fdisk创建逻辑卷

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fdisk创建逻辑分区

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[root@localhost ~]# fdisk /dev/sdd 
Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x17a3940f.
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): e                          #选择逻辑分区
Partition number (1-4, default 1):             #分区编码，主分区及扩展分区编码为1-4,逻辑分区为5以后
First sector (2048-41943039, default 2048): 
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039): +2G  
Partition 1 of type Extended and of size 2 GiB is set

Command (m for help): n                        #在扩展分区中创建逻辑分区
Partition type:
   p   primary (0 primary, 1 extended, 3 free)
   l   logical (numbered from 5)
Select (default p): l                          #选择逻辑卷
Adding logical partition 5
First sector (4096-4196351, default 4096): 
Using default value 4096
Last sector, +sectors or +size{K,M,G} (4096-4196351, default 4196351): +1G
Partition 5 of type Linux and of size 1 GiB is set

Command (m for help): p

Disk /dev/sdd: 21.5 GB, 21474836480 bytes, 41943040 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
Disk label type: dos
Disk identifier: 0x17a3940f

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1            2048     4196351     2097152    5  Extended
/dev/sdd5            4096     2101247     1048576   83  Linux

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.   
[root@localhost ~]# mkfs.ext4 /dev/sdd5
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
65536 inodes, 262144 blocks
13107 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=268435456
8 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks: 
	32768, 98304, 163840, 229376

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done

[root@localhost ~]# mount /dev/sdd5 /root/sky