对于学习磁盘分区，通常学习的都是fdisk命令当然，对于小于2TB的磁盘，我们基本上是使用fdisk命令进行分区接下来是小编为大家收集的linux系统fdisk磁盘分区，欢迎大家阅读：

linux系统fdisk磁盘分区

fdisk -l 查看所有磁盘信息

fdisk /dev/sdb 使用fdisk命令工具操作/dev/sdb磁盘

m 显示所有的命令信息、用法

p 显示分区信息

q 退出

w 保存分区信息，只有执行了w命令后才会把分区信息写入到磁盘

d 1 删除磁盘的第一个分区

场景模拟

有一个1G的磁盘/dev/sdb

分区为一个主分区，一个扩展分区，大小都为200M

其中在扩展分区上面建立一个100M的逻辑分区 /dev/sdb5

格式化文件系统为 mkfs.ext4

实现开机自动挂载到目录 /backup3

1 使用fdisk命令工具操作磁盘/dev/sdb

fdisk /dev/sdb

2 创建一个主分区

Command (m for help): n

Command action

e extended

p primary partition (1-4)

p

Partition number (1-4): 1

Using default value 1

Last cylinder, +cylinders or +size{K,M,G} (1-130, default 130): +400M

Command (m for help): p

Disk /dev/sdb: 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: 0x0004a98a

Device Boot Start End Blocks Id System

/dev/sdb1 1 52 417658+ 83 Linux

3 创建一个扩展分区

Command (m for help): n

Command action

e extended

p primary partition (1-4)

e

Partition number (1-4): 2

First cylinder (53-130, default 53):

Using default value 53

Last cylinder, +cylinders or +size{K,M,G} (53-130, default 130): +400M

Command (m for help): p

Disk /dev/sdb: 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: 0x0004a98a

Device Boot Start End Blocks Id System

/dev/sdb1 1 52 417658+ 83 Linux

/dev/sdb2 53 104 417690 5 Extended

4 创建一个逻辑分区

Command (m for help): n

Command action

l logical (5 or over)

p primary partition (1-4)

l

First cylinder (53-104, default 53):

Using default value 53

Last cylinder, +cylinders or +size{K,M,G} (53-104, default 104): +100M

Command (m for help): p

Disk /dev/sdb: 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: 0x0004a98a

Device Boot Start End Blocks Id System

/dev/sdb1 1 52 417658+ 83 Linux

/dev/sdb2 53 104 417690 5 Extended

/dev/sdb5 53 66 112423+ 83 Linux

5 保存

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

6 对磁盘进行分区

[root@hsj2 ~]# mkfs.ext4 /dev/sdb1

mke2fs 1.41.12 (17-May-2010)

Filesystem label=

OS type: Linux

Block size=1024 (log=0)

Fragment size=1024 (log=0)

Stride=0 blocks, Stripe width=0 blocks

104448 inodes, 417656 blocks

20882 blocks (5.00%) reserved for the super user

First data block=1

Maximum filesystem blocks=67633152

51 block groups

8192 blocks per group, 8192 fragments per group

2048 inodes per group

Superblock backups stored on blocks:

8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409

Writing inode tables: done

Creating journal (8192 blocks): done

Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 31 mounts or

180 days, whichever comes first. Use tune2fs -c or -i to override.

[root@hsj2 ~]# mkfs.ext4 /dev/sdb5

mke2fs 1.41.12 (17-May-2010)

Filesystem label=

OS type: Linux

Block size=1024 (log=0)

Fragment size=1024 (log=0)

Stride=0 blocks, Stripe width=0 blocks

28112 inodes, 112420 blocks

5621 blocks (5.00%) reserved for the super user

First data block=1

Maximum filesystem blocks=67371008

14 block groups

8192 blocks per group, 8192 fragments per group

2008 inodes per group

Superblock backups stored on blocks:

8193, 24577, 40961, 57345, 73729

Writing inode tables: done

Creating journal (4096 blocks): done

Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 31 mounts or

180 days, whichever comes first. Use tune2fs -c or -i to override.

ok，搞定

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