Storing data on tapes is considerably cheaper than storing data on disks. Tapes also have large storage capacities, ranging from a few hundred kilobytes to several gigabytes. Accessing data on tapes, however, is much slower than accessing data on disks. Tapes are sequential-access media, which means that to get to a particular point on the tape, the tape must go through all the preceding points. In contrast, disks are random-access media because a disk drive can access any point at random without passing through intervening points.

Because tapes are so slow, they are generally used only for long-term storage and backup. Data to be used regularly is almost always kept on a disk. Tapes are also used for transporting large amounts of data.

Tapes come in a variety of sizes and formats.

Tapes are sometimes called streamers or streaming tapes.

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Magnetic Tape Storage and Handling Guide
Describes how to properly store and care for magnetic media to maximize their life expectancies. Includes technical explanations for the rationale behind recommended procedures. This report is a joint project of the Commission on Preservation and Access and the National Media Laboratory.

Metal Particle Tape Guide
Explains the technology behind metal partical tape used for data storage applications.

Seagate Software Technology Papers
Good collection of technical papers about recent developments in the storage and data technology industries.

Tape Talk from Westek
Contains tips and the latest developments in tape backup, as well as links to Westek product information and related links.