HP Single Channel Ultra320 SCSI G2 Host Bus Adapter - Manual (Page 10)

Introduction
SCSI Connectors
The Single Channel Ultra320 SCSI HBA G2 has the following connectors:
Figure 1-1: Single Channel Ultra320 SCSI HBA G2
Item Description
1 External VHDCI connectors
2 Internal wide SCSI connector
The external connector is standard VHDCI connectors and mounted on the slot panel and
accessible through the back of the server. Screwlocks are provided on the external SCSI
cables to secure them to the VHDCI connectors.
Port Assignments
This adapter has one channel (Channel A) that supports one internal wide SCSI connector
and one external VHDCI connector. This arrangement enables direct connection to the
channel using existing or commonly available cables.
SCSI IDs
The Single Channel Ultra320 SCSI HBA G2 contains one SCSI bus that supports up to 15
peripherals. Channel A has internal and external connectors. The peripherals on the bus must
have a unique SCSI ID ranging from 6 to 0, then 15 to 8, with 6 being the highest priority and
8 being the lowest priority. SCSI IDs on all peripherals must be either manually set with
switches or jumpers on the device itself or automatically set on HP products that support
hot-pluggable drives. The SCSI IDs determine the priority of the peripheral device when
attempting to access the SCSI bus. The server assigns the SCSI adapter to the highest priority
by setting the ID of the adapter to 7.
For maximum performance, if both low- and high-throughput devices must be connected to
the same bus, assign the low-throughput devices a higher SCSI ID priority. This
configuration allows the low-throughput devices access to the bus.
HP Single Channel Ultra320 SCSI Host Bus Adapter G2 User Guide 1-3