Sun Microsystems Netra CT 410, Service Manual

Page: 67 / 296

Chapter 4 Troubleshooting the System 4-17
Both
ttya
and
ttyb
represent the serial ports on the CPU board.
screen
represents
the display attached to the first frame buffer installed in the system (not present on
the Netra CT server).
rsc
is used by the alarm card.
To see the console input device, enter:
The screen displays output similar to the following:
The possible settings for this variable are:
■ ttya
(default)
■
ttyb
■ keyboard
■
rsc
ttya
and
ttyb
represent the serial ports on the CPU board.
keyboard
represents
the standard system keyboard (not present on the Netra CT server).
rsc
is used by
the alarm card. If no system keyboard is connected, the console port defaults to
ttya
.
Note – Be sure the two variables are consistent with each other. For example, do not
set the output-device to
screen
and the input-device to
ttya
.
Another OBP variable controls the behavior of the POST process called
diag-
level
. By default, this variable is set to
max
, which means POST runs more
thorough (verbose) tests against the hardware. This variable can be set to
min
, which
runs a less stringent set of tests against the hardware. A minimum level of POST
testing takes less time, so the Solaris operating environment can boot more quickly
on a machine with
diag-level
set to
min
.
To run the maximum amount of POST tests, enter:
To run the minimum amount of POST tests, enter:
ok printenv input-device
input-device ttya
ok setenv diag-level max
ok setenv diag-level min