一、过程步骤：
1、首先是添加新硬盘，本人是在虚拟机下添加的：VM >>Settings >> Hardware >> Add >> Hard Disk >> 一路默认。。。
2、fdisk -l //查看是否找到新硬盘，查看硬盘代号。
3、fdisk /dev/sdb //找到代号为sdb的新硬盘（创建分区sdb1）
4、mkfs.ext4 /dev/sdb1 //把新硬盘格式化成ext4文件系统
5、mkdir disk2 //创建新的挂载点（一般cd到/mnt目录下进行创建）
6、mount /dev/sdb1 /disk2 //手动挂载分区，把硬盘挂到/disk2目录下
7、vi /etc/fstab 进入编辑模式，添加 /dev/sdb1 /disk2 ext4 auto 1 2 //设置为开机自动挂载分区
二.详细过程
2、 查看硬盘代号 [root@AMD-LINUX ~]# fdisk -l Disk /dev/sda: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0×0007d856 Device Boot Start End Blocks Id System /dev/sda1 * 1 25 200781 83 Linux /dev/sda2 26 1305 10281600 8e Linux LVM Disk /dev/sdb: 2147 MB, 2147483648 bytes <=新硬盘 255 heads, 63 sectors/track, 261 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0×00000000 Disk /dev/sdb doesn’t contain a valid partition table Disk /dev/dm-0: 9395 MB, 9395240960 bytes 255 heads, 63 sectors/track, 1142 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0×00000000 Disk /dev/dm-0 doesn’t contain a valid partition table Disk /dev/dm-1: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0×30307800 Disk /dev/dm-1 doesn’t contain a valid partition table 3、fdisk 分区 [root@AMD-LINUX ~]# fdisk /dev/sdb Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel with disk identifier 0×623223a1. 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 0×0000 of partition table 4 will be corrected by w(rite) Command (m for help): p <=显示信息 Disk /dev/sdb: 2147 MB, 2147483648 bytes 255 heads, 63 sectors/track, 261 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0×623223a1 Device Boot Start End Blocks Id System Command (m for help): n <=新建分区 Command action e extended p primary partition (1-4)p <=新建主分区 Partition number (1-4): 1 <=分区号为1，即/dev/sdb1 First cylinder (1-261, default 1): Using default value 1 Last cylinder or +size or +sizeM or +sizeK (1-261, default 261): Using default value 261（输入给定范围的最大值，即把全部全部空间给该分区） Command (m for help): p <=显示分区信息 Disk /dev/sdb: 2147 MB, 2147483648 bytes 255 heads, 63 sectors/track, 261 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0×623223a1 Device Boot Start End Blocks Id System /dev/sdb1 1 261 2096451 83 Linux Command (m for help): w <=保存退出 The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. 4、创建挂载点 [root@AMD-LINUX ~]# mkdir /disk2 [root@AMD-LINUX ~]# fdisk -l Disk /dev/sda: 10.7 GB, 10737418240 bytes 255 heads, 63 sectors/track, 1305 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0×0007d856 Device Boot Start End Blocks Id System /dev/sda1 * 1 25 200781 83 Linux /dev/sda2 26 1305 10281600 8e Linux LVM Disk /dev/sdb: 2147 MB, 2147483648 bytes 255 heads, 63 sectors/track, 261 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0×623223a1 Device Boot Start End Blocks Id System /dev/sdb1 1 261 2096451 83 Linux Disk /dev/dm-0: 9395 MB, 9395240960 bytes 255 heads, 63 sectors/track, 1142 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0×00000000 Disk /dev/dm-0 doesn’t contain a valid partition table Disk /dev/dm-1: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0×30307800 Disk /dev/dm-1 doesn’t contain a valid partition table [root@AMD-LINUX ~]# mkfs.ext4 /dev/sdb1 => //把新硬盘格式化成ext4文件系统 mke2fs 1.40.2 (12-Jul-2007) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) 262144 inodes, 524112 blocks 26205 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=536870912 16 block groups 32768 blocks per group, 32768 fragments per group 16384 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912 Writing inode tables: done Creating journal (8192 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 36 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. 5、设置为开机自动挂载分区 [root@AMD-LINUX ~]# vi /etc/fstab /dev/sdb1 /disk2 ext3 auto 1 2 6、手动挂载分区 [root@AMD-LINUX ~]# mount /dev/sdb1 /disk2/