F-2 Sun Fire X4100/X4100 M2 and X4200/X4200 M2 Servers Service Manual • August 2009
The SAS BIOS is the bootable ROM code that manages SAS hardware resources. It is
specific to a family of LSI Logic Fusion-MPT SAS controllers or processors. The
Fusion-MPT SAS BIOS integrates with a standard system BIOS, extending the
standard disk service routine provided through INT13h.
During the boot time initialization, the SAS BIOS determines whether the system
BIOS has already installed other hard disks, such as an IDE drive. If such drives are
already installed, the SAS BIOS maps any SAS drives it finds behind these drives.
Otherwise, the SAS BIOS installs drives starting with the system boot drive. In this
case, the system boots from a drive controlled by the SAS BIOS. The LSI Logic SAS
BIOS supports the BIOS Boot Specification (BBS).
F.1.1 Boot Initialization With BIOS Boot Specification
(BBS)
The Fusion-MPT SAS BIOS supports the BIOS Boot Specification (BBS), which allows
you to choose which device to boot from by selecting the priority.
To use this feature, the system BIOS must also be compatible with the BBS. If the
system supports the BBS, you can use the system BIOS Setup menu to select the boot
order and drive order. In the system BIOS Setup, the Boot Connection Devices menu
lists the available boot options. Use that menu to select the device and rearrange the
order. Then exit to continue the boot process.
F.2 Starting the SAS BIOS Configuration
Utility
If you have SAS BIOS version 6.xx, and it includes the Fusion-MPT SAS BIOS
Configuration Utility, you can change the default configuration of the SAS host
adapters. You may decide to change these default values if there is a conflict between
device settings or if you need to optimize system performance.
The version number of the SAS BIOS appears in a banner displayed on the computer
monitor during bootup. If the utility is available, this message also appears during
bootup:
Press Ctrl+C to start LSI Logic Configuration Utility...
This message remains on the screen for about five seconds, giving you time to start
the utility. If you press Ctrl+C, the message changes to:
Please wait, invoking LSI Logic Configuration Utility...
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