LSI MegaRAID SCSI 320-2 RAID Controller Series 518 - Manual (Page 68)

5-12 Configuring Physical Drives, Arrays, and Logical Drives
Copyright © 2002 by LSI Logic Corporation. All rights reserved.
5.3.1.3 Maximizing Drive Performance
You can configure an array for optimal performance. But optimal drive
configuration for one type of application will probably not be optimal for
any other application.
Table 5.6 lists basic guidelines for the performance
characteristics for RAID drive arrays at each RAID level.
5.3.2 Assigning RAID Levels
Only one RAID level can be assigned to each logical drive. Table 5.7
shows the drives required per RAID level.
Table 5.6 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.
Table 5.7 Number of Physical Drives per RAID Level
RAID
Level Minimum # of Physical Drives Maximum # of Physical Drives
0 1 30
1 2 2
5 3 30
10 4 30
50 6 30