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NOTE
Each SCSI channel on the A7173A adapter has an internal HD (high density) SCSI connector
for connecting internal SCSI devices and an external VHDCI (very high density cable
interconnect) SCSI connector for connecting external SCSI devices. HP does not support
connecting SCSI devices to both the internal and external SCSI connectors on the same SCSI
channel.
IMPORTANT If you connect LVD SCSI devices and SE SCSI devices to the same SCSI bus, the data transfer
rate will be limited to a maximum of 40 MB/s (Ultra SCSI), which is the maximum for SE
SCSI.
To view a list of supported peripheral devices see the HP A7173A PCI-X Dual Channel Ultra320 SCSI Host
Bus Adapter Support Matrix located at http://www.docs.hp.com.
Connecting Internal Devices
The A7173A adapter has two internal 68 pin HD connectors, one for each SCSI channel. Connection of
internal SCSI devices will be performed at the factory for HP systems that support internal SCSI devices. If
an internal SCSI device has been installed on one of the A7173A adapter's SCSI channels, HP does not
support connection of an external SCSI device to that same SCSI channel.
Connecting External Devices
The A7173A adapter has two external 68 pin VHDCI connectors, one for each SCSI channel. External SCSI
devices, may have 68 pin HD or VHDCI connectors. No SCSI cables are shipped with the A7173A adapter.
NOTE
Auto termination is factory enabled on the A7173A adapter. External terminators can be
ordered from HP, if necessary (order SCSI LVD/SE terminator: HP product number C2370A).
To connect external SCSI devices to the A7173A adapter:
Step 1. Plug the 68-pin VHDCI connector on one end of a SCSI cable into an external connector on the
A7173A adapter. Make sure the external connector you attach the SCSI cable to corresponds to the
channel you want to connect the external device to.
Step 2. Plug the 68-pin HD or VHDCI connector on the other end of the cable into the SCSI connector on
the external SCSI device.
Step 3. If you need to connect more than one external SCSI device to the adapter, "daisy chain" them
together with shielded external SCSI cables.
Chapter 2
HP-UX Installation: HP A7173A PCI-X Dual Channel Ultra320 SCSI Host Bus Adapter
Connecting SCSI Peripheral Devices
15
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