Ignite-UX Installation Booting

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Section I: Installation and recovery booting processes
This section provides a high-level outline of the system booting process that occurs prior to
installation or recovery of the HP-UX operating system using Ignite-UX.
HP9000 systems:
Booting from a CD or DVD
System booting from a CD or DVD is as follows:
1. The command to boot from the CD or DVD is entered at the boot console.
Please consult the documentation appropriate to the system for information on how to
boot from
CD/DVD
.
2. The firmware reads the LIF from the boot device and copies the ISL from the location on the
device designated by the ISL LIF entry.
3. ISL is invoked.
It is assumed that you did not answer y when asked, “Do you want to interact with IPL?” The
booting process is different if you answer y, since ISL does not read and automatically execute
the AUTO file.
4. ISL reads the AUTO file from the LIF on the boot device.
For installation media, the typical contents of the AUTO file are hpux (;0):INSTALL, while
for a normal system boot the contents are hpux (;0)/stand/vmunix. ISL completes the
(;0) information read from the AUTO file to include the full device information.
5. ISL reads the secondary loader and invokes it with the options described in the previous step.
The secondary loader, hpux, reads the file name part of the boot command. The ':' (colon) in
the boot command means the kernel is to be read from the LIF on the boot device, whereas in a
normal boot command the file name starts with '/' (forward slash) to indicate it is to be read
from a file system.
Note:
ISL might also alter the name of the installation kernel to prepend a
W if the PDC indicates that the system can only run a 64-bit kernel.
The translation to add a “W” was new at HP-UX 11.0.
6. The secondary loader loads the installation kernel and invokes it.
By its name the kernel knows that it has been loaded as INSTALL (or one of the
[W|V|I]INSTALL kernels), so it must act as an installation kernel. Early in the boot process it
has to load the corresponding [W|V|I]INSTALLFS file system into a RAM disk.
The installation file system is very limited in size, approximately 8MB for HP9000 systems.
7. The kernel loads the installation file system from the LIF into the RAM disk.