fdisk 扩展硬盘

扩展/dev/vdb1

[root@VM_191_163_centos /]# df -h

 

新建些文件

[root@VM_191_163_centos opt]# echo 0000000 > test.txt
[root@VM_191_163_centos opt]# mkdir 11 22 33 44
[root@VM_191_163_centos opt]# echo 11111 > 11/11.txt
[root@VM_191_163_centos opt]# vim 11/11.txt

需要记住磁盘柱一致 /dev/vdb1    是这个 1

fdisk /dev/vdb  

Disk /dev/vdb: 107.4 GB, 107374182400 bytes
16 heads, 63 sectors/track, 208050 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Device Boot Start           End Blocks Id System
/dev/vdb1        1             100000 50399968+ 83 Linux
/dev/vdb2        100001     208050 54457200 83 Linux

删除 d   两个都删除分区比较少

n新建分区

Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1  之前是几分区 我的就是1
First cylinder (1-208050, default 1):   磁主好我的是第一个分区就写1 
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-208050, default 208050):  这需要扩展全部默认就好了 
Using default value 208050

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

Calling ioctl() to re-read partition table.
Syncing disks.

保存退出

 

调整分区

e2fsck -f /dev/vdb1 #检查分区信息

resize2fs /dev/vdb1 #调整分区大小

 

重新挂载分区

mount  /dev/vdb1 /opt

 

文件都在