Scsi Controller; Raid Support - Intel SR4850HW4 - Server Platform - 0 MB RAM Product Manual

SCSI Controller

A single LSI 53C1030 Ultra320* LVDS controller provides the integrated SCSI interfaces. The
controller resides on PCI Bus Segment A (PX1A) off the Intel® IOP332 I/O Processor with Intel
XScale® Microarchitecture. It communicates as a 64-bit PCI-X* device for optimum performance.
The controller's PCI-X* interface operates at a bus speed of 100 MHz. The configuration registers
define PCI-related parameters for the LSI 53C1030 device. The LSI 53C1030 supports all
mandatory registers in the PCI configuration space header including the Vendor ID, Device ID,
Class Code, Revision ID, Header Type, and Command and Status fields.
The LSI 53C1030 supports two Ultra-320 LVDS channels. One is for control of internal drives, and
the other is for a high-speed connection to an external SCSI device. SCSI port A of the LSI
53C1030 controls the internal SCSI channel. The internal channel is routed to the Intel® Server
Platform SR4850HW4 and SR4850HW4/M SCSI backplane board via a SCSI U320 cable. The
internal channel has been validated only for LVDS operation. SCSI port B may be used for the
tape drive, external SCSI port, or an add-in adapter.
SATA Drive Support
Intel® Server Board SE8501HW4 main board has a 7-pin vertical connector supporting one SATA
(Serial ATA) port, which is integrated in the ICH-5 component. The port can support a serial data
transfer rate up to 1.5 Gb/second.

RAID Support

The Intel® Server Board SE8501HW4 supports on-board RAID through the Intel® IOP332 I/O
Processor with Intel XScale® Microarchitecture in conjunction with the LSI* 53C1030 SCSI
controller. The server platform supports RAID 0, 1, 5, 10, and 50 configurations. A 2MB flash
component and a non-volatile SRAM store the LSI code and hardware configuration information.
To activate this feature Intel® RAID Activation Key must be installed into the holder on the main
board and a DDR-2 DIMM must be installed into the RAID DIMM socket. This DIMM serves as
memory for the Intel® IOP332 Storage I/O Processor with Intel XScale® Microarchitecture, and as
a disk cache to store write data to the drives.
There is also an option to install the Intel® RAID Smart Battery. With the Smart Battery, if power
to the Intel® IOP332 Storage I/O Processor with Intel XScale® Microarchitecture drops below
specifications, the Intel® RAID Smart Battery maintains the contents of the DIMM. It keeps the
DIMM in self-refresh mode until power is restored. After power is restored, the data is safely
written to drives, maintaining the integrity of the disk array.
Intel® Server Platforms SR4850HW4 & SR4850HW4/M Product Guide 49