Technical Product Specification

Intel® RAID Controller RS2BL080 and RS2MB044 Technical Product Specification Hardware

Revision 2.1

Intel order number E64388-004

2.3 Major Components

The major components of the Intel

RAID Controller RS2BL080 and RS2MB044 are described

in the subsections that follow.

2.3.1 LSI* SAS2108 ROC

The LSI* SAS2108 RAID-On-Chip (ROC) is an integrated SAS and I/O controller with an

embedded Power PC* 440 core running at 800 MHz. For more information, see

http://www.lsi.com/

. The LSI* SAS2108 ROC provides the following functions:

 x8 PCI Express* bus operating at 6.0 Gbps serial transfer rate

 Spread Spectrum Clocking (SSC)

 SAS/SMP/STP/SATA support

 Supports SAS and SATA devices

 Initiator and Target mode (SSP)

 Wide port support

 T10 End-to-End Data Protection (EEDP)

 Local 72-bit DDR2 SDRAM interface with ECC checking

 Fusion MPT message unit

 PCI Express* interface supports x8, x4, and x1 lane configurations

2.3.2 Flash ROM

An 8-MB CFI-compliant flash ROM is used to accommodate RAID firmware and RAID BIOS

Console 2 OpROM.

2.3.3 Boot Strap ROM (SEEPROM)

The serial bootstrap ROM is used to configure the LSI* SAS2108 ROC before the server board

configures the PCI Express* registers. The bootstrap ROM sets the Phase Lock Loop (PLL)

dividers, bootstrap configuration, and so on.

2.3.4 NVSRAM

A 32-KB NVSRAM is used to store disk and drive setup information.

2.3.5 SDRAM (Cache)

The Intel

RAID Controller RS2BL080 and RS2MB044 include 512 MB of integrated DDR2 800

MHz ECC SDRAM memory. This DIMM is connected directly to the memory controller interface

bus of the ROC and serves as storage for the executable code transferred from the flash. It also

serves as cache during RAID transactions. Cache mode selection takes immediate effect while

the server is online and is available on a per virtual drive basis. The ROC memory controller

provides single-bit ECC error correction with multi-bit detection support.

The Intel

RAID Controller RS2BL080 and RS2MB044 support Intel

RAID Smart Battery

AXXRSBBU7 only.