IBM 1311-2 Disk Drive Unit (1963)

The IBM 1311 disk drive units were introduced in 1963 and had a 50 track per inch (TPI) storage density.

The model pictured was once used with the IBM 1401 CPU.

History of Computing

An Encyclopedia of the People and Machines that Made Computer History

Copyright © 1982-2000, Lexikon Services "History of Computing" ISBN 0-944601-78-2

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