Asus LSI SAS3442X-R - Manual (Page 37)

Integrated RAID for SAS User’s Guide 4-1
Version 1.1 Copyright © 2006, 2007 by LSI Logic Corporation. All rights reserved.
Chapter 4
Overview of
Integrated Striping
This chapter provides an overview of the LSI Integrated Striping (IS)
feature. It includes these sections:
•
Section 4.1, “Introduction,” page 4-1
•
Section 4.2, “IS Features,” page 4-2
•
Section 4.3, “IS Description,” page 4-2
•
Section 4.4, “Integrated Striping Firmware,” page 4-4
•
Section 4.5, “Fusion-MPT Support,” page 4-4
4.1 Introduction
The LSI Integrated Striping (IS) feature is useful for applications that
require the faster performance and increased storage capacity of
striping. The low-cost IS feature has many of the advantages of a more
expensive RAID striping solution. A single IS logical drive may be
configured as the boot disk or as a data disk.
The IS feature is implemented with controller firmware that supports the
Fusion-MPT Interface. IS provides better performance and more capacity
than individual disks, without burdening the host CPU. The firmware
splits host I/Os over multiple disks and presents the disks as a single
logical drive. In general, striping is transparent to the BIOS, the drivers,
and the operating system.
The SAS BIOS CU is used to configure IS volumes, which can consist
of two to ten disks.