Editing Fdisk


[[wikipedia:fdisk]] ([[1983]])


 fdisk
 fdisk: bad usage
 Try 'fdisk --help' for more information.

 fdisk -l


 fdisk -l /dev/sda
 Disk /dev/sda: 14.9 GiB, 15931539456 bytes, 31116288 sectors
 Units: sectors of 1 * 512 = 512 bytes
 Sector size (logical/physical): 512 bytes / 512 bytes
 I/O size (minimum/optimal): 512 bytes / 512 bytes
 Disklabel type: dos
 Disk identifier: 0x00000000
 
 Device     Boot Start      End  Sectors  Size Id Type
 /dev/sda1        8192 31116287 31108096 14.9G  c W95 FAT32 (LBA)

== Create two partitions ==
 Command (m for help): n
 Partition type
    p   primary (0 primary, 0 extended, 4 free)
   e   extended (container for logical partitions)
 Select (default p): p
 Partition number (1-4, default 1):
 First sector (2048-31116287, default 2048):
 Last sector, +sectors or +size{K,M,G,T,P} (2048-31116287, default 31116287): +64M
 
 Created a new partition 1 of type 'Linux' and of size 64 MiB.

 Command (m for help): n
 Partition type
   p   primary (1 primary, 0 extended, 3 free)
   e   extended (container for logical partitions)
 Select (default p): e
 Partition number (2-4, default 2):
 First sector (133120-31116287, default 133120):
 Last sector, +sectors or +size{K,M,G,T,P} (133120-31116287, default 31116287):
 
 Created a new partition 2 of type 'Extended' and of size 14.8 GiB.

Verify:
 Command (m for help): p
 Disk /dev/sda: 14.9 GiB, 15931539456 bytes, 31116288 sectors
 Units: sectors of 1 * 512 = 512 bytes
 Sector size (logical/physical): 512 bytes / 512 bytes
 I/O size (minimum/optimal): 512 bytes / 512 bytes
 Disklabel type: dos
 Disk identifier: 0x00000000
 
 Device     Boot  Start      End  Sectors  Size Id Type
 /dev/sda1         2048   133119   131072   64M 83 Linux
 /dev/sda2       133120 31116287 30983168 14.8G  5 Extended


== Change partition type ==
<pre>
Command (m for help): t
Partition number (1,2, default 2): 1
Hex code (type L to list all codes): L

 0  Empty           24  NEC DOS         81  Minix / old Lin bf  Solaris
 1  FAT12           27  Hidden NTFS Win 82  Linux swap / So c1  DRDOS/sec (FAT-
 2  XENIX root      39  Plan 9          83  Linux           c4  DRDOS/sec (FAT-
 3  XENIX usr       3c  PartitionMagic  84  OS/2 hidden or  c6  DRDOS/sec (FAT-
 4  FAT16 <32M      40  Venix 80286     85  Linux extended  c7  Syrinx
 5  Extended        41  PPC PReP Boot   86  NTFS volume set da  Non-FS data
 6  FAT16           42  SFS             87  NTFS volume set db  CP/M / CTOS / .
 7  HPFS/NTFS/exFAT 4d  QNX4.x          88  Linux plaintext de  Dell Utility
 8  AIX             4e  QNX4.x 2nd part 8e  Linux LVM       df  BootIt
 9  AIX bootable    4f  QNX4.x 3rd part 93  Amoeba          e1  DOS access
 a  OS/2 Boot Manag 50  OnTrack DM      94  Amoeba BBT      e3  DOS R/O
 b  W95 FAT32       51  OnTrack DM6 Aux 9f  BSD/OS          e4  SpeedStor
 c  W95 FAT32 (LBA) 52  CP/M            a0  IBM Thinkpad hi ea  Rufus alignment
 e  W95 FAT16 (LBA) 53  OnTrack DM6 Aux a5  FreeBSD         eb  BeOS fs
 f  W95 Ext'd (LBA) 54  OnTrackDM6      a6  OpenBSD         ee  GPT
10  OPUS            55  EZ-Drive        a7  NeXTSTEP        ef  EFI (FAT-12/16/
11  Hidden FAT12    56  Golden Bow      a8  Darwin UFS      f0  Linux/PA-RISC b
12  Compaq diagnost 5c  Priam Edisk     a9  NetBSD          f1  SpeedStor
14  Hidden FAT16 <3 61  SpeedStor       ab  Darwin boot     f4  SpeedStor
16  Hidden FAT16    63  GNU HURD or Sys af  HFS / HFS+      f2  DOS secondary
17  Hidden HPFS/NTF 64  Novell Netware  b7  BSDI fs         fb  VMware VMFS
18  AST SmartSleep  65  Novell Netware  b8  BSDI swap       fc  VMware VMKCORE
1b  Hidden W95 FAT3 70  DiskSecure Mult bb  Boot Wizard hid fd  Linux raid auto
1c  Hidden W95 FAT3 75  PC/IX           bc  Acronis FAT32 L fe  LANstep
1e  Hidden W95 FAT1 80  Old Minix       be  Solaris boot    ff  BBT
Hex code (type L to list all codes): b

Changed type of partition 'Linux' to 'W95 FAT32'.

Command (m for help): p
Disk /dev/sda: 14.9 GiB, 15931539456 bytes, 31116288 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000

Device     Boot  Start      End  Sectors  Size Id Type
/dev/sda1         2048   133119   131072   64M  b W95 FAT32
/dev/sda2       133120 31116287 30983168 14.8G  5 Extended
</pre>


== Writing changes ==
<pre>
Command (m for help): w

The partition table has been altered.
Failed to remove partition 1 from system: Device or resource busy
Failed to add partition 1 to system: Device or resource busy
Failed to add partition 2 to system: Device or resource busy

The kernel still uses the old partitions. The new table will be used at the next reboot.
Syncing disks.
</pre>


<pre>
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.
</pre>

== Related terms ==
* <code>[[pvresize]]</code>
* <code>[[lvextend]]</code>
* <code>[[virt-resize]]</code>
* <code>[[parted]]</code>
* <code>[[resize2fs]]</code>
* <code>[[blkid]]</code>

== See also ==
* [[gdisk]]
* {{fdisk}}
* {{Linux block devices}}
* [[LUN]] [[PV]]


[[Category:Linux]]