Service manual

3-6 Sun Ultra 2 Series Service Manual • July 1996
3.4 Maximum and Minimum Levels of
POST
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, a nonvolatile random access memory (NVRAM) variable.
The default setting for diag-level is max. An example of a max level POST output
on serial port A is provided in Section 3.4.1 “Diag-Level NVRAM Variable Set to
max” on page 3-6. An example of a min level POST output on serial port A is
provided in Section 3.4.2 “Diag-Level NVRAM Variable Set to min” on page 3-11.
To set the diag-level variable to min, type:
To return to the default setting, type the following:
3.4.1 Diag-Level NVRAM Variable Set to max
When the diag-level NVRAM parameter is set to max, POST enables an extended set
of diagnostic-level tests. This mode requires approximately 4.5 minutes to complete
with a dual CPU configuration and 640 Mbytes of memory installed, or
approximately 2.5 minutes to complete with a single CPU configuration and 640
Mbytes of memory installed. The following code example identifies a typical serial
port A POST output with the diag-level NVRAM variable set to max.
ok setenv diag-level min
ok setenv diag-level max
CODE EXAMPLE 3-1 diag-level Variable Set to max
{0} ok `Hardware Power ON
Master CPU online
Master Version: 0000.0000.2200.1040
Slave Version: 0000.0000.2200.1040
CPU E$(M) 0000.0000.0010.0000 (S) 0000.0000.0010.0000
Button Power ON