Avago Technologies MegaRAID SAS 8204ELP - Manual (Page 20)

1-4 Overview
Copyright © 2005-2007 by LSI Logic Corporation. All rights reserved.
•
The MegaRAID SAS 84016E PCI Express Disk Array RAID
Controller has one Intel IOP333 I/O processor and two LSI
SAS1068s that control 16 internal SAS/SATA ports through four SAS
4x internal connectors.
1.3 General Description
The RAID controllers bring 3.0 Gbit/s Serial Attached SCSI and 3.0
Gbit/s SATA II performance to host adapter, workstation, and server
designs. The controllers support internal and external storage devices,
which allow you to use a system that supports enterprise-class SAS and
desktop-class SATA II drives. Each RAID controller can connect to drives
directly and can use expanders to connect to additional drives. Simplified
cabling between devices is an additional benefit.
The SAS controllers integrate eight high-performance SAS/SATA II PHYs
and a PCI Express bus master DMA core. Each of the eight PHYs is
capable of 3.0 Gbit/s SAS link rates and 3.0 Gbit/s SATA II link rates.
The SAS RAID controllers support the SAS protocol as described in the
Serial Attached SCSI Standard, version 1.1. The controllers also support
the Serial ATA II (SATA II) protocol defined by the Serial ATA
specification, version 2.5. The SATA II specification, version 2.5, is an
integrated version of previous SATA specifications, including SATA 1.0a
and extensions to SATA 1.0a. In addition, the SAS RAID controllers
support the following SATA II features:
•
3 Gbit/s SATA II
•
Staggered spin-up
•
Hot plug
•
Native command queuing
•
Activity and fault indicators for each PHY
•
Port selector (for dual-port drives)
Each port on the SAS controllers supports SAS devices, SATA II devices,
or both using the SSP, SMP, STP, and SATA II. The SSP enables
communication with other SAS devices. SATA II enables the SAS
controllers to communicate with other SATA II devices.