Opcje wyszukiwania podręcznika man:
Lista stron man zaczynających się od znaku:
A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z   ALPHA   NUM   OTHER   ALL
FDISK(8)                     System Administration                    FDISK(8)

       fdisk - manipulate disk partition table

       fdisk [options] device

       fdisk -l [device...]

       fdisk  is a dialog-driven program for creation and manipulation of par-
       tition tables.  It understands GPT, MBR, Sun,  SGI  and  BSD  partition

       Block devices can be divided into one or more logical disks called par-
       titions.  This division is recorded in  the  partition  table,  usually
       found in sector 0 of the disk.  (In the BSD world one talks about `disk
       slices' and a `disklabel'.)

       All partitioning is driven by  device  I/O  limits  (the  topology)  by
       default.   fdisk  is  able  to optimize the disk layout for a 4K-sector
       size and use an alignment offset on modern devices for MBR and GPT.  It
       is  always a good idea to follow fdisk's defaults as the default values
       (e.g. first and last partition sectors) and partition  sizes  specified
       by  the  +<size>{M,G,...}  notation are always aligned according to the
       device properties.

       Note that partx(8) provides a rich interface for scripts to print  disk
       layouts,  fdisk  is mostly designed for humans.  Backward compatibility
       in the output of fdisk is not guaranteed.   The  input  (the  commands)
       should always be backward compatible.

       -b, --sector-size sectorsize
              Specify  the  sector  size  of  the disk.  Valid values are 512,
              1024, 2048, and 4096.  (Recent kernels  know  the  sector  size.
              Use  this option only on old kernels or to override the kernel's
              ideas.)  Since  util-linux-2.17,  fdisk  differentiates  between
              logical and physical sector size.  This option changes both sec-
              tor sizes to sectorsize.

       -c, --compatibility[=mode]
              Specify the compatibility mode, 'dos' or 'nondos'.  The  default
              is  non-DOS mode.  For backward compatibility, it is possible to
              use the option without the mode argument -- then the default  is
              used.   Note that the optional mode argument cannot be separated
              from the -c option by a space, the correct form is  for  example

       -h, --help
              Display a help text and exit.

       -L, --color[=when]
              Colorize  the output in interactive mode.  The optional argument
              when can be auto, never or always.  The default is auto.

       -l, --list
              List the partition tables for the  specified  devices  and  then
              exit.   If no devices are given, those mentioned in /proc/parti-
              tions (if that file exists) are used.

       -s, --getsz
              Print the size in 512-byte sectors of each given  block  device.
              This option is DEPRECATED in favour of blockdev(1).

       -t, --type type
              Enable  support  only  for disklabels of the specified type, and
              disable support for all other types.

       -u, --units[=unit]
              When listing partition tables, show sizes  in  'sectors'  or  in
              'cylinders'.   The  default  is  to  show sizes in sectors.  For
              backward compatibility, it is possible to use the option without
              the  unit  argument  -- then the default is used.  Note that the
              optional unit argument cannot be separated from the -u option by
              a space, the correct form is for example '-u=cylinders'.

       -C, --cylinders number
              Specify the number of cylinders of the disk.  I have no idea why
              anybody would want to do so.

       -H, --heads number
              Specify the number of heads of the disk.  (Not the physical num-
              ber, of course, but the number used for partition tables.)  Rea-
              sonable values are 255 and 16.

       -S, --sectors number
              Specify the number of sectors per track of the disk.   (Not  the
              physical  number,  of  course, but the number used for partition
              tables.) A reasonable value is 63.

       -V, --version
              Display version information and exit.

       The device is usually /dev/sda, /dev/sdb or so.  A device  name  refers
       to  the entire disk.  Old systems without libata (a library used inside
       the Linux kernel to support ATA host controllers and  devices)  make  a
       difference  between  IDE and SCSI disks.  In such cases the device name
       will be /dev/hd* (IDE) or /dev/sd* (SCSI).

       The partition is a device name followed by  a  partition  number.   For
       example, /dev/sda1 is the first partition on the first hard disk in the
       system.   See  also  Linux   kernel   documentation   (the   Documenta-
       tion/devices.txt file).

       The  "last sector" dialog accepts partition size specified by number of
       sectors or by +<size>{K,B,M,G,...} notation.

       If the size is prefixed by  '+' then it is interpreted as  relative  to
       the  partition first sector. In this case the size is expected in bytes
       and the number may be followed by the multiplicative suffixes KiB=1024,
       MiB=1024*1024,  and so on for GiB, TiB, PiB, EiB, ZiB and YiB. The "iB"
       is optional, e.g. "K" has the same meaning as "KiB".

       The relative sizes are always aligned according to device  I/O  limits.
       The +<size>{K,B,M,G,...} notation is recommended.

       For  backward  compatibility  fdisk  also accepts the suffixes KB=1000,
       MB=1000*1000, and so on for GB, TB, PB, EB, ZB and YB. These 10^N  suf-
       fixes are deprecated.

       GPT (GUID Partition Table)
              GPT  is  modern  standard for the layout of the partition table.
              GPT uses 64-bit logical block addresses,  checksums,  UUIDs  and
              names  for  partitions  and  an  unlimited  number of partitions
              (although the number of partitions is usually restricted to  128
              in many partitioning tools).

              Note  that  the  first sector is still reserved for a protective
              MBR in the GPT specification.  It prevents MBR-only partitioning
              tools from mis-recognizing and overwriting GPT disks.

              GPT  is  always  a  better choice than MBR, especially on modern
              hardware with a UEFI boot loader.

       DOS-type (MBR)
              A DOS-type partition table can describe an unlimited  number  of
              partitions.   In sector 0 there is room for the description of 4
              partitions (called `primary').  One of these may be an  extended
              partition;  this  is  a  box  holding  logical  partitions, with
              descriptors found in a linked list of  sectors,  each  preceding
              the  corresponding  logical partitions.  The four primary parti-
              tions, present or not, get numbers 1-4.  Logical partitions  are
              numbered starting from 5.

              In  a  DOS-type partition table the starting offset and the size
              of each partition is stored in two ways: as an  absolute  number
              of  sectors (given in 32 bits), and as a Cylinders/Heads/Sectors
              triple (given in  10+8+6  bits).   The  former  is  OK  --  with
              512-byte  sectors this will work up to 2 TB.  The latter has two
              problems.  First, these C/H/S fields can be filled only when the
              number  of  heads and the number of sectors per track are known.
              And second, even if we know what these numbers should be, the 24
              bits  that  are  available do not suffice.  DOS uses C/H/S only,
              Windows uses both, Linux never uses C/H/S.  The C/H/S addressing
              is  deprecated  and  may be unsupported in some later fdisk ver-

              Please, read the DOS-mode section  if  you  want  DOS-compatible
              partitions.   fdisk  does  not care about cylinder boundaries by

              A BSD/Sun disklabel can describe  8  partitions,  the  third  of
              which should be a `whole disk' partition.  Do not start a parti-
              tion that actually uses its first sector (like a swap partition)
              at cylinder 0, since that will destroy the disklabel.  Note that
              a BSD label is usually nested within a DOS partition.

              An IRIX/SGI disklabel can describe 16 partitions,  the  eleventh
              of which should be an entire `volume' partition, while the ninth
              should be labeled `volume header'.  The volume header will  also
              cover  the  partition  table,  i.e., it starts at block zero and
              extends by default over five cylinders.  The remaining space  in
              the  volume  header may be used by header directory entries.  No
              partitions may overlap with the  volume  header.   Also  do  not
              change  its  type  or make some filesystem on it, since you will
              lose the partition table.  Use this  type  of  label  only  when
              working  with Linux on IRIX/SGI machines or IRIX/SGI disks under

       A sync() and an ioctl(BLKRRPART) (rereading the  partition  table  from
       disk)  are  performed  before exiting when the partition table has been

DOS mode and DOS 6.x WARNING
       Note that all this is deprecated. You don't have to care  about  things
       like  geometry and cylinders on modern operating systems. If you really
       want DOS-compatible partitioning then you have to enable DOS  mode  and
       cylinder  units  by  using the '-c=dos -u=cylinders' fdisk command-line

       The DOS 6.x FORMAT command looks for some information in the first sec-
       tor  of  the data area of the partition, and treats this information as
       more reliable than the information in the partition table.  DOS  FORMAT
       expects  DOS  FDISK  to clear the first 512 bytes of the data area of a
       partition whenever a size change occurs.  DOS FORMAT will look at  this
       extra  information  even  if the /U flag is given -- we consider this a
       bug in DOS FORMAT and DOS FDISK.

       The bottom line is that if you use fdisk or cfdisk to change  the  size
       of  a  DOS  partition table entry, then you must also use dd(1) to zero
       the first 512 bytes of that partition before using DOS FORMAT to format
       the partition.  For example, if you were using fdisk to make a DOS par-
       tition table entry for /dev/sda1, then (after exiting fdisk and reboot-
       ing  Linux  so that the partition table information is valid) you would
       use the command "dd if=/dev/zero of=/dev/sda1 bs=512 count=1"  to  zero
       the first 512 bytes of the partition.

       fdisk  usually  obtains  the  disk geometry automatically.  This is not
       necessarily the physical disk geometry (indeed,  modern  disks  do  not
       really  have anything like a physical geometry, certainly not something
       that can be described in the simplistic Cylinders/Heads/Sectors  form),
       but it is the disk geometry that MS-DOS uses for the partition table.

       Usually all goes well by default, and there are no problems if Linux is
       the only system on the disk.  However, if the disk  has  to  be  shared
       with  other  operating systems, it is often a good idea to let an fdisk
       from another operating system make at least one partition.  When  Linux
       boots  it looks at the partition table, and tries to deduce what (fake)
       geometry is required for good cooperation with other systems.

       Whenever a partition table is printed out in DOS  mode,  a  consistency
       check is performed on the partition table entries.  This check verifies
       that the physical and logical start and end points are  identical,  and
       that  each partition starts and ends on a cylinder boundary (except for
       the first partition).

       Some versions of MS-DOS create a first partition which does  not  begin
       on  a cylinder boundary, but on sector 2 of the first cylinder.  Parti-
       tions beginning in cylinder 1 cannot begin on a cylinder boundary,  but
       this  is  unlikely  to  cause  difficulty  unless you have OS/2 on your

       For best results, you should always use an OS-specific partition  table
       program.   For  example,  you  should  make DOS partitions with the DOS
       FDISK program and Linux partitions with the Linux fdisk or Linux cfdisk

       Implicit  coloring  can be disabled by an empty file /etc/terminal-col-

       See terminal-colors.d(5) for more details about colorization configura-
       tion. The logical color names supported by fdisk are:

       header The header of the output tables.

              The help section titles.

       warn   The warning messages.

              The welcome message.

       Karel Zak <>
       Davidlohr Bueso <>

       The  original version was written by Andries E. Brouwer, A. V. Le Blanc
       and others.

       Setting LIBFDISK_DEBUG=0xffff enables debug output.

       cfdisk(8), sfdisk(8), mkfs(8), partx(8)

       The fdisk command is part of the util-linux package  and  is  available

util-linux                      September 2013                        FDISK(8)

Czas wygenerowania: 0.00016 sek.

Created with the man page lookup class by Andrew Collington.
Based on a C man page viewer by Vadim Pavlov
Unicode soft-hyphen fix (as used by RedHat) by Dan Edwards
Some optimisations by Eli Argon
Caching idea and code contribution by James Richardson

Copyright © 2003-2023
Hosted by Hosting