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54 Sun Fire V490 Server Administration Guide • August 2004
You can obtain environmental status at any time, regardless of whether OpenBoot
environmental monitoring is enabled or disabled. The .env status command simply
reports the current environmental status information; it does not take action if
anything is abnormal or out of range.
For an example of .env command output, see “How to Obtain OpenBoot
Environmental Status Information” on page 155.
About OpenBoot Emergency Procedures
The introduction of Universal Serial Bus (USB) keyboards has made it necessary to
change some of the OpenBoot emergency procedures. Specifically, the Stop-D,
Stop-F, and Stop-N commands that were available on systems with non-USB
keyboards are not supported on systems that use USB keyboards, such as the Sun
Fire V490 system. The following sections describe the OpenBoot emergency
procedures for systems like the Sun Fire V490 server that accept USB keyboards.
Stop-A Functionality
Stop-A (Abort) issues a break that drops the system into OpenBoot firmware control
(indicated by the display of the ok prompt). The key sequence works the same on
the Sun Fire V490 server as it does on older systems with non-USB keyboards, except
that it does not work during the first few seconds after the machine is reset.
Stop-D Functionality
The Stop-D (Diags) key sequence is not supported on systems with USB keyboards.
However, the Stop-D functionality can be closely emulated by turning the system
control switch to the Diagnostics position. For more information, see “System
Control Switch” on page 15.
The RSC bootmode diag command also provides similar functionality. For more
information, see the Sun Remote System Control (RSC) 2.2 User’s Guide, which is
included on the Sun Fire V490 Documentation CD.