(1) In Backup, Recovery, and Media Services, a multivolume tape group created as a result of a backup operation or archive operation. Media sets are managed as a group to provide consistent management of single and multivolume output and to provide integrity in cases where an individual volume in a media set is expired in advance of the remaining volumes.
(2) In software distribution and installation, a multivolume CD-ROM, CD-R, or tape group created for the purpose of distributing a selection of software to customers for installation on to the system. Some media sets, for example, a system software release upgrade media set, may consist of a collection of smaller media sets, each containing a specialized selection of the Licensed Internal Code, licensed programs, the operating system, and program temporary fixes needed to operate the system and use it to do business.