fdisk

Source: Wikipedia, the free encyclopedia.
fdisk
TypeCommand
LicenseMS-DOS, PC DOS, FlexOS, OS/2, Windows, DR DOS, ROM-DOS, PTS-DOS: Proprietary commercial software
FreeDOS:
GNU GPLv2

fdisk is a

command-line utility for disk partitioning. It has been part of DOS, DR FlexOS, IBM OS/2, and early versions of Microsoft Windows, as well as certain ports of FreeBSD,[2] NetBSD,[3] OpenBSD,[4] DragonFly BSD[5] and macOS[6] for compatibility reasons. Windows 2000 and its successors have replaced fdisk with a more advanced tool called diskpart
.

Implementations

DOS

active partition, or display partition data. fdisk writes the master boot record, which supports up to four partitions. The other three were intended for other operating systems such as CP/M-86 and Xenix
, which were expected to have their own partitioning utilities.

Microsoft first added fdisk to MS-DOS in version 3.2.[7] MS-DOS versions 2.0 through 3.10 included OEM-specific partitioning tools, which may have been named fdisk.

PC DOS 3.0, released in August 1984, added support for

FAT16B
was first added to Compaq's fdisk in MS-DOS 3.31. FAT16B later became available with MS-DOS and PC DOS 4.0.

The undocumented /mbr switch in fdisk, which could repair the master boot record, soon became popular.

IBM PC DOS 7.10 shipped with the new fdisk32 utility.

DR DOS 6.0[9] FlexOS,[10] PTS-DOS 2000 Pro,[11] and FreeDOS,[12]
include an implementation of the fdisk command.

Windows

Microsoft Windows 95

Disk Management
utilities.

Starting with Windows 95 OSR2, fdisk supports the

FAT32 file system.[13]

The version of fdisk that ships with Windows 95 does not report the correct size of a hard disk that is larger than 64 GB. An updated fdisk is available from Microsoft to correct this issue.[14] In addition, fdisk cannot create partitions larger than 512 GB, even though FAT32 supports partitions as big as 2 TB. This limitation applies to all versions of fdisk supplied with Windows 95 OSR 2.1, Windows 98 and Windows ME.

IBM OS/2

Before version 4.0,

graphical fdiskpm.[16] The two have identical functionality, and can manipulate both FAT partitions and the more advanced HPFS
partitions.

OS/2 4.5 and higher (including

JFS file system, as well as FAT and HPFS. They replaced fdisk with the Logical Volume Manager
(LVM).

Mach and 386BSD

fdisk for Mach Operating System was written by Robert Baron. It was ported to 386BSD by Julian Elischer,[17] and the implementation is being used by FreeBSD,[2] NetBSD[3] and DragonFly BSD,[5] all as of 2019, as well as the early versions of OpenBSD between 1995 and 1997 before OpenBSD 2.2.[1]

Tobias Weingartner re-wrote fdisk in 1997 before OpenBSD 2.2,

Apple Computer, Inc in 2002, and is still used as the basis for fdisk on macOS as of 2019.[6]

For native partitions, BSD systems traditionally use BSD disklabel, and fdisk partitioning is supported only on certain architectures (for compatibility reasons) and only in addition to the BSD disklabel (which is mandatory).

Linux

In Linux, fdisk is a part of a standard package distributed by the Linux Kernel organization, util-linux. The original program was written by Andries E. Brouwer and A. V. Le Blanc and was later rewritten by Karel Zak and Davidlohr Bueso when they forked the util-linux package in 2006. An alternative, ncurses-based program, cfdisk, allows users to create partition layouts via a text-based user interface (TUI).[18]

See also

References

  1. ^ a b "fdisk(8) — PC slice table (MBR) maintenance program". System Manager's Manual. FreeBSD, NetBSD, OpenBSD, DragonFly BSD.
  2. ^ a b "fdisk — PC slice table maintenance utility". BSD Cross Reference. FreeBSD.
  3. ^ a b "fdisk — MS-DOS partition maintenance program". BSD Cross Reference. NetBSD.
  4. ^ a b "fdisk — partition table maintenance program". BSD Cross Reference. OpenBSD.
  5. ^ a b "fdisk — PC slice table (MBR) maintenance program". BSD Cross Reference. DragonFly BSD.
  6. ^ a b "fdisk.tproj/fdisk.8", macOS 10.14.1, Apple
  7. ISBN 0-7356-1812-7
    .
  8. ^ "Datalight ROM-DOS User's Guide" (PDF). www.datalight.com.
  9. ^ DR DOS 6.0 User Guide Optimisation and Configuration Tips
  10. ^ http://www.bitsavers.org/pdf/digitalResearch/flexos/1073-2003_FlexOS_Users_Guide_V1.3_Nov86.pdf Archived 2019-09-25 at the Wayback Machine [bare URL PDF]
  11. Paragon Technology GmbH. 1999. Archived
    (PDF) from the original on 2018-05-12. Retrieved 2018-05-12.
  12. ^ "ibiblio.org FreeDOS Group -- FreeDOS Base". www.ibiblio.org. Retrieved 2020-06-03.
  13. ^ "How to Use the Fdisk and Format Tools to Partition or Repartition a Hard Disk". Support (6.0 ed.). Microsoft. 28 June 2012.
  14. ^ "Fdisk Does Not Recognize Full Size of Hard Disks Larger than 64 GB". Support (4.0 ed.). Microsoft. 24 August 2012.
  15. ^ "JaTomes Help - OS/2 Commands". Archived from the original on 2019-04-14. Retrieved 2019-06-20.
  16. ^ "JaTomes Help - OS/2 Commands". Archived from the original on 2019-04-14. Retrieved 2019-06-20.
  17. ^ "Fdisk".
  18. ^ Sharma, Deepesh (2021-02-22). "How to Create, Resize and Delete Linux Partitions With Cfdisk". MUO. Retrieved 2023-05-15.

Further reading

External links

Wikibooks has a book on the topic of: Guide to Windows Commands
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