HP Xw8200 LSI SCSI: Integrated RAID User's Guide (PCI plug-in and system board - Page 15

Integrated Mirroring IM, Overview

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Chapter 2 Integrated Mirroring (IM) Overview This chapter provides an overview of the LSI Logic Integrated Mirroring (IM) feature and includes these sections: • Section 2.1, "Introduction," page 2-1 • Section 2.2, "Features," page 2-2 • Section 2.3, "Description," page 2-3 • Section 2.4, "Integrated Mirroring Firmware," page 2-5 • Section 2.5, "Fusion-MPT Support," page 2-8 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 Logic Integrated Mirroring (IM) feature provides data protection for the system boot volume to safeguard critical information such as the operating system on servers and high performance workstations. This new Integrated Mirroring feature gives customers a robust, highperformance, fault-tolerant solution that is less expensive than a dedicated RAID controller. The IM feature provides simultaneous mirroring on configurations of two to six disk disks, to assure fault tolerant, high availability data. If a disk fails, the hot swap capability allows the system to be easily restored by simply swapping disks. The system then automatically re-mirrors the swapped disk. Additionally, the hot spare feature keeps one disk ready to automatically replace a failed disk in the volume, making the system even more fault-tolerant. Integrated RAID User's Guide 2-1 Version 1.0 Copyright © 2003 by LSI Logic Corporation. All rights reserved.

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Integrated RAID User’s Guide
2-1
Version 1.0
Copyright © 2003 by LSI Logic Corporation. All rights reserved.
Chapter 2
Integrated Mirroring (IM)
Overview
This chapter provides an overview of the LSI Logic Integrated Mirroring
(IM) feature and includes these sections:
•
Section 2.1, “Introduction,” page 2-1
•
Section 2.2, “Features,” page 2-2
•
Section 2.3, “Description,” page 2-3
•
Section 2.4, “Integrated Mirroring Firmware,” page 2-5
•
Section 2.5, “Fusion-MPT Support,” page 2-8
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 Logic Integrated Mirroring (IM) feature provides data protection for
the system boot volume to safeguard critical information such as the
operating system on servers and high performance workstations. This
new Integrated Mirroring feature gives customers a robust, high-
performance, fault-tolerant solution that is less expensive than a
dedicated RAID controller.
The IM feature provides simultaneous mirroring on configurations of two
to six disk disks, to assure fault tolerant, high availability data. If a disk
fails, the hot swap capability allows the system to be easily restored by
simply swapping disks. The system then automatically re-mirrors the
swapped disk. Additionally, the hot spare feature keeps one disk ready
to automatically replace a failed disk in the volume, making the system
even more fault-tolerant.