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Release Notes for HP-UX 10.20: HP 9000 Computers > Chapter 3 Major Changes for HP-UX 10.10

System Compatibility

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Upgrading from HP-UX 9.x to 10.x

This section points you to tools and other sources of information you will need to upgrade from HP-UX 9.x to 10.x.

If you are upgrading from an HP-UX 9.x release to 10.01 or 10.10, refer to Upgrading from HP-UX 9.x to 10.x, which details the steps you must take to upgrade. Also see this chapter, "Major Changes for HP-UX 10.10" and Chapter 4, "Major Changes for HP-UX 10.0 and 10.01" in this document for information on system changes that may require you to make changes to make your 10.x system work correctly.

If you are installing (not upgrading) 10.01 or 10.10, upgrading from 10.0 to 10.01 or 10.10, or upgrading from 10.01 to 10.10, see Installing HP-UX 10.10 and Updating HP-UX 10.01 to 10.10.

Upgrading from 9.x to 10.10 is a two-step process:

  1. Upgrade to 10.01 (also load 10.01 applications and any optional 10.01 features you need)

  2. Upgrade to 10.10

Upgrading from HP-UX 9.x to 10.x details the above steps, as well as necessary preparation steps.

Some 9.x systems cannot be upgraded to 10.01 with the upgrade tools supplied with the initial 10.01 release. These systems are:

  • HP-UX "DUX" clusters

  • Systems running HP-UX 9.07

  • Series 700 Model J systems

  • C100/110

These systems can now be upgraded using the tools and documentation in the package "HP-UX Upgrade Tools for 9.x to 10.x". However, if you are running on a 9.07 system, you must upgrade all the way to 10.10; you cannot stop at 10.01. All of the other systems listed above can be upgraded to 10.01 or 10.10 (via 10.01). Again, see Upgrading from HP-UX 9.x to 10.x for details.

Compatibility with Systems Before HP-UX 10.10

Applications you develop taking advantage of new 10.10 features will not necessarily run on earlier systems.

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