fdisk磁盘分区命令
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man fdisk查看技术文档：fdisk - Partition table manipulator for Linux 分区命令
常用选项：
-l [设备名称]:有设备名称时会列出分区的内容，若无则列出整个文件系统的所有分区列出
[[email protected] ~]# fdisk -l
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000d7449
Device Boot Start End Blocks Id System
/dev/sda1 * 1 26 204800 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 26 1301 10240000 83 Linux
/dev/sda3 1301 1556 2048000 82 Linux swap / Solaris
/dev/sda4 1556 2611 8477696 5 Extended
/dev/sda5 1556 2611 8476672 83 Linux
Disk /dev/sdd: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
分区步骤，使用/dev/sdd
[[email protected] ~]# fdisk /dev/sdd
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xdcb315ff.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition 删除一个分区
l list known partition types
m print this menu
n add a new partition 新添一个分区
o create a new empty DOS partition table
p print the partition table 打印分区信息
q quit without saving changes 离开不保存
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 保存后离开
x extra functionality (experts only)
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p 添加主分区
Partition number (1-4): 1
First cylinder (1-130, default 1): 1
Last cylinder, +cylinders or +size{K,M,G} (1-130, default 130): 50
Command (m for help): p
Disk /dev/sdd: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xdcb315ff
Device Boot Start End Blocks Id System
/dev/sdd1 1 50 401593+ 83 Linux
Command (m for help): n
Command action
e extended
p primary partition (1-4)
e添加扩展分区
Partition number (1-4): 2
First cylinder (51-130, default 51):
Using default value 51
Last cylinder, +cylinders or +size{K,M,G} (51-130, default 130):
Using default value 130
Command (m for help): p
Disk /dev/sdd: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xdcb315ff
Device Boot Start End Blocks Id System
/dev/sdd1 1 50 401593+ 83 Linux
/dev/sdd2 51 130 642600 5 Extended
Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
l 添加逻辑分区
First cylinder (51-130, default 51):
Using default value 51
Last cylinder, +cylinders or +size{K,M,G} (51-130, default 130): 80
Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
l继续添加逻辑分区
First cylinder (81-130, default 81):
Using default value 81
Last cylinder, +cylinders or +size{K,M,G} (81-130, default 130):
Using default value 130
Command (m for help): p
Disk /dev/sdd: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xdcb315ff
Device Boot Start End Blocks Id System
/dev/sdd1 1 50 401593+ 83 Linux
/dev/sdd2 51 130 642600 5 Extended
/dev/sdd5 51 80 240943+ 83 Linux
/dev/sdd6 81 130 401593+ 83 Linux
Command (m for help): w 保存分区信息退出
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
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