Intel AFCSASRISER User Guide - Page 38

Power Save settings, Array Purpose, Table 12. Factors to Consider for Array Configuration

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Power Save settings The controller conserves energy by placing certain unused drives into powersave mode. The controller will automatically spin up drives from powersave mode whenever necessary. Drives that can be set to power save mode are: Unconfigured Drives, Hot Spare Drives, Configured Drives. The setting can be made in either RAID BIOS Console 2, or RAID Web Console 2. There is also a way to disable this setting from CmdTool2, by typing: CmdTool2 -LDSetPowerPolicy -None -Lall -a0 This command only has effect when one or more logical drives are created. The Power Save mode currently is only supported by Intel® Intelligent RAID products. Array Purpose Important factors to consider when creating RAID arrays include availability, performance, and capacity. Define the major purpose of the disk array by answering questions related to these factors, such as the following, which are followed by suggested RAID levels for each situation: • Will this disk array increase the system storage capacity for general-purpose file and print servers? Use RAID 5, 6, 10, 50, or 60. • Does this disk array support any software system that must be available 24 hours per day? Use RAID 1, IME, 5, 6, 10, 50, or 60. • Will the information stored in this disk array contain large audio or video files that must be available on demand? Use RAID 0. • Will this disk array contain data from an imaging system? Use RAID 0 or 10. Fill out Table 12 to help you plan the array configuration. Rank the requirements for your array, such as storage space and data redundancy, in order of importance, and then review the suggested RAID levels. Table 12. Factors to Consider for Array Configuration Requirement Suggested RAID Level(s) Storage space RAID 0, RAID 5 Data redundancy RAID 5, RAID 6, RAID 10, RAID 50, RAID 60 Physical disk performance and throughput RAID 0, RAID 10 Hot spares (extra physical disks required) RAID 1, RAID IME, RAID 5, RAID 6, RAID 10, RAID 50, RAID 60 26 Intel® RAID Software User's Guide

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26
Intel
®
RAID Software User’s Guide
Power Save settings
The controller conserves energy by placing certain unused drives into powersave mode. The
controller will automatically spin up drives from powersave mode whenever necessary. Drives
that can be set to power save mode are: Unconfigured Drives, Hot Spare Drives, Configured
Drives. The setting can be made in either RAID BIOS Console 2, or RAID Web Console 2.
There is also a way to disable this setting from CmdTool2, by typing:
CmdTool2 -LDSetPowerPolicy -None -Lall -a0
This command only has effect when one or more logical drives are created. The Power Save
mode currently is only supported by Intel
®
Intelligent RAID products.
Array Purpose
Important factors to consider when creating RAID arrays include availability, performance,
and capacity. Define the major purpose of the disk array by answering questions related to
these factors, such as the following, which are followed by suggested RAID levels for each
situation:
•
Will this disk array increase the system storage capacity for general-purpose file and
print servers? Use RAID 5, 6, 10, 50, or 60.
•
Does this disk array support any software system that must be available 24 hours per
day? Use RAID 1, IME, 5, 6, 10, 50, or 60.
•
Will the information stored in this disk array contain large audio or video files that must
be available on demand? Use RAID 0.
•
Will this disk array contain data from an imaging system? Use RAID 0 or 10.
Fill out
Table 12
to help you plan the array configuration. Rank the requirements for your
array, such as storage space and data redundancy, in order of importance, and then review the
suggested RAID levels.
Table 12. Factors to Consider for Array Configuration
Requirement
Suggested RAID Level(s)
Storage space
RAID 0, RAID 5
Data redundancy
RAID 5, RAID 6, RAID 10, RAID 50, RAID 60
Physical disk performance and
throughput
RAID 0, RAID 10
Hot spares (extra physical disks required)
RAID 1, RAID IME, RAID 5, RAID 6, RAID 10, RAID 50,
RAID 60