characteristics for RAID drive arrays at each RAID level is shown in

Table 5.6.

 

Table 5.6

Performance Characteristics for RAID Levels

 

 

RAID Level

Performance Characteristics

 

 

0

Excellent for all types of I/O activity, but provides no data

 

security.

 

 

1

Provides data redundancy and good performance.

 

 

5

Provides data redundancy and good performance in most

 

environments.

 

 

10

Provides data redundancy and excellent performance.

 

 

50

Provides data redundancy and very good performance.

 

 

5.3.2Assigning RAID Levels

Only one RAID level can be assigned to each logical drive. Table 5.7 shows the drives required per RAID level.

Table 5.7

Number of Physical Drives for RAID Levels

 

 

 

RAID

 

 

Level

Minimum # of Physical Drives

Maximum # of Physical Drives

 

 

 

0

1

15

 

 

 

1

2

2

 

 

 

5

3

15

 

 

 

10

4

14

 

 

 

50

6

15

 

 

 

Note: The Megaraid SCSI 320-1 controller supports a maximum of 15 physical drives.

Creating Logical Drives

5-11

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