Sun Microsystems SPARCcenter 2000 Service Manual page 41

Controlling Area Actions
OpenBoot The program boots the system by loading the
operating system from the root disk drive.
The root disk is usually drive number 0 in the
bottom disk drive tray in the system cabinet,
but this location is not mandatory and can
differ for your system.
To read OBP messages, connect the console
(serial ASCII terminal) to the system master. If
the console is connected to the wrong system
board, messages will NOT appear on the
screen.
Operating system The operating system loads into memory and
(UNIX) begins running.
If a hardware failure occurs while the system
is running, POST can automatically configure
around the failure, and reboot.
JumpStart automatic When the system is started for the first time
installation program under Solaris 2.X, the JumpStart automatic
installation feature will install the system (if
the hardware is connected to network or to a
CD-ROM drive containing a Solaris release
CD-ROM.) If a server-specific configuration
file is not also present on the disk drive,
JumpStart may configure the server incorrectly
(as a stand-alone workstation.)
Table 2-1 Hardware and Software Control of the System (Continued)
Troubleshooting Overview
Observations and Verification
If set to verbose mode, OpenBoot displays on
the terminal a list of the hardware options
found in the system.
On the system master, the eight lower (yellow)
LEDs cycle constantly.
The yellow LEDs of all other system boards
should stay on, without cycling.
On any system board, if the yellow LEDs are
off, the board has failed POST.
For all system boards, the top two (green)
LEDs indicate that 0, 1, or 2 SuperSPARC
modules are present on the board and are
functional.
All yellow system board LEDs should be
flashing in a cyclical pattern, except on boards
that have no SuperSPARC modules.
Determine if the proper configuration
information is on the disk by reading the card,
JumpStart Installation Instructions, which is
provided with the system documentation set.
To prevent JumpStart installation at the initial
powering up, disconnect the system from the
network, and ensure that a Solaris release
CD-ROM is not in the CD-ROM drive.
If JumpStart automatic installation begins,
interrupt it by pressing L1-A (or Stop-A).
If JumpStart installs the wrong configuration,
reinstall Solaris 2.X manually.
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