Package Upgrades

Package Upgrade is the replacement of a package with its newer version to enhance functionalities or fix software defects.

Package upgrades are based on the following two scenarios:

• Packages that are installed on the data drive or the RAM drive can be upgraded directly by installing a SIS file of type SA, SP or PU.

• Packages that are installed on the ROM drive can be upgraded only by means of eclipsing. For details on how to upgrade package files on ROM, see Upgrading OS Components.

Orphan files that are not installed by an installation package can be overwritten only if the device creator has enabled the corresponding option (AllowOrphanedOverwrite) in the installation policy file.

For information, see Secure Software Install Reference.

The following sections provide details on upgrade types and how these types are used in system upgrade and preinstalled package upgrades:

• Upgrade Types
  
• System Upgrades
  
• Preinstalled Package Upgrades