A general term for a class of devices for backing up data to a magnetic tape for disaster recovery planning and archiving purposes. A number of technologies with incompatible tape formats have been implemented in these devices.
The following list describes some of the formats. Note that the capacity and speed of tape drives is rapidly improving. This list gives you an idea of the range of possibilities. Note also that the capacities mentioned in this list are for uncompressed data.
With data compression, most of these formats can approximately double the amount of data they hold.