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Upgrading HP UNIX from 11.1 to 11.23

Prem Mehrotra
Occasional Advisor

Upgrading HP UNIX from 11.1 to 11.23

Subject: Upgrading HP UNIX 11.1 to 11.23
I am on HP-999 PA RISC. Currently we have 11.1. We want to upgrade to 11.23.
Can upgrade be done in place and in case there are problems in any existing applications,
Can upgrade be rolled back.

I think answer to both questions is yes. But I am not a System Administartor, so just checking.
Pete Randall
Outstanding Contributor

Re: Upgrading HP UNIX from 11.1 to 11.23

The overwhelming preference among Forum members it to do a cold install, rather than an upgrade. In either case, an Ignite backup prior to the update/install will provide excellent rollback capability.

By the way, what is a HP-999? I've never heard of such a model number and am not sure it would support 11.23. What does the "model" command return?


Sharma Sanjeev
Respected Contributor

Re: Upgrading HP UNIX from 11.1 to 11.23

Hi Prem

There are two types of upgrade
one is cold install & another is update-ux.

You cannot rollback if you don;t have ignite backup.

Everything is Possible as " IMPOSSIBLE" word itself says I M POSSIBLE
Steven E. Protter
Exalted Contributor

Re: Upgrading HP UNIX from 11.1 to 11.23


upgrade is run with upgrade-ux. It is a historically buggy tool. The chances of success are inversely proportional to the complexity of the system. It is not widely known, but some application vendors such as oracle do not support their software on systems that have been updated using update-ux.

If you take an Ignite make_tape_recovery or make_net_recovery (to a NFS share), you absolutely can undo any damage upgrade-ux does to your system by restoring the system to the state it was prior to the upgrade.

Cold install, followed by reinstallation of applications is favored by veteran systems administrators on this forum.

In the interest of full disclosure: I have 11 years experience doing systems administration on HP-UX. Due to the global and local economy, I am not working in IT and my access is limited to a pair of old D class servers running HP-UX 11.23 and a small Linux lab in my home office. In my last job I supported hundreds of RHEL based Linux Servers, hundreds of HP-UX servers ranging from HP-UX 10.20 to 11.31.

This is a peer to peer forum and the information you get is not guaranteed, is based on experience, and is often affected by this experience and filtered by communications and language issues.


Steven E Protter
Owner of ISN Corporation
James R. Ferguson
Acclaimed Contributor

Re: Upgrading HP UNIX from 11.1 to 11.23


I would choose a cold-installation preceded by an Ingite recovery image creation. As Pete noted, an Ignite recovery is your easist roll-back choice.

You don't offer any configuration details. Make sure that your actual model is supported. The installation guide for 11.23 will document that. Read it.

One reason that a cold-install may prove to be the best course is that filesystems on 11.23 require a bit more space than before. A cold-install will allow you to satisfy the requirements without undue effort.


Roopesh Francis_1
Trusted Contributor

Re: Upgrading HP UNIX from 11.1 to 11.23

You need to ensure all of your running application in current version will support 11.23 also.
Take a ignite backup of your hp ux 11.11 first.
Do a cold installation of 11.23 and set up all the applications and test.if you find any issues restore the server from old ignite.check the document given by james before you start
Acclaimed Contributor

Re: Upgrading HP UNIX from 11.1 to 11.23

"I am on HP-999 PA RISC"

Please explain!


# model

to get the server model.

Hope this helps!

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