Hardware and Software Installation Procedure
Step 4: Connect the SCSI peripherals
5
Step 4: Connect the SCSI peripherals
You can connect as many as 15 other SCSI devices to each port on this card by chaining them together serially
with shielded external SCSI cables.
The maximum length of the SCSI bus is 12 meters when using LVD signalling and 6 meters when using SE.
• Plug the 68-pin very high density cable interconnect (VHDCI) connector on the shielded external cable
into SCSI port A or B.
• Plug the 68-pin connector on the other end of the shielded external SCSI cable into the SCSI connector on
your external SCSI device.
SCSI Bus Termination
The pieces of equipment on the ends of a SCSI bus normally have terminators. Remove or disable
termination on all other SCSI devices or initiators in the middle of the bus. This card’s SCSI ports have
automatic termination when shipped from the factory--no physical terminators are required on unused
ports of the card.
Please be aware of the following conditions:
— Connect only external SCSI devices to this SCSI card. Terminate the last external device on the SCSI
bus, and disable the termination on all other devices. Termination on this SCSI card is automatically
enabled in this case (if the jumper is off).
— Low-voltage differential peripheral devices are normally terminated with external terminators but
are sometimes set with jumpers or a switch on the peripheral. Refer to the device manual to identify
terminator settings and how to change them.
Step 5: Power Up the system
• Determine the SCSI ID required for each device on the SCSI bus.
• Power up the system.
• Record the IDs of the SCSI ports on this card.
Setting SCSI IDs Offline
For PA-RISC based systems, you can use the Boot Console Handler (BCH) menus to set SCSI IDs offline
according to the instructions in the manual HP A7173A PCI-X Dual Channel Ultra320 SCSI Host Bus
Adapter Support Guide available at http://docs.hp.com.
For Itanium based systems, use EFI to set the SCSI IDs offline. See the HP A7173A PCI-X Dual
Channel Ultra320 SCSI Host Bus Adapter Support Guide for details.
Setting SCSI IDs Online
For all supported systems (HP Integrity or HP 9000), you can use the mptconfig command to display and
set SCSI IDs online . See the HP A7173A PCI-X Dual Channel Ultra320 SCSI Host Bus Adapter Support
Guide for details.
NOTE Peripheral device SCSI IDs are typically determined automatically by the storage
enclosure, or they may be set manually by a switch on the storage enclosure. Refer to the
peripheral device documentation, to determine how the SCSI ID of each peripheral device
is set, and how to change it.
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