A high-capacity data storage system for storing, retrieving, reading and writing multiple magnetic tape cartridges. Also called a "tape automation system," it contains storage racks for holding the cartridges and a robotic mechanism for moving the cartridge to the drive.Tape libraries were made for almost every size and type of magnetic tape cartridge, but only the larger ones survived. Small libraries had a handful of drives and held up to several hundred cartridges. Large units support dozens of drives and thousands of cartridges.Accessing data in a tape library takes from a few seconds to a minute or more in order to retrieve and load the cartridge into the drive and locate the data on the tape. See cartridge and magnetic tape.