Sun Microsystems Ultra 5, Руководство по обслуживанию

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Chapter 3 Power-On Self-Test 3-7
3.4 Maximum and Minimum POST Levels
Two levels of POST are available: maximum (
max
) level and minimum (
min
) level.
The system initiates the selected level of POST based upon the setting of
diag-level
, an NVRAM variable. The default setting for
diag-level
is
max
.
To set the
diag-level
variable to
min
before power-cycling the system, type:
To return to the default setting:
An example of a
max
-level POST output on serial port A is provided in Section 3.4.1
“diag-level Variable Set to max” on page 3-7. An example of a
min
-level POST
output on serial port A is provided in Section 3.4.2 “diag-level Variable Set to min”
on page 3-15.
3.4.1
diag-level
Variable Set to
max
When you set the
diag-level
variable to
max
, POST enables an extended set of
diagnostic-level tests. This mode requires approximately two minutes to complete
(with 128 Mbytes of DIMM installed).
CODE EXAMPLE 3-1
shows a typical serial port
A POST output with
diag-level
set to
max
.
Note –
Video output is disabled while POST is initialized.
ok% setenv diag-level min
ok% setenv diag-level max
CODE EXAMPLE 3-1
diag-level
Variable Set to
max
Power On Selftest Completed
Software Power ON0.0000.0000.0000 ffff.ffff.f00b.4100
0002.3333.0200.001b
@(#) Sun Ultra 5/10 UPA/PCI 3.9 P2.1 Version 9 created 1997/08/
05 16:24
Clearing E$ Tags Done
Clearing I/D TLBs Done
Probing Memory Done