Linux磁盘管理

fdisk磁盘分区工具应用

 

[root@localhost etc]# fdisk -l  显示分区表信息

Disk /dev/hda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1         509     4088511   83  Linux
/dev/hda2             510         783     2200905   83  Linux
/dev/hda3             784        1044     2096482+  82  Linux swap

 

[root@localhost etc]# fdisk -s /dev/hda1  显示分区大小
4088511

 

[root@localhost etc]# fdisk /dev/hda  选择hda设备

The number of cylinders for this disk is set to 1044.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): m  显示fdisk命令信息
Command action
   a   toggle a bootable flag
   b   edit bsd disklabel
   c   toggle the dos compatibility flag
   d   delete a partition
   l   list known partition types
   m   print this menu  
   n   add a new partition
   o   create a new empty DOS partition table
   p   print the partition table
   q   quit without saving changes
   s   create a new empty Sun disklabel
   t   change a partition's system id
   u   change display/entry units
   v   verify the partition table
   w   write table to disk and exit
   x   extra functionality (experts only)

 

Command (m for help): p  显示/dev/hda设备信息

Disk /dev/hda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1         509     4088511   83  Linux
/dev/hda2             510         783     2200905   83  Linux
/dev/hda3             784        1044     2096482+  82  Linux swap

总容量Disk /dev/hda: 8589 MB

 

Command (m for help): d  删除分区
Partition number (1-4): 2  删除分区号

Command (m for help): p

Disk /dev/hda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1         509     4088511   83  Linux
/dev/hda3             784        1044     2096482+  82  Linux swap

 

Command (m for help): n  新建分区
Command action
   e   extended
   p   primary partition (1-4)
p 新建主分区
Partition number (1-4): 2 新建分区号
First cylinder (510-1044, default 510): 510
Last cylinder or +size or +sizeM or +sizeK (510-783, default 783): +1024M 新分区大小

Command (m for help): p

Disk /dev/hda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1         509     4088511   83  Linux
/dev/hda2             510         634     1004062+  83  Linux
/dev/hda3             784        1044     2096482+  82  Linux swap

 

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
e 新建扩张分区
Selected partition 4
First cylinder (635-1044, default 635): 635
Last cylinder or +size or +sizeM or +sizeK (635-783, default 783): 783
Using default value 783

Command (m for help): p

Disk /dev/hda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1         509     4088511   83  Linux
/dev/hda2             510         634     1004062+  83  Linux
/dev/hda3             784        1044     2096482+  82  Linux swap
/dev/hda4             635         783     1196842+   5  Extended

Partition table entries are not in disk order

 

Command (m for help): t 改变分区类型
Partition number (1-4): 2 选择改变分区
Hex code (type L to list codes): l 显示支持分区类型

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

 

Command (m for help): p
Disk /dev/hda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1         509     4088511   83  Linux
/dev/hda2             510         634     1004062+  83  Linux LVM
/dev/hda3             784        1044     2096482+  82  Linux swap
/dev/hda4             635         783     1196842+   5  Extended
Partition table entries are not in disk order

Command (m for help): q 不写入退出
Command (m for help): w 执行写入操作并退出
The  Partition table has been altered!

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