Linux磁盘分区--MBR分区

[root@linux-node2 ~]# fdisk /dev/sdb

Welcome to fdisk (util-linux 2.23.2).

Command (m for help): m        #查看帮助

Command action

   a   toggle a bootable flag

   b   edit bsd disklabel

   c   toggle the dos compatibility flag

   d   delete a partition

   g   create a new empty GPT partition table

   G   create an IRIX (SGI) partition table

   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): n                   #新建分区

Partition type:

   p   primary (0 primary, 0 extended, 4 free)     #主分区

   e   extended              #扩展分区

Select (default p): p           #选择新建主分区

Partition number (1-4, default 1): 1          #主分区表示，会生成/dev/sdb1

First sector (2048-6291455, default 2048):               #开始扇区，回车默认从2048

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-6291455, default 6291455): +100M

Partition 1 of type Linux and of size 100 MiB is set

Command (m for help): n          #新建分区

Partition type:

   p   primary (1 primary, 0 extended, 3 free)

   e   extended

Select (default p): e           #选择扩展分区

Partition number (2-4, default 2): 3          #扩展分区编号/dev/sdb3

First sector (206848-6291455, default 206848):              #默认回车，从当前扇区开始

Using default value 206848

Last sector, +sectors or +size{K,M,G} (206848-6291455, default 6291455): #默认回车分配所有剩余空间

Using default value 6291455

Partition 3 of type Extended and of size 2.9 GiB is set

 

Command (m for help): n

Partition type:

   p   primary (1 primary, 1 extended, 2 free)

   l   logical (numbered from 5)

Select (default p): l             #新建逻辑分区

Adding logical partition 5          #默认逻辑分区编号为5

First sector (208896-6291455, default 208896):     #逻辑分区起始位置

Using default value 208896

Last sector, +sectors or +size{K,M,G} (208896-6291455, default 6291455): +500M

Partition 5 of type Linux and of size 500 MiB is set

Command (m for help): n          #新建第二个逻辑分区，分配剩余空间

Partition type:

   p   primary (1 primary, 1 extended, 2 free)

   l   logical (numbered from 5)

Select (default p): l

Adding logical partition 6

First sector (1234944-6291455, default 1234944):

Using default value 1234944

Last sector, +sectors or +size{K,M,G} (1234944-6291455, default 6291455):

Using default value 6291455

Partition 6 of type Linux and of size 2.4 GiB is set

 

Command (m for help): w         保存退出

The partition table has been altered!

 

Calling ioctl() to re-read partition table.

Syncing disks.