IBM x 340 Series, Hardware Maintenance Manual, Page: 73 / 188

Installing options
65
Auxiliary-device (pointing device) port
The system board has one auxiliary-device port that supports a mouse or other
pointing device.
The following table shows the pin-number assignments for the auxiliary-device
connector on the rear of your server.
Ultra3 SCSI ports
Your server has an integrated dual-channel Ultra3 small computer system interface
(SCSI) controller. This controller supports two independent Ultra 160/m SCSI
channels: one internal and one external. Each of these channels supports up to 15 SCSI
devices. In addition, this controller uses:
• Double-transition clocking to achieve high transfer rates
• Domain name validation to negotiate compatible data transfer speeds with each
device
• Cyclic-redundancy checking (CRC), instead of the usual parity checking, to
significantly improve data reliability
• An active terminator on the system board for SCSI bus termination
You can use the external LVD SCSI channel connector, on the rear of your server, to
connect different types of small computer system interface (SCSI) devices. Inside the
server, a SCSI cable connects the internal SCSI channel connector to the hot-swap
drive backplane.
Note: If you install a PCI RAID adapter to configure and manage the internal hot-
swap drives, you must move the SCSI cable from the system-board SCSI
connector to an internal channel connector on the RAID adapter.
SCSI cabling requirements
If you plan to attach external SCSI devices, you must order additional SCSI cables. To
select and order the correct cables for use with external devices, contact your IBM
reseller or IBM marketing representative.
Table 14. Auxiliary-device connector pin-number assignments .
Pin Signal
1 Data
2 Not connected
3 Ground
4 +5 V dc
5 Clock
6 Not connected
6
4
2
1
3
5