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Chapter 3 59
Troubleshooting
Dealing with a Boot Failure
Boot Command Notations
The boot command supports the following two notations:
• Mnemonic
• Path number
Type help scsi or help lan for more information on the boot path parameters.
Here are examples of mnemonic notation:
• boot with “no parameters” selects the primary boot path in stable storage.
• boot with the alternate or alt parameters selects the alternate boot path in stable
storage.
Here is an example of path number notation:
• boot p1 [Enter] attempts to boot from the second path in a list generated by a previous
search command.
Supported Boot Paths
SCSI devices are bootable when connected to the SCSI port on the system. Diskless
workstations can only boot from the LAN port on the system board. The workstation can
be booted from the CD-ROM for software installation.
ISL Environment
The ISL environment provides the means to load the operating system (HP-UX)
environment. The ISL environment also provides an off-line platform to execute diagnostic
and utility programs from a boot device when HP-UX does not load.
The ISL program is the first program loaded into main memory from an external media
(LAN, disk, or tape) and launched by the initial program loader (IPL) routine during the
Boot Administration environment.
The ISL environment provides the following capabilities:
• Execute user-entered commands to modify boot device paths and boot options in stable
storage.
• Run off-line diagnostic programs and utilities.
• Provide automatic booting of the HP-UX operating system after power-on or reset.
The ISL program provides a stand-alone environment for loading off-line diagnostic and
utility programs from the LIF directory. The ISL program also provides user commands to
configure the boot parameters into Stable Storage.