[root@appserver ~]# df -h /*查看现有分区情况*/

文件系统 容量 已用 可用 已用%% 挂载点

/dev/vda1 9.9G 8.2G 1.2G 88% /

tmpfs 3.9G 100K 3.9G 1% /dev/shm

/dev/sr0 368K 368K 0 100% /media/CDROM

[root@appserver ~]# fdisk -l /*查看现有DISK*/

Disk /dev/vda: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 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: 0x0003e85f

Device Boot Start End Blocks Id System

/dev/vda1 * 1 1306 10484736 83 Linux

Disk /dev/vdb: 214.7 GB, 214748364800 bytes

16 heads, 63 sectors/track, 416101 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

[root@appserver ~]# fdisk /dev/vdb /*用fdisk分区工具对磁盘分区*/

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel

Building a new DOS disklabel with disk identifier 0x264c68f0.

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

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

Command action

e extended

p primary partition (1-4)

e

Partition number (1-4): 1

First cylinder (1-416101, default 1):

Using default value 1

Last cylinder, +cylinders or +size{K,M,G} (1-416101, default 416101):

Using default value 416101

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

[root@appserver ~]# fdisk -l

Disk /dev/vda: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 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: 0x0003e85f

Device Boot Start End Blocks Id System

/dev/vda1 * 1 1306 10484736 83 Linux

Disk /dev/vdb: 214.7 GB, 214748364800 bytes

16 heads, 63 sectors/track, 416101 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: 0x264c68f0

Device Boot Start End Blocks Id System

/dev/vdb1 1 416101 209714872+ 5 Extended

本篇文章来源于 Linux公社网站(www.linuxidc.com) 原文链接：http://www.linuxidc.com/Linux/2012-12/76839.htm