CentOS 磁盘挂载（Linux磁盘挂载）
1、 查看新磁盘信息# fdisk -l
Disk /dev/xvda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 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: 0x00060953
Device Boot Start End Blocks IdSystem
/dev/xvda1 * 1 2611 20970496 83Linux
Disk /dev/xvdb: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 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: 0x00000000
2、硬盘分区
2.1、进入fdisk模式
# fdisk /dev/xvdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0xc233737d.
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').
2.2、输入n进行分区
Command (m for help): n
Command action
e extended
p primary partition (1-4)
2.3、选择分区类型，p为主分区，linux上主分区最多能有4个；e为扩展分区，扩展分区 linux上扩展分区只能有1个，扩展分区创建后不能直接使用，还要在扩展分区上创建逻辑分区。这里选择p
p
2.4、选择分区个数，最多可以分4个区，这里就只分一个了。
Partition number (1-4): 1
2.5、设置柱面，这里选择默认值就可以
First cylinder (1-2610, default 1):
Using default value 1
2.6、设置柱面，这里选择默认值就可以
Last cylinder, +cylinders or +size{K,M,G} (1-2610, default 2610):
Using default value 2610
2.7、输入w，写入分区表，进行分区
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
#
3、格式化分区
如果创建的是主分区
# mkfs -t ext3/dev/xvdb
4、挂载硬盘
4.1、创建挂载点
在根目录下创建storage目录
#mkdir /storage
4.2、将/dev/sdb1挂载到/storage下
#mount /dev/xvdb/storage
5、设置开机启动自动挂载
新创建的分区不能开机自动挂载，每次重启机器都要手动挂载。
设置开机自动挂载需要修改/etc/fstab文件
#vi /etc/fstab
在文件的最后增加一行
/dev/sdb5 /storage ext3 defaults 1 2
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