Level

Minimum number of

Maximum number of

physical drives

physical drives

 

 

 

 

0

One

Four

 

 

 

1

Two

Two

 

 

 

10

Four

Four

 

 

 

The factors you need to consider when selecting a RAID level are listed in the table below:

Level

Description

Pros

Cons

No. of

Fault

 

and use

 

 

Drives

Tolerant

 

 

 

 

 

 

0

Data divided

High data

 

in blocks and

throughput

 

distributed

for large

 

sequentially

files

(pure striping).

Note: Use for non-critical data that requires high performance.

• No fault

One to No

tolerance.

four

Data is lost if a drive fails.

1

Data

100 percent

More disk

Two

Yes

 

duplicated on

data

 

space

 

 

 

another disk

redundancy,

 

required.

 

 

 

(mirroring).

providing

Reduces

 

 

 

Note: Use for

fault

 

usable disk

 

 

 

read-intensive,

tolerance.

 

space to the

 

 

 

fault-tolerant

 

 

size of the

 

 

 

systems.

 

 

smallest

 

 

 

 

 

 

drive.

 

 

 

 

 

 

 

 

 

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Acer G320 Series manual Assigning RAID levels, RAID Level Minimum number Maximum number Physical drives

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