Well, The following represents a summary of the boot process for a Solaris 2.x system on Sparc hardware.
Power On: Depending on the system involved, you may see some output on a serial terminal immediately after power on. This may take the form of a Hardware Power ON message on a large Enterprise server, or a "'" or "," in the case of an older Ultra system. These indications will not be present on a monitor connected directly to the server.
POST: If the PROM diag-switch? parameter is set to true, output from the POST (Power On Self Test) will be viewable on a serial terminal. The PROM diag-level parameter determines the extent of the POST tests. (See the Hardware Diagnostics page for more information on these settings.) If a serial terminal is not connected, a prtdiag -v will show the results of the POST once the system has booted. If a keyboard is connected, it will beep and the keyboard lights will flash during POST. If the POST fails, an error indication may be displayed following the failure.
Init System: The "Init System" process can be broken down into several discrete parts:
* OBP: If diag-switch? is set, an Entering OBP message will be seen on a serial terminal. The MMU (memory management unit) is enabled.
* NVRAM: If use-nvramrc? is set to true, read the NVRAMRC. This may contain information about boot devices, especially where the boot disk has been encapsulated with VxVM or DiskSuite.
* Probe All: This includes checking for SCSI or other disk drives and devices.
* Install Console: At this point, a directly connected monitor and keyboard will become active, or the serial port will become the system console access. If a keyboard is connected to the system, the lights will flash again during this step.
* Banner: The PROM banner will be displayed. This banner includes a logo, system type, PROM revision level, the ethernet address, and the hostid.
* Create Device Tree: The hardware device tree will be built. This device tree can be explored using PROM monitor commands at the ok> prompt, or by using prtconf once the system has been booted.
For more details , Please visit the source site :
http://www.princeton.edu/~unix /Solaris/troubleshoot/bootseq.html
Answered by
Alok Gupta
, an ibibo Guru,
at
6:33 PM on October 11, 2008
