File system mounts and unmounts

Before performing a backup, you must mount all file systems you want to back up and unmount all file systems you do not want to back up.

The Backup Methods procedure backs up only mounted file systems in the rootvg. You must, therefore, mount all file systems you want to back up before starting. Similarly, you must unmount file systems you do not want backed up.

This backup procedure backs up files twice if a local directory is mounted over another local directory in the same file system. For example, if you mount /tmp over /usr/tmp, the files in the /tmp directory are backed up twice. This duplication might exceed the number of files a file system can hold, which can cause a future installation of the backup image to fail.