1、# fdisk -l
查看当前磁盘信息,就会发现最下面显示新加入的硬盘不是有效分区,如下:
1 2 3 4 5 6 7 8 | [root@localhost /] # fdisk -l Disk /dev/xvdb : 429.5 GB, 429496729600 bytes 255 heads, 63 sectors /track , 52216 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、# fdisk /dev/xvdb
对新硬盘分区,并根据提示进一步操作:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | [root@localhost /]# 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 0x7f095069. 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): n 输入n进行分区 Command action e extended p primary partition (1-4) p 输入p为主分区,e为逻辑分区 Partition number (1-4): 1 (由于是新盘我们输入1来分第一个主分区,共可以分4个主分区) First cylinder (1-52216, default 1): 1 (选择该分区的起始磁盘数,如无特殊需求强烈建议选择默认,也就是1来分区(可直接按回车)) Last cylinder or +size or +sizeM or +sizeK (1-52216, default 52216): 定义该分区的大小,如果按默认(按回车)即是使用全部可用存储额,如分一个1G的空间,输入+1024m Using default value 52216 Command (m for help): w 写入分区 The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. |
3、# fdisk -l
可以找到我们刚才分的一个分区,内容如下:
1 2 3 4 5 6 7 8 9 10 11 12 | | [root@localhost /]# fdisk -l Disk /dev/xvdb: 429.5 GB, 429496729600 bytes 255 heads, 63 sectors /track , 52216 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: 0x90b7ee49 Device Boot Start End Blocks Id System /dev/xvdb1 1 52216 419424988+ 83 Linux | |
4、# mkfs -t ext4 -c /dev/xvdb1
对分区使用ext3格式化,-c参数要先检测磁盘坏道

5、# mkdir /data2
新建挂载目录

6、# mount -t ext4 /dev/xvdb1 /data2
挂载新硬盘

7、# df -l
查看分区大小是否和我们预定的一样

8、最后也是很容易漏掉的一步

1 | [root@localhost /] # echo "/dev/xvdb1 /data2 ext4 defaults 0 0" >> /etc/fstab |
如果忘了将这个写入配置文件的话,服务器如果重启,硬盘将不会自动挂载,将找不到挂载的文件夹。
这时候要再一直mount 挂载一遍。。。