File Allocation Table: Difference between revisions

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A parallel development in MS-DOS / PC&nbsp;DOS which allowed an increase in the maximum possible FAT size was the introduction of multiple FAT partitions on a hard disk. To allow the use of more FAT partitions in a compatible way, a new partition type was introduced in PC&nbsp;DOS&nbsp;3.2 (1986), the ''[[Extended boot record|extended partition]]'' (EBR),<ref name="Duncan_1988_MS-DOS_Encyclopedia" /> which is a container for an additional partition called ''logical drive''. Since PC&nbsp;DOS&nbsp;3.3 (April 1987), there is another, optional extended partition containing the next ''logical drive'', and so on. The [[Master Boot Record|MBR]] of a hard disk can either define up to four primary partitions, or an extended partition in addition to up to three primary partitions.

=== <span id="FAT16BFAT15B"></span><span id="FAT16XFAT15X"></span>Final FAT16FAT15 ===

{{infobox file system

| name = FAT16BFAT15B

| developer = [[Compaq]], [[Digital Research]], [[IBM]], [[Microsoft]], [[Novell]]

| full_name = [[Design of the FAT file system#FAT16FAT15|1615-bit File Allocation Table]]<br />(with 32-bit sector entries)

| introduction_date = {{ubli

| 1987-11 ([[Compaq MS-DOS 3.31]])