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A partition is a fixed-size subset of a disk drive which is treated as a unit by the operating system. A partition table is a table maintained on disk by the operating system describing the partitions on that disk. The terms partition table and partition map are most commonly associated with the MBR partition table of a Master Boot Record (MBR) in IBM PC compatibles, but it may be used generically to refer to other "formats" that divide a disk drive into partitions, such as: GUID Partition Table (GPT), Apple partition map (APM), or BSD disklabel.
Partitions can be created, resized, or deleted. This is called disk partitioning. It is usually done during the installation of an operating system, however it is sometimes possible to make changes to the partitions even after the operating system has been installed.
- Master Boot Record (MBR)
- Extended Boot Record (EBR)
- GUID Partition Table (GPT)
- Boot Engineering Extension Record (BEER)
- Apple Partition Map (APM)
- Rigid Disk Block (RDB)
- BSD disklabel
- Disk partitioning
- Frisch, AEleen (2002). Essential System Administration: Tools and Techniques for Linux and Unix Administration. O'Reilly Media, Inc.
- The pdisk utility for Apple Partition Maps is described as an Apple partition table editor in its man page .
- The Solaris documentation on disklabels  uses the term "partition table".
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