Technical Product Specification

Intel® RAID Controller SRCSAS18E Hardware

Revision 1.01

Intel order number D61769-001

2.3.2 Flash Memory

The Intel

Advanced+ Book Block Flash Memory (C3) device, manufactured on Intel’s latest

0.13 µm and 0.18 µm technologies, represents a feature-rich solution for low-power applications.

The C3 device incorporates low-voltage capability (3 V read, program, and erase) with high-

speed, low-power operation. Flexible block locking allows any block to be independently locked

or unlocked. Additional information on this product can be obtained from the Intel

Flash

Memory website at http://www.intel.com/design/flash

This non-volatile storage can be accessed for firmware updates and recovery. For firmware

recovery, set the IOP mode-select jumper J7 to 0 Mode. Mode 0 firmware recovery requires the

use of a firmware recovery utility and a firmware image file.

2.3.3 SDRAM (Cache)

The Intel

RAID Controller SRCSAS18E includes a memory DIMM site and supports DDR2 400

ECC SDRAM registered memory with capacities from 256 MB to 1 GB (compatible 1 GB

modules not currently available). This memory is connected directly to the memory controller

interface bus of the IOP, 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 IOP memory

controller provides single-bit ECC error correction with multi-bit detection support. 1GB memory

modules that are compatible with the memory controller configuration are not currently in

production.

The Intel

Portable Cache Module 2 provides memory integrated with battery control logic and a

memory board battery. This module provides operational and cache memory needed to operate

the controller as well as a battery backup option for data cached in the memory.

2.3.4 SAS Controller

The LSI Logic* LSISAS1068 eight-port controller provides 1.5 and 3 Gb/s data transfer rates per

port (with 8 to 10-bit encoding this translates to about 150MB/s and 300MB/s), the controller

also leverages an electrical and physical interface that is compatible with Serial ATA

technology. The controller has the following features:

 8-port SAS/SATA controller

 1.5 and 3 Gb/s SAS and SATA data transfer rates per port, full duplex

 Port independent auto-negotiation

 Point to point SAS/SATA drive connection

 Supports SATA II

 Native command queuing (Post Launch)

 Port selector for dual-port drives

 64-bit, 133-MHz PCI-X* host interface

 Backward compatible with 33/66-MHz PCI

 Supports 3.3 volt signaling levels

 Hot plug/hot swap support