HP-UX Reference (11i v1 05/09) - 1M System Administration Commands A-M (vol 3)

i
isl(1M) isl(1M)
(Series 800 Only)
NAME
isl - initial system loader
DESCRIPTION
isl implements the operating system independent portion of the bootstrap process. It is loaded and exe-
cuted after self-test and initialization have completed successfully.
The processor contains special purpose memory for maintaining critical configuration related parameters
(e.g. Primary Boot, Alternate Boot, and Console Paths). Two forms of memory are supported: Stable
Storage and Non-Volatile Memory (NVM).
Typically, when control is transferred to isl,anautoboot sequence takes place. An autoboot sequence
allows a complete bootstrap operation to occur with no intervention from an operator. isl executes com-
mands from the autoexecute file in a script-like fashion. autoboot is enabled by a flag in Stable Storage.
autosearch is a mechanism that automatically locates the boot and console devices. For further informa-
tion, see pdc(1M).
During an autoboot sequence, isl displays its revision and the name of any utility it executes. However, if
autoboot is disabled, after isl displays its revision, it then prompts for input from the console device.
Acceptable input is any isl command name or the name of any utility available on the system. If a non-
fatal error occurs or the executed utility returns, isl again prompts for input.
Commands
There are several commands available in isl. The following is a list with a short description. Parameters
may be entered on the command line following the command name. They must be separated by spaces. isl
prompts for any necessary parameters that are not entered on the command line.
?
help Help - List commands and available utilities
listf
ls List available utilities
autoboot Enable or disable the autoboot sequence
Parameter - on or off
autosearch Enable or disable the autosearch sequence
Parameter - on or off
primpath Modify the Primary Boot Path
Parameter - Primary Boot Path in decimal
altpath Modify the Alternate Boot Path
Parameter - Alternate Boot Path in decimal
conspath Modify the Console Path
Parameter - Console Path in decimal
lsautofl
listautofl List contents of the autoexecute file
display Display the Primary Boot, Alternate Boot, and Console Paths
readnvm Display the contents of one word of NVM in hexadecimal
Parameter - NVM address in decimal or standard hexadecimal notation
readss Display the contents of one word of Stable Storage in hexadecimal
Parameter - Stable Storage address in decimal or standard hexadecimal notation
DIAGNOSTICS
isl displays diagnostic information through error messages written on the console and display codes on the
LED display.
For the display codes, CE0x are informative only. CE1x and CE2x indicate errors, some of which are fatal
and cause the system to halt. Other errors merely cause isl to display a message.
Section 1M−−386 Hewlett-Packard Company − 1 − HP-UX 11i Version 1: September 2005