Dell PowerEdge Expandable RAID Controller 3 User's Manual
Download Operation & user’s manual of Dell DC, 3 Computer Hardware for Free or View it Online on All-Guides.com. This version of Dell DC, 3 Manual compatible with such list of devices, as: DC, 3, DCL and 3, PowerEdge Expandable RAID Controller 3, QC, 3, SC PERC 3
Brand: Dell
Category: Computer Hardware
Type: Operation & user’s manual
Model: Dell DC, 3 , Dell DCL and 3 , Dell PowerEdge Expandable RAID Controller 3 , Dell QC, 3 , Dell SC PERC 3
Pages: 254 (1.33 Mb)
Configuring PERC 3 95
Maximizing Drive Performance
You can configure an array for optimal performance; however, optimal drive
configuration for one type of application will probably not be optimal for
any other application. A basic guideline of the performance characteristics
for RAID drive arrays at each RAID level is shown in Table 7-9.
Assigning RAID Levels
Only one RAID level can be assigned to each logical drive. The drives
required per RAID level shown in Table 7-10.
5 100% protection through striping and parity. The data is striped and
parity data is written across a number of physical disk drives.
Table 7-9. Performance Characteristics for Each RAID
Level
RAID
Level
Performance Characteristics
0 Excellent for all types of input/output (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 high data transfers and complete data redundancy.
50 Provides high data transfers and data redundancy.
Table 7-10. Physical Drives Required for Each RAID Level
RAID
Level
Minimum Number of
Physical Drives
Maximum Number of Physical
Drives
01 32
12 2
Table 7-8. Fault Tolerance Features for RAID Levels 0, 1
and 5
(continued)
RAID
Level
Fault Tolerance Protection