Avago Technologies LSI SAS 3041E-R - Manual (Page 42)

3-2 UNIX Operating System Device Drivers
Version 1.3 Copyright © 2001, 2002, 2007 by LSI Logic Corporation. All rights reserved.
high I/O throughput, making use of the Fusion-MPT architecture. This
driver takes advantage of new hardware features in the LSI Ultra320
SCSI, SAS, and LSI Fibre Channel chips to minimize CPU utilization,
including interrupt coalescing, which can result in less than one interrupt
per I/O.
The lsiutil utility, which is included with the itmpt driver, provides a
wealth of functionality for displaying and modifying settings for LSI MPT
adapters. You can execute
lsiutil with no arguments to start an
interactive session. You can also use the command lsiutil -h to view
information about the lsiutil command line options. This utility is
installed to /usr/bin/lsiutil .
In order to preserve a consistent mapping between Solaris target IDs and
fibre channel target devices, the driver maintains a configuration file with
entries that map each Solaris target ID to an FC target World Wide Name
(WWN). Entries are created for all FC target devices; this is in addition
to the Root Boot persistent target ID selection, which is configurable
through the BIOS. By default, the
itmpt driver does not maintain
persistent bindings between targets and WWNs. However, persistent
bindings are recommended for most RAID controllers such as Engenio
RAID controllers. The
lsiutil utility can be used to modify persistent
bindings, similar to the way this is done through the BIOS. Additional
entries can be made in the
/kernel/drv/itmpt.conf configuration file.
See the syntax and examples that are included in that file.
3.1.2 Driver Features and LSI Device Support
The Solaris x86 driver supports these features:
•
State-of-the-art Fusion-MPT interface, providing support for FC,
SCSI, SAS, and RAID devices with a single binary image
•
Highly efficient, low CPU usage architecture
•
Multiple host adapters
•
Multiple Logical Unit Numbers (LUNs)
•
Scatter-gather
•
Disk array configurations with no LUN 0
•
Disk array configurations with non-contiguous LUNs
•
Multiprocessor environments.