partition disk mac for windows format type

It must reside within the first physical 8 GB of disk, else use 0Fh instead (see 0Fh, 85h, C5h, D5h) įAT16B with 65,536 or more sectors. As primary partition it must reside in first physical 32 MB of disk, or as logical drive anywhere on disk (else use 06h instead). This is a list of known master boot record partition types on IBM PC compatible computers:įAT12 as primary partition in first physical 32 MB of disk or as logical drive anywhere on disk (else use 06h instead) įAT16 with less than 65,536 sectors (32 MB). This type was specially reserved for individual use as part of the Alternative OS Development Partition Standard (AODPS) initiative since 2002. In particular temporary partition type assignments for local or experimental projects can utilize type 7Fh in order to avoid conflicts with already assigned types.

While the list is not officially maintained, new assignments should be coordinated.

Partitions with partition types unknown to the software should be treated as reserved but occupied disk storage space which should not be dealt with by the software, save for partition managers. So the table specifies which operating systems or disk-related products introduced an ID and what file system or special partition type they mapped it to. It is up to an operating system's boot loader or kernel how to interpret the value. Some of them also actively helped to maintain software dealing with partitions to work with the updated lists, indicated conflicts, devised additional detection methods and work-arounds for vendors, or engaged in coordinating new non-conflictive partition type assignments as well. Brouwer in the 1990s started to research partition types and published (and later synchronized) partition type lists in order to help document the industry de facto standard and thereby reduce the risk of further conflicts. Several industry experts including Hale Landis, Ralf D. This led to various conflicting assignments sometimes causing severe compatibility problems between certain products.

As Microsoft neither documented all partition types already assigned by them nor wanted to maintain foreign assignments, third parties started to simply assign partition types on their own behalf in a mostly uncoordinated trial-and-error manner. When the market of PC operating systems and disk tools grew and liberated, other vendors had a need to assign special partition types to their products as well. Lists of assigned partition types to be used in the partition table in the MBR were originally maintained by IBM and Microsoft internally.

Partition disk mac for windows format type