System Upgrade Information
Author: Copyright 2001 Compaq Computer Corporation
Description: Patch Kit Installation Instructions: Tru64 UNIX Patch Kits

# D System Upgrade Information

The Tru64 UNIX Update Installation procedure lets you upgrade your system from an earlier version, while preserving disk partitions, file systems, file customizations, the network print, and mail environments, user accounts, user created files, and any other system setup you may have done. Table D-1 lists the supported upgrades for Tru64 UNIX releases. (See the Tru64 UNIX Installation Guide for more information.)

### Table D-1: Upgrade Migration

Version | Upgrade Migration Supported
V5.1A | From 4.0G and 5.1
V5.1 | From 4.0G and 5.0A
V5.0A | From 4.0F and 5.0
V5.0 | From 4.0D and 4.0F
V4.0G | From 4.0E and 4.0F
V4.0F | From 4.0D and 4.0E