During execution of remote installation to upgrade software, a remote-installation error may damage the previous version of the software. If the previous version is damaged, it becomes temporarily unavailable until remote installation is re-executed.

To avoid this, JP1/Software Distribution provides a package backup/restore facility. This facility backs up the previous version of software at the client during remote installation. If remote installation fails, the previous version is restored from the backup copy. This facility is available only when the package type is User programs and data.

You specify the backup/restore facility on the Options page in Packager's Software Distribution Packaging dialog box or the Remote Installation Manager's Change Installation Conditions dialog box.

The following figure shows an example of protecting the previous version from a remote-installation error.

Figure 2-62 Example of protecting the previous version from a remote-installation error