Sun Microsystems Sun Fire V440 Diagnostics And Troubleshooting Manual page 32

OpenBoot Configuration Variables (Continued)
TABLE 2-1
OpenBoot Configuration
Variable
post-trigger
obdiag-trigger
input-device
output-device
* POST messages cannot be displayed on a local graphics monitor. They are sent to ttya even when output-device is set to screen.
Likewise POST can accept input only from ttya.
Note – These variables affect OpenBoot Diagnostics tests as well as POST
diagnostics.
Diagnostics: Reliability versus Availability
The OpenBoot configuration variables described in
how diagnostic tests proceed, but also what triggers them.
By default, firmware-based diagnostic tests are disabled to minimize the amount of
time it takes for a server to reboot. However, skipping these tests does create some
system reliability risks.
14 Sun Fire V440 Server Diagnostics and Troubleshooting Guide • July 2003
Description and Keywords
Specifies the class of reset event that causes POST diagnostics or OpenBoot
Diagnostics tests to run. These variables can accept single keywords as well as
combinations of the first three keywords separated by spaces. For details, see "How to
View and Set OpenBoot Configuration Variables" on page 54.
• error-reset—A reset caused by certain nonrecoverable hardware error
conditions. In general, an error reset occurs when a hardware problem corrupts
system state data and the machine becomes "confused." Examples include CPU and
system watchdog resets, fatal errors, and certain CPU reset events (default).
• power-on-reset—A reset caused by pressing the Power button (default).
• user-reset—A reset initiated by the user or the operating system. Examples of
user resets include the OpenBoot boot and reset-all commands, as well as the
Solaris reboot command.
• all-resets—Any kind of system reset.
• none—No POST diagnostics or OpenBoot Diagnostics tests run.
Selects where system console input is taken from. Default is ttya.
• ttya—From serial and network management ports.
• ttyb—From built-in serial port B.
• keyboard—From attached keyboard that is part of a local graphics monitor.
Selects where diagnostic and other system console output is displayed. Default is
ttya.
• ttya—To serial and network management ports.
• ttyb—To built-in serial port B.
• screen—To attached screen that is part of a local graphics monitor.
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*
TABLE 2-1
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*
let you control not only