Modify patching of NetBackup to keep from exceeding allocated disk space.

When patching from 6.5.1 to 6.5.4 on Unix and Linux that the process was unable to do the upgrade due to space issues even though the installation directory was sized properly for a NetBackup installation. Unfortunately this size does not seem to account for the amount of space required to apply patches and updates. On servers where all available space has been allocated to business needs, it is not possible to resize the file system each time a patch needs to be applied.

It seems to make sense that after failing when checking for adequate space for the patch that the script would show how much space would be freed if a suggested set of files were removed, aka NB-Java-tar.Z (96 MB). Also giving the space that would be freed if the binaries from the version being patched were not backed up or the option given to copy them to a different location.

A different approach could be to initiate a backup job for the files being modified so that in the event they needed to be backed out, they could be restored from the backup. Once the backup is completed then the files could be overwritten.