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Browse Prior Art Database

Multiple DOS Levels Per Fixed Disk

IP.com Disclosure Number: IPCOM000039754D
Original Publication Date: 1987-Jul-01
Included in the Prior Art Database: 2005-Feb-01

Publishing Venue

IBM

Related People

Authors:
Dachowski, RP May, DS Rourke, DJ [+details]

Abstract

In the past, only ONE level of DOS per fixed disk was possible. This restriction forced the DOS customer to allocate his ENTIRE fixed disk to ONE level of DOS. A method is described which allows the user to partition his fixed disk into a maximum of FOUR bootable DOS partitions. In the past, it was possible to allocate the storage of a fixed disk on an IBM personal computer (PC) system into 4 distinct, logical partitions. Although 4 partitions could be defined, ONLY 1 partition could be formatted as a DOS partition. As a result, there was no way to create a fixed disk with more than 1 bootable DOS level on it. This restriction forced the user to completely reformat his fixed disk if he desired to install the new level of DOS on it.