Sun Microsystems Fire 880, Руководство пользователя

Страница: 99 / 236

Chapter 3 Hardware Configuration 81
About Hardware Jumpers
The hardware jumpers in the Sun Fire 880 server have the following functions:
■
J2902 and J2903 on the system I/O board are used to configure the serial ports for
either EIA-423 or EIA-232D operation. For information about the EIA-423 and
EIA-232D jumper settings, see “About Serial Port Jumpers” on page 82.
■
J3002, J3003, and J3004 are used to affect the operation of the OpenBoot flash
PROM located on the system I/O board. See “About Flash PROM Jumpers” on
page 83.
■
J01701, J01003, and J0803 are used to affect the operation of the flash PROM
located on the FC-AL disk backplane. See “About Flash PROM Jumpers” on
page 83.
■
J0403 is used to affect the operation of the FRU SEEPROM located on the RSC
card. See “About Flash PROM Jumpers” on page 83.
Note – All internal jumper modifications must be performed only by qualified
service personnel.
Note –
Do not change the configuration of J0501 and J0502 on the RSC card from the
default settings; otherwise, the RSC card will not boot.
All jumpers are marked with identification numbers. For example, the serial port
jumpers on the system I/O board are marked J2902 and J2903. Jumper pins are
located immediately adjacent to the identification number. The default jumper
positions are indicated with shaded regions. Pin 1 is marked with an asterisk (*) in
any of the positions shown below.
Pins
Jumper number
J 2XXX
*
*
*
*
*
*
Asterisk indicates pin 1
Shaded region indicates
default jumper position