Winchester disk Word Origin noun Computers.
- a hard disk that is permanently mounted in its unit.
Origin of Winchester disk First recorded in 1970–75; originally an IBM code name; the designation for a device containing two such disks was 3030 (each disk containing 30 megabytes), the same as the model number of a well-known Winchester rifleAlso called. British Dictionary definitions for winchester disk Winchester disk noun
- a type of hard disk in which disks are permanently sealed, together with read-write heads, in an airtight container to keep dust out
Word Origin for Winchester disk C20: named after the 3030 Winchester rifle, as the original device would have had 3030 as its IBM number