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3. Creating Integrated Mirroring Volumes
This section describes how to create Integrated Mirroring (IM) and Integrated Mirror-
ing Enhanced (IME) volumes using the LSI Logic SAS BIOS Configuration Utility (SAS
BIOS CU).
3.1 IM Configuration Overview
You can use the SAS BIOS CU to create one or two IM or IME volumes on each LSI
Logic SAS controller, with an optional global hot spare disk. All disks in an IM or IME
volume must be connected to the same LSI Logic SAS controller.
Although you can use disks of different size in IM and IME volumes, the smallest disk
determines the "logical" size of each disk in the volume. In other words, the excess
space of the larger member disk is not used.
Refer to Section 2.2, "IM Features," for more information about Integrated Mirroring
volumes.
3.2 Creating IM and IME Volumes
The SAS BIOS CU is part of the Fusion-MPT BIOS. When the BIOS loads during boot
and you see the m essage about the LS I Logic C onfiguration U tility, press
start the CU. After you do this, the message changes to:
Please wait, invoking SAS Configuration Utility...
After a brief pause, the main menu of the SAS BIOS CU appears. On some systems,
however, the following message appears next:
LSI Logic Configuration Utility will load following initialization!
In this case, the SAS BIOS CU will load after the system has completed its power-on
self test.
You can configure one or two IM or IME volumes per Fusion-MPT controller. You can
also combine IM, IME, and Integrated Striping volumes on the same controller, up to a
maximum of 10 physical disk drives.
The following guidelines also apply when creating an IM or IME volume:
All physical disks in the volumes must be either SATA (with extended command
set support) or SAS (with SMART support). SAS and SATA disks cannot be
combined in the same volume.
Disks must have 512-byte blocks and must not have removable media.
An IM volume must have two drives, plus an optional global hot spare. An IME
volume. An IME volume can have three to eight drives, or three to seven drives
if you also create a global hot spare.
v
Note: If a disk in an IM or IME volume fails, it is rebuilt on the global hot spare if one
LSI SAS RAID
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