Storage Module Device
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Storage Module Device (SMD) was a family of storage devices (hard disk drives) first shipped by Control Data Corporation in December 1973 as the 9762 80 MByte (unformatted) storage module disk drive. A 40 MByte (unformatted) varient, the 9760 drive was also in the initial announcement. The family included both removable and fixed disk drives. It's interface, derived from the earlier Digital RP-0x interface, became a standard in the late 1970's. It was primarily used on 8" and 14" disk drives used with mainframes and minicomputers and was later itself replaced by SCSI.
Manufacturers who supplied SMD drives included IBM, CDC, Fujitsu and Pertec.