Use the DEFMEDIA Record to designate the media type defaults that CA VM:Tape uses when media type information is not specified on MOUNT SCRATCH commands. This Record is required and you must enter at least one media type.
List the media types on the DEFMEDIA Record in order of preference. When CA VM:Tape needs to select a media type for a scratch tape mount request, it checks the density specified on the request to determine whether the media type listed first on the DEFMEDIA Record is compatible with that density. If the first media type is not compatible, CA VM:Tape tries to select the second media type listed, then the third media type listed, and so on.
After all specified media entries are read, any internally known media types are appended to the list.
Note: For a list of all media types, see DEFDENS Record.
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