The IBM 2321 Data Cell is a discontinued direct access storage device (DASD) for the IBM System/360. It was announced with System/360 in April, 1964. It holds up to 400 megabytes of data, with an access time of 95 milliseconds to 600 milliseconds, depending on the addressed strip position and data arrangement in each data cell.[1]
The 2321 was withdrawn from marketing in January, 1975.