QIC-EX (QIC-EXtra) was a modification to the Quarter Inch Cartridge format, introduced by the Verbatim Corporation.
By making the cartridges physically longer, they could accommodate larger spools. In many cases a standard QIC drive can use the extended length to store additional data, however in some cases an attempt to reformat a QIC-EX cartridge fails since the time taken to traverse the extra length triggers a timeout in the drive or controlling software intended to detect a broken tape.
QIC-EX cartridges are available in quarter-inch tape formats for QIC Minicartridge drives as well as in 8mm tape for Travan drives.
Sources / Resources
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