列出系统磁盘
fdisk -l
有未使用磁盘/dev/xvdb
对改磁盘进行操作
fdisk /dev/xvdb
这时候出现可输入要对磁盘操作命令
Command (m for help):
输入m查看可选命令：
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition 删除分区
g create a new empty GPT partition table
G create an IRIX (SGI) partition table
l list known partition types 列出分区类型
m print this menu 帮助
n add a new partition 添加分区
o create a new empty DOS partition table
p print the partition table 显示当前分区列表
q quit without saving changes 取消退出
s create a new empty Sun disklabel
t change a partition‘s system id 修改某一个分区的系统id
u change display/entry units
v verify the partition table
w write table to disk and exit 保存退出
x extra functionality (experts only)
添加一个分区：
Command (m for help): n （输入n添加分区）
Command action
e extended
p primary partition (1-4)
p（输入p添加主分区）
Partition number (1-4): 1（输入1，指定第一块分区）
First cylinder (1-33436, default 1): （回车，使用默认值）
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-33436, default 33436): +10G（输入+10G，分区大小）
Command (m for help): p （列出分区）
Disk /dev/xvdb: 214.7 GB, 214748364800 bytes
224 heads, 56 sectors/track, 33436 cylinders
Units = cylinders of 12544 * 512 = 6422528 bytes
Device Boot Start End Blocks Id System
/dev/xvdb1 1 1558 9771775+ 83 Linux
删除分区：
Command (m for help): p
Disk /dev/xvdb: 214.7 GB, 214748364800 bytes
224 heads, 56 sectors/track, 33436 cylinders
Units = cylinders of 12544 * 512 = 6422528 bytes
Device Boot Start End Blocks Id System
/dev/xvdb1 1 1558 9771748 83 Linux
/dev/xvdb2 1559 3116 9771776 83 Linux
Command (m for help): d（删除分区）
Partition number (1-4): 1（删除第一个分区）
Command (m for help): p（查看分区）
Disk /dev/xvdb: 214.7 GB, 214748364800 bytes
224 heads, 56 sectors/track, 33436 cylinders
Units = cylinders of 12544 * 512 = 6422528 bytes
Device Boot Start End Blocks Id System
/dev/xvdb2 1559 3116 9771776 83 Linux
修改磁盘类型
Command (m for help): t（修改磁盘类型）
Selected partition 1（选择磁盘1）
Hex code (type L to list codes): L（查看可用类型）
0 Empty 1e Hidden W95 FAT1 80 Old Minix bf Solaris
1 FAT12 24 NEC DOS 81 Minix / old Lin c1 DRDOS/sec (FAT-
2 XENIX root 39 Plan 9 82 Linux swap / So c4 DRDOS/sec (FAT-
3 XENIX usr 3c PartitionMagic 83 Linux c6 DRDOS/sec (FAT-
4 FAT16 <32M 40 Venix 80286 84 OS/2 hidden C: c7 Syrinx
5 Extended 41 PPC PReP Boot 85 Linux extended da Non-FS data
6 FAT16 42 SFS 86 NTFS volume set db CP/M / CTOS / .
7 HPFS/NTFS 4d QNX4.x 87 NTFS volume set de Dell Utility
8 AIX 4e QNX4.x 2nd part 88 Linux plaintext df BootIt
9 AIX bootable 4f QNX4.x 3rd part 8e Linux LVM e1 DOS access
a OS/2 Boot Manag 50 OnTrack DM 93 Amoeba e3 DOS R/O
b W95 FAT32 51 OnTrack DM6 Aux 94 Amoeba BBT e4 SpeedStor
c W95 FAT32 (LBA) 52 CP/M 9f BSD/OS eb BeOS fs
e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi ee EFI GPT
f W95 Ext‘d (LBA) 54 OnTrackDM6 a5 FreeBSD ef EFI (FAT-12/16/
10 OPUS 55 EZ-Drive a6 OpenBSD f0 Linux/PA-RISC b
11 Hidden FAT12 56 Golden Bow a7 NeXTSTEP f1 SpeedStor
12 Compaq diagnost 5c Priam Edisk a8 Darwin UFS f4 SpeedStor
14 Hidden FAT16 <3 61 SpeedStor a9 NetBSD f2 DOS secondary
16 Hidden FAT16 63 GNU HURD or Sys ab Darwin boot fb VMware VMFS
17 Hidden HPFS/NTF 64 Novell Netware b7 BSDI fs fc VMware VMKCORE
18 AST SmartSleep 65 Novell Netware b8 BSDI swap fd Linux raid auto
1b Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid fe LANstep
1c Hidden W95 FAT3 75 PC/IX be Solaris boot ff BBT
Hex code (type L to list codes): 83（输入要修改类型）
最后操作完了要记得输入w命令保存操作
格式化磁盘
mkfs -t ext3 /dev/xvdb1
挂载磁盘
mkdir -p /data/dev/xvdb1
mount /dev/xvdb1 /data/dev/xvdb1
通过df命令可以查看当前系统磁盘挂载情况
取消挂载
umount /data/dev/xvdb1