IBM eserver xSeries 350, User Reference Manual

Page: 79 / 174

Chapter 5. Installing options
67
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 port
on the rear of your server.
Ultra160 SCSI ports
Your server has an integrated dual-channel Ultra160 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 parity checking, to significantly
improve data reliability
• An active terminator on the system board for SCSI bus termination
The server comes with two SCSI cables; each cable is connected to one of the SCSI
channels. One SCSI cable connects the internal SCSI channel connector to the
standard hot-swap-drive backplane. The other SCSI cable is connected to the external
SCSI channel connector; however, this connector is cabled for internal use. If you
want to use the external LVD SCSI channel connector to connect external SCSI devices
to the server, remove the knockout on the rear of the server and install the LVD SCSI
cable that comes with the server.
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. See “Cabling
the ServeRAID adapter” on page 44 for additional information.
Table 9. 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