![]() ![]() This also reflected the idea that the MBR is meant to be operating system and file system independent. Since MS-DOS, PC DOS, OS/2 and Windows were never enabled to boot off them, the MBR format and boot code remained almost unchanged in functionality, except for in some third-party implementations, throughout the eras of DOS and OS/2 up to 1996.In 1996, support for (LBA) was introduced in Windows 95B and DOS 7.10 in order to support disks larger than 8 GB. ![]() Support for an, a special primary partition type used as a container to hold other partitions, was added with DOS 3.2, and nested logical drives inside an extended partition came with DOS 3.30. ![]() This did not change when was introduced as a new file system with DOS 3.0. The partition table supported up to four primary partitions, of which DOS could only use one. The original version of the MBR was written by David Litton of IBM in June 1982. Contents.Overview Support for partitioned media, and thereby the master boot record (MBR), was introduced with IBM 2.0 in March 1983 in order to support the 10 MB of the then-new, still using the file system. ![]()
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