Abstract: A method to write information to, or retrieve information from, an information storage medium disposed within a portable data storage cartridge moveably disposed in a data storage and retrieval system, wherein the data storage and retrieval system further comprises a data storage device. The portable data storage cartridge comprises a moveable curved door slidingly disposed within the enclosure, and a tape reel rotatably disposed within the enclosure, wherein the moveable curved door and the tape reel are non-concentric. The method retrieves the portable data storage cartridge from a storage slot, transports that portable data storage cartridge to a data storage device, disposes the portable data storage cartridge in the data storage device. The method further moves the moveable curved door from said a position to a second position, and reads information from and/or writes information to, the information storage medium.

Abstract: A seven-sided housing for an information storage medium, where one of those seven sides is moveable in two planes to allow access to an information storage medium disposed therein. A portable data storage cartridge which includes an information storage medium disposed in Applicants' housing. A method to read information from, and/or write information to, the information storage medium disposed within Applicants' portable data storage cartridge. An information storage and retrieval system which includes one or more of Applicants' portable data storage cartridges. A method to read information from, and/or write information to, an information storage medium disposed in Applicants' data storage cartridge. An information storage and retrieval system which includes a computer useable medium having computer readable program code disposed therein for writing information to and/or retrieving information from, an information storage medium disposed within Applicants' portable data storage cartridge.