IBM 8647 - Eserver xSeries 225, Руководство по техническому обслуживанию и устранению неисправностей

Страница: 86 / 182

6
4
2
1
3
5
If you attach a keyboard to this connector, USB ports and devices are disabled
during the power-on self-test (POST).
Parallel connector
Use this connector to connect a parallel device. The following illustration shows a
parallel connector.
13 1
25 14
The parallel connector supports three standard Institute of Electrical and Electronics
Engineers (IEEE) 1284 modes of operation: standard parallel port (SPP), enhanced
parallel port (EPP), and extended capability port (ECP). If you configure the parallel
port to operate in bidirectional mode, it supports the ECP and EPP modes of
operation. To configure the parallel port, use the
Devices and I/O Ports option in
the Configuration/Setup Utility program. See the User’s Guide for more information.
If you configure the parallel port to operate in bidirectional mode, use an IEEE
1284-compliant cable that does not exceed 3 meters (9.8 ft).
Serial connectors
Use the serial connectors to connect serial devices. The following illustration shows
a serial connector.
1 5
6 9
Ultra320 SCSI connector
You can install up to four internal SCSI devices using the SCSI cable that comes
with some models of the server. Other server models might come with one SCSI
cable that is connected from the internal SCSI channel A connector to the standard
hot-swap-drive backplane. You can attach additional internal SCSI devices to the
other internal SCSI channel B connector, or you can use channel B for external
SCSI devices. To use channel B for external SCSI devices, remove the SCSI
knockout from the rear of the server and secure the free end of an optional channel
B cable in the new opening.
If you want to attach external SCSI devices to the server without using the internal
SCSI channel B, you must install an optional SCSI adapter.
Notes:
1. External SCSI devices connected to internal SCSI channel B will operate
asynchronously.
2. 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 (except for the
ServeRAID-5i controller, which uses the system-board integrated SCSI controller
with RAID capabilities). See “Cabling an optional SCSI adapter” on page 48 for
additional information.
76
IBM xSeries 225 Type 8647: Hardware Maintenance Manual and Troubleshooting Guide