Partition (non removable disk)

this article exclusively refers to partitions of MBR data media, which are used in computers with BIOS (comparisons: GPT data medium).

Partitionierung is the partitioning of a data medium into different logical ranges. So for example several operating systems can on a non removable diskare installed, although different file systems are used.

Alternatively to the Partitionierung there is the more flexible Logical volume management table of contents 1 use



the definition thatPartitions is made by appropriate software in the partition table of the MBR of the data medium. The information about start, end, type and boat ability of the partitions is only noted.

In the MBR maximally four partitions can be registered. In order to go around this restriction, can of it an extended partition its. An extended partition serves as framework for as many as desired so-called. logical partitions (logical drive assemblies). In modern operating systems primary and logical partitions are essentially identically treated.

Around a MBR data medium as boatable data medium use toocan, at least a primary partition must be furnished.

The following reasons speak several partitions for the use:

  • several operating systems: Partitions make it possible to install and if necessary between them to change be able several operating systems on a non removable disk.
  • File systems:There each partitiontheir own file system possesses, can separate one by Partitionierung different file systems.
  • Organization: One can store its data the purpose after in different partitions. So can the data of the system, which are application programs and the user data on different drive assemblies, which for example Data safety devices facilitates.
  • Data security: If the file system of a partition should exhibit errors, then the other partitions are not affected by it.


due to technical or human errors can be lost to data irrevocablly. It is in any case advisable, before thatTo secure Partitionieren its data on external storage media.

access and use

under DOS and Windows become partitions, and/or. logical drive assemblies (logical partitions) fundamental drive assembly letters assigned. With MS-DOS and Windows 9x only a primary partition can per non removable diskand an extended partition to be furnished and addressed. By the use of drive assembly letters maximally 24 partitions and logical drive assemblies are accessible ((latin) the alphabet has 26 letters, the drive assembly designators A: and B: are firmly reserved for floppy disk drives). The restriction upa primary partition for each non removable disk does not apply to Windows NT.

Under NT-based Windows versions (starting from version 5.0) hang up a partition in a listing of another partition can do in use of NTFS without drive assembly letters and.

Under Unix and the likeOperating systems partitions are hung up into the listing tree (gemountet). Under Linux the first primary partition on a ATA is called - non removable disk /dev/hdx1, second primary /dev/hdx2 etc. For SCSI - For non removable disks applies similarly to /dev/sdx. Logical drive assemblies catch with /dev/hdx5 on.

x stands with the master non removable disk at the first IDE bus for A, with the Slave non removable disk for b. C would be now the master DEVICE of the second IDE bus etc.

SCSI non removable disks are simply counted over against it. The first available plate is addressed over sda.This happens independently of their ID or the used CONTROLLER.


it gives a set of programs, which facilitate the Partitionieren. Also simple console and DOS programs as fdisk make a Partitionierung possible. Although the instruction under DOS andLinux fdisk is called, does not concern it not the same program.

Also the installation programs of the operating systems such as z. B. YaST2 for SuSE Linux offer Partitioniermöglichkeiten, in order to accommodate the new operating system beside an operating system on the non removable disk, already installed. Thisis usually however only front-end for another program (e.g. fdisk/parted in case of of YaST2).

  • DOS
    • Fdisk instruction (fdisk/? assistance spends)
  • Windows
    • Fdisk instruction
    • non removable disk manager
    • data media administration
    • partition Magic
    • Paragon partition manager
    • Acronis disk Director Suite
  • GNU/Linux
    • fdisk, sfdisk,cfdisk
    • parted, gparted, qtparted offer a more comfortable surface around at the same time the size of a partition and the file system based on it to change.
  • Mac OS X
    • disk utility (integrated into the system)
    • iPartition of Coriolis of system
    • consoles program pdisk (into the systemintegrated)
    • consoles program fdisk for DOS partitions (integrated into the system)
  • ZETA 1,0 (BeOS successor)
    • Paragon Partitioning Tool (integrated in the Installer, NTFS and FAT can make partitions smaller)

particularly for Unix and Mac OS X there are a rowof Tools, in order to provide and administer file systems. See university X-commands.

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