HP SC11Xe Host Bus Adapter Installation Guide

Installation procedure 7
Installing the adapter hardware
CAUTION: Electrostatic discharge can damage electronic components. Be sure you are properly grounded
before beginning this procedure. For more information, see "Electrostatic Discharge (on page 10)."
1. Depending on the server model, remove or open the server access panel.
WARNING: To reduce the risk of personal injury from hot surfaces, allow the drives and
the internal system components to cool before touching them.
2. Locate the PCIe bus expansion slots, and select the slot that you want to use. (For more information,
see the server documentation.)
3. Depending on the server model, remove the retaining screw or open the expansion slot latch that
secures the PCIe slot.
4. Remove the slot cover and save it. You will need to put it back if you decide to remove the adapter
and leave the slot empty.
5. Insert the adapter into the slot, and press it firmly into place. The contacts on the adapter edge must
be fully seated in the system board connector.
6. Depending on the server model, secure the adapter by replacing the retaining screw or by closing
the slot latch.
Connecting the adapter
This adapter supports only SCSI tape devices. You can connect up to 15 devices to this adapter through
its one SCSI bus. However, you must use only one of the connectors (internal or external) at a time. The
adapter will not function if both connectors are connected to devices.
You can use the adapter in the following ways:
• To connect external storage ("Connecting the adapter to external storage" on page 8)
• To replace the integrated SCSI controller ("Replacing the integrated SCSI controller" on page 8)
• To connect an internal tape drive ("Connecting an internal tape drive" on page 8)
SCSI IDs and SCSI bus termination
Each device on a SCSI bus must have a unique SCSI ID ranging from 6 to 0 or from 15 to 8. The ID value
of 7 is reserved for the adapter, which has the highest priority. A device with an ID of 6 has high priority
for accessing the SCSI bus, while a device with an ID of 8 has low priority. These IDs are automatically
set on HP products that support hot-plug devices. In other situations, you must manually set the IDs by
using switches or jumpers located on the device.
If you must manually set the IDs and you need to connect low- and high-throughput devices to the same
bus, maximize bus performance by assigning higher SCSI priority to the low-throughput devices. This
configuration enables the low-throughput devices to have access to the bus.
Both ends of a SCSI bus must be terminated to prevent signal degradation. Some devices (for example,
this adapter) automatically provide termination at one end when they are connected to the bus. The
situation for other devices is as follows:
• Non-hot-plug internal Ultra320, Ultra160, and Ultra2 tape drives require multimode or LVD-only
termination on the ribbon cable.
• Hot-plug drives do not require termination on the ribbon cable because terminators are included on
the drive backplane.
• Some HP tape storage systems provide termination. To determine whether a particular storage
system provides termination, see the storage system documentation.