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U320 Installation Guide

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Figure 5-1 Identifying SCSI Cable Connectors
1
32
4
3
Internal 50-pin Narrow SCSI cable connector
1
68-pin External HD (high density) SCSI cable
connector
4
Internal 68-pin Wide SCSI cable connector
2
External Offset VHDCI (very high density
cable interconnect) SCSI cable connector
Connecting Internal Devices
The A7173A adapter has two internal 68 pin HD connectors, one for each SCSI channel. If you
purchased your A7173A adapter as a factory-integrated controller (ordered on product option
0D1), any internal SCSI devices will be connected at the factory. If an internal SCSI device has
been installed on one of the A7173A adapter’s SCSI channels, do not connect any devices to the
external port for that 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:
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.
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.
3. If you need to connect more than one external SCSI device to the adapter, “daisy chain”
them together with shielded external SCSI cables.
Using the EFI Utility on HP Integrity Systems
If the A7173A adapter is installed in a supported HP Integrity® system, a menu driven Extended
Firmware Interface based Parallel SCSI Offline Operations Utility (EFI utility) can be used to set
or confirm the SCSI parameters offline. The EFI utility can also be used offline to update the
A7173A adapter firmware, save the A7173A adapter firmware to a file, and view the A7173A
adapter vital product data (VPD). The executable file name of the EFI utility is: pscsi.efi
Using the EFI Utility on HP Integrity Systems 23