Hardware User's Guide

Intel® RAID Controller RS25FB044 Hardware User’s Guide 11
Major Components
LSI* LSISAS2308 Processor Chip
The LSI* LSISAS2308 Processor Chip provides the following functionality:
• The Chip provides eight independent PHYs, each supporting 6Gb/s and 3Gb/s SAS
data transfers per PHY.
• Supports SSP to enable communication with other SAS devices.
• Supports SMP to communicate topology management information.
• Supports single PHY or wide ports consisting of 2, 3, or 4 PHYs within a single
quad port.
• Allows addressing of multiple SATA targets through an expander if using SATA 3.0-
compliant hard disk drives.
• Allows multiple initiators to address a single target (in a fail-over configuration)
through an expander.
For more information, see http://www.lsi.com/.
Flash ROM
A CFI-compliant flash ROM is used to accommodate RAID firmware and IR RAID
configuration utility OpROM.
Boot Strap ROM (SEEPROM)
The serial bootstrap ROM is used to configure the LSI* LSISAS2308 Processor Chip
before the server board configures the PCI Express* registers. The bootstrap ROM sets
the Phase Lock Loop (PLL) dividers, bootstrap configuration, and so on.
Diagnostic Components
LED Placement and Function
The Intel
®
RAID Controller RS25FB044 contains a green system heartbeat LED that
indicates the card is capable of general activity.
SAS/SATA Connectors
The Intel
®
RAID Controller RS25FB044 provides one internal SFF8087 and one external
SFF8088/SATA signal connectors. Each connector provides support for four SAS/SATA
ports. The sideband signals are configured to adhere to the SFF-8485 Specifications for
SGPIO support.