LSI 320 3.1.2 LSI21320 Dual Channel Host Adapters

3.1.2 LSI21320 Dual Channel Host Adapters

The LSI Logic LSI21320 and LSI21320-R are dual channel Ultra320 SCSI to PCI-X host adapters that provide two Ultra320 SCSI channels. The SCSI Channel A interface is made through connectors J2 and J4. The SCSI Channel B interface is made through connector J3. See Figure 3.3 for details.

Features of the LSI21320 host adapters are:

•Two independent Ultra320 SCSI channels

•Three SCSI connectors:

–One external 68-pin high density connector

–Two internal 68-pin high density connectors

•LVD/SE termination

•LSI Logic Integrated Mirroring (IM) technology for boot volume and operating system protection (IM is for the LSI21320-R only)

•Fusion-MPT Architecture

Details of the LSI21320 and LSI21320-R host adapters are:

•J1: PCI and PCI-X, 64-bit, universal type board edge connector

•J2: 68-pin high density cable right-angle external connector

•J3 and J4: 68-pin high density right-angle internal connectors

•J6: 4-pin low density un-shrouded right-angle LED connector

•Subsystem Vendor ID: 0x1000

•Subsystem ID: 0x1040

During system initialization, the system loads the ID numbers into the Subsystem Vendor ID and Subsystem ID registers of the embedded SCSI controller.

Figure 3.3 illustrates the LSI21320 or LSI2120-R host adapter board.

3-4	Ultra320 SCSI Host Adapter Board Characteristics

Rev. 2.0