Intel® RAID Software User’s Guide iii
Table of Contents
Chapter 1: Overview .................................................................................................. 1
Supported Hardware ..............................................................................................................1
Software .................................................................................................................................3
RAID Terminology .................................................................................................................4
Fault Tolerance ..............................................................................................................4
Enclosure Management .................................................................................................6
Performance ..................................................................................................................6
Chapter 2: RAID Levels .............................................................................................. 9
Summary of RAID Levels ......................................................................................................9
Selecting a RAID Level ........................................................................................................10
RAID 0 - Data Striping .................................................................................................10
RAID 1 - Disk Mirroring/Disk Duplexing .......................................................................11
RAID 5 - Data Striping with Striped Parity ...................................................................11
RAID 6 - Distributed Parity and Disk Striping ..............................................................12
RAID IME .....................................................................................................................13
RAID 10 - Combination of RAID 1 and RAID 0 ...........................................................14
RAID 50 - Combination of RAID 5 and RAID 0 ...........................................................15
RAID 60 - Combination of RAID 0 and RAID 6 ...........................................................16
RAID Configuration Strategies .............................................................................................19
Maximizing Fault Tolerance .........................................................................................19
Maximizing Performance .............................................................................................20
Maximizing Storage Capacity ......................................................................................21
RAID Availability ..................................................................................................................23
RAID Availability Concept ............................................................................................23
Spare Drives ................................................................................................................23
Rebuilding ....................................................................................................................23
Drive in Foreign State ..................................................................................................23
Copyback .....................................................................................................................24
Configuration Planning ................................................................................................24
Dimmer Switch Feature ...............................................................................................25
Number of Physical Disks ............................................................................................25
MegaRAID Fast Path ...................................................................................................25
4K Sector Drive Support ..............................................................................................25
Larger than 2TB Drive Support ....................................................................................26
Power Save settings ....................................................................................................26
Shield State .................................................................................................................26
Array Purpose ..............................................................................................................27
Chapter 3: RAID Utilities .......................................................................................... 29
Intel
®
Embedded Server RAID Technology 2 BIOS Configuration Utility ............................29
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