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| Made by | Digital Equipment Corporation |
| Year | 1976 |
| Size | 18 inch |
| Capacity | 2,5 MB |
| Speed | 102.000 Words/s (1 Word = 16 bit) |
| Revolutions per Minute | 1500 |
| Interface | SCSI1 |
| Platter | 1 |
| Heads | 2 |
| Cost (1976) | incl. controller 7900$, 74$ per month maintenance charges |
This exhibit is a removable hard disk media with an iron oxide layer as a disk, which was mainly used together with a PDP-8 computer (the first commercially successful minicomputer in the 60s) on a RK8E board. It has a diameter of 14 inches and weighs 110 pounds.
The read and write heads lay down on the disk when the disk was turned off. In addition, a battery was installed so that this happens even if there is a power outage.