Avago Technologies MegaRAID SAS 8204ELP - Manual (Page 18)

1-2 Overview
Copyright © 2005-2007 by LSI Logic Corporation. All rights reserved.
Note: LSI Logic recommends that you carefully assess any
decision to mix SAS and SATA drives within the same
virtual disks. Though you can do this, LSI strongly
discourages the practice.
The RAID controllers are based on the LSI Logic first-to-market SAS IC
technology and proven MegaRAID technology. As the second-generation
PCI Express RAID controller, the MegaRAID SAS controllers address the
growing demand for increased data throughput and scalability
requirements across midrange and enterprise-class server platforms. LSI
Logic offers a family of MegaRAID SAS controllers addressing the needs
for both internal and external solutions.
The innovative LSI Logic intelligent Battery Backup Unit 1 (LSIiBBU01)
and LSI Logic intelligent Transportable Battery Backup Unit 2
(LSIiTBBU02) for cached data protection allow system builders to protect
cached data even during the most catastrophic system failures. Refer to
the MegaRAID Battery Backup Unit User’s Guide or the MegaRAID
iTBBU02 Transportable Battery Backup Unit Quick Installation Guide on
the MegaRAID Universal Software Suite CD for more information about
these batteries.
The SAS controllers support the ANSI Serial Attached SCSI standard,
version 1.1. In addition, the controller supports the SATA II protocol
defined by the Serial ATA specification, version 1.0a. Supporting both the
SAS and SATA II interfaces, the SAS controller is a versatile controller
that provides the backbone of both server and high-end workstation
environments.
Each port on the SAS RAID controller supports SAS devices, SATA II
devices, or both using the following protocols:
•
SAS Serial SCSI Protocol (SSP), which enables communication with
other SAS devices
•
SATA II, which enables communication with other SATA II devices
•
Serial Management Protocol (SMP), which communicates
topology management information directly with an attached SAS
expander device
•
Serial Tunneling Protocol (STP), which enables communication with
a SATA II device through an attached expander