System for multiple access hard disk partitioning
US5136711A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1990 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Oct 17, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/441
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for integrating incompatible hard disk partitioning systems in a single hard disk drive provides a method for installing and operating multiple incompatible absolute zero sector operating systems on the same hard disk drive with a first operating system and its associated boot loader located at absolute physical sector zero and a second operating system and its associated boot loader located at an absolute physical sector other than zero. The system includes a second BIOS that automatically offsets physical addresses for disk requests from the second operating system so that correct absolute physical address of the disk is accessed. This facilitates the use of a single hard disk drive in dual-compatible computers which functions selectively in an IBM AT compatible mode and a non-IBM AT compatible mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.