Asus LSI SAS3442X-R - Manual (Page 25)

Integrated RAID for SAS User’s Guide 3-1
Version 1.1 Copyright © 2006, 2007 by LSI Logic Corporation. All rights reserved.
Chapter 3
Creating IM and IME
Volumes
This chapter explains how to create Integrated Mirroring (IM) and
Integrated Mirroring Enhanced (IME) volumes using the LSI SAS BIOS
Configuration Utility (SAS BIOS CU). The chapter includes these topics:
•
Section 3.1, “IM/IME Configuration Overview,” page 3-1
•
Section 3.2, “Creating IM and IME Volumes,” page 3-2
•
Section 3.3, “Creating a Second IM or IME Volume,” page 3-5
•
Section 3.4, “Managing Hot Spares,” page 3-6
•
Section 3.5, “Other Configuration Tasks,” page 3-8
3.1 IM/IME Configuration Overview
You can use the SAS BIOS CU to create one or two IM/IME volumes on
each LSI SAS controller, with one or two optional global hot spare disks.
All disks in an IM/IME volume must be connected to the same LSI SAS
controller.
Although you can use disks of different size in IM and IME volumes, the
smallest disk in the volume will determine the logical size of all disks in
the volume. In other words, the excess space of the larger member
disk(s) will not be used. For example, if you create an IME volume with
two 100-GB disks and two 120-GB disks, only 100-GB of the larger disks
will be used for the volume.
Refer to Section 2.2, “IM and IME Features,” for more information about
Integrated Mirroring volumes.