More often than not a lot of hunting must be done, and usually multiple backup tapes must be accessed and restored. Also, system administrators are not always available. A backup and archiving system is being worked out for Lab disks mounted under the various operating system types we use. System archive resolution is usually quarterly, twice-yearly, or yearly. System backups, on the other hand, are recycled on a regular basis, and provide data security between archives.
Incremental backups provide copies of files that have changed since the previous full backup.
System backup resolution will likely be weekly when it is implemented. There is another form of archive, the data archive, that most of you should be familiar with. The reason for this should be obvious. Data backups should also be kept by users for data, documents, etc. There are periodic system archives and backups being made, but these should not be relied on, due to their resolution.