RA71 disk drive

From Computer History Wiki
Jump to navigationJump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.


RA71
Manufacturer: DEC
Drive Controller(s): all SDI controllers
Capacity: 700 Mbytes (formatted)
Total Surfaces: 14 data, 1 servo
Number of Heads: 14 data,
1 servo


The RA71 disk drive is a Standard Disk Interconnect non-removable-media disk drive from DEC. Unlike almost all the other RA-series drives, it is a compact width - 5.25 inches wide. It has no internal power supply; it gets its power from the host system, or its SA7x enclosure.

Its capacity was 700 Mbytes (formatted). It was internally operated by a microprocessor.

Further reading

  • RA7x Disk Drive Service Manual (EK–ORA7X-SM) - not available online

External links