Functional Architecture

Intel® Server Board SE7520JR2

3.4.4SCSI Support

The SCSI sub-system consists of the LSI 53C1030 Dual Channel Ultra320 SCSI controller, one internal 80-pin connector (SCSI Channel A), one external high 80-pin density SCSI connector (SCSI channel B), and on-board termination for both SCSI channels.

3.4.4.1LSI* 53C1030 Dual Channel Ultra320 SCSI Controller

The LSI53C1030 is a PCI-X to Dual Channel Ultra320 SCSI Multifunction Controller that supports the PCI Local Bus Specification, Revision 2.2, and the PCI-X Addendum to the PCI Local Bus Specification, Revision 1.0a.

The LSI53C1030 supports up to a 64-bit, 133 MHz PCI-X bus. DT clocking enables the LSI53C1030 to achieve data transfer rates of up to 320 megabytes per second (MB/s) on each SCSI channel, for a total bandwidth of 640 MB/s on both SCSI channels.

SureLINK* Domain Validation detects the SCSI bus configuration and adjusts the SCSI transfer rate to optimize bus interoperability and SCSI data transfer rates. SureLINK Domain Validation provides three levels of domain validation, assuring robust system operation.

The LSI53C1030 integrates two high-performance SCSI Ultra320 cores and a 64-bit, 133 MHz PCI-X bus master DMA core. The LSI53C1030 employs three ARM* ARM966E-S processors to meet the data transfer flexibility requirements of the Ultra320 SCSI, PCI, and PCI-X specifications. Separate ARM processors support each SCSI channel and the PCI/PCI-X interface.

These processors implement the LSI* Logic Fusion-MPT* architecture, a multithreaded I/O algorithm that supports data transfers between the host system and SCSI devices with minimal host processor intervention. Fusion-MPT technology provides an efficient architecture that solves the protocol overhead problems of previous intelligent and non-intelligent adapter designs. LVDlink* technology is the LSI Logic implementation of Low Voltage Differential (LVD) SCSI. LVDlink transceivers allow the LSI53C1030 to perform either Single-Ended (SE) or LVD transfers.

The LSI* 53C1030 SCSI controller implements a regular SCSI solution or a RAID On MotherBoard (ROMB) solution. This RAID functionality is included in the LSI option rom and allows the user to select either Integrated Mirroring (IME) or Integrated Striping (IS) RAID mode. The system BIOS provides a setup option to allow the user to select one of these two modes

The LSI Logic BIOS Configuration Utility or the IM DOS Configuration Utility is used to configure the IME and IS firmware attributes. Using the LSI Logic BIOS and drivers adds support of physical device recognition for the purpose of Domain Validation and Ultra320 SCSI expander configuration. Host-based status software monitors the state of the mirrored drives and reports error conditions as they arise.

3.4.4.1.153C1030 Summary of Features

The Ultra320 SCSI features for the LSI53C1030 include:

•Double transition (DT) clocking

•Packetized protocol

•Paced transfers

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Revision 1.0

 

C78844-002