HP-UX 11i Installation and Update Guide, March 2003

Choosing a Migration Path
Deciding Which Method to Use
Chapter 228
Deciding Which Method to Use
Now that you have evaluated your system and ordered any additional
needed hardware, you need to decide whether to cold-install HP-UX 11i
on your system or update it.
Cold-install means installing system software on a new (un-installed)
or existing system disks by completely rebuilding the volume group (see
“Back up Your System!” on page 79), erasing the existing operating
system and data on that volume and installing the new operating system
and specified software and data. An advantage of cold-install is that
supported software can be installed without regard for the software
currently on the system, or concern for cleaning up old software.
Update means using the update-ux command and Software Distributor
(SD) tools to selectively overwrite the operating system and application
software from a media or network source depot. An advantage of
performing an update is that it leaves user data, configuration, and
applications in place. Updating to HP-UX 11i requires that the system be
running at 10.20 or 11.0, with or without extension or Additional Core
Enhancement (ACE) packs installed.
CAUTION If the Distributed File System (DFS) is installed and in use on your
HP-UX 10.20 system to manage large numbers of files, update-ux will
remove it and associated data during the update to HP-UX 11i. If you
need to continue using DFS, do not update to HP-UX 11.x or HP-UX
11i.
Depending on your system’s current configuration, here are some general
guidelines to help you choose the best migration path to HP-UX 11i.