The A6828A adapter is capable of communicating with
Low Voltage Differential (LVD) or Single Ended (SE) SCSI devices.
LVD allows up to 12m cable lengths with multiple SCSI devices, or
25m point-to-point connections.
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 | IMPORTANT: As stated earlier
in this chapter, do not mix LVD SCSI devices with SE SCSI devices
on the bus. If you do so, the entire SCSI bus will change to SE.
This will limit the bus performance to Ultra SCSI (40 MB/s). |
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Make all external SCSI bus connections to the A6828A adapter
with shielded, 68-pin LVD cables. The connectors on the cable are
always keyed to ensure proper mating.
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 | NOTE: No cables or external
terminators are shipped with the A6828A adapter. Cables are usually
shipped with the external SCSI devices, and you can get external
terminators for
the A6828A HBA by ordering SCSI LVD/SE terminator (HP product number
C2370A). |
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Figure 2-1 “SCSI Cable for External Connections” below is a drawing
(not to scale) of a typical SCSI shielded 68-pin LVD cable.
To connect external SCSI devices to the A6828A adapter, perform
the following steps:
Plug the 68-pin
VHDCI connector on one end of a shielded external high density SCSI
cable into the adapter’s external connector (J2).
Plug the 68-pin HD connector
on the other end of the cable into the SCSI connector on the external
SCSI device.
If you need to connect more than
one external SCSI device to the adapter, daisy chain them together
with shielded external SCSI cables.
If auto termination is disabled and you want to terminate
the external connector on
the HBA, use SCSI LVD/SE terminator (HP product number C2370A).
For more information on auto termination, see “Auto Termination”.
When you have finished connecting the external devices, go
to the next section, “Specifying SCSI Parameters”.
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