Integrated RAID for SAS User’s Guide
2-1
Version 1.1
Copyright © 2006, 2007 by LSI Logic Corporation. All rights reserved.
Chapter 2
Overview of Integrated Mirroring
and Integrated Mirroring
Enhanced
This chapter provides an overview of the LSI Integrated Mirroring (IM)
and Integrated Mirroring Enhanced (IME) features. It includes these
sections:
•
Section 2.1, “Introduction,” page 2-1
•
Section 2.2, “IM and IME Features,” page 2-2
•
Section 2.3, “IM/IME Description,” page 2-3
•
Section 2.4, “Integrated RAID Firmware,” page 2-5
•
Section 2.5, “Fusion-MPT Support,” page 2-7
2.1
Introduction
As a result of the shift towards Network Attached Storage (NAS), ISPs
need a cost effective, fault-tolerant solution to protect the operating
systems on small form factor, high-density, rack-mountable servers. The
LSI Integrated Mirroring (IM) and Integrated Mirroring Enhanced (IME)
features provide data protection for the system boot volume to safeguard
critical information such as the operating system on servers and high
performance workstations. The IM and IME features provide a robust,
high-performance, fault-tolerant solution to data storage needs, at a
lower cost than a dedicated RAID controller.
The IM and IME features support one or two mirrored volumes per LSI
SAS controller, to provide fault-tolerant protection for critical data. The
two volumes can have up to twelve disk drives total, plus one or two hot
spare disks.
If a disk in an Integrated Mirroring volume fails, the hot swap capability
allows you to restore the volume by simply swapping disks. The firmware
then automatically re-mirrors the swapped disk. Additionally, each SAS
Summary of Contents for Integrated RAID for SAS
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