虚拟机CentOS系统硬盘扩容

装好CentOS后,发现空间太小,怎样才能增加硬盘容量?那就是再建一个硬盘:

打开虚拟经济的设置添加硬盘

虚拟机CentOS系统硬盘扩容

查看现有的磁盘空间

fdisk -l

[root@localhost ~]# fdisk -l

Disk /dev/sda: 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: 0x000e4bd8

Device Boot      Start        End      Blocks  Id  System
/dev/sda1  *          1          64      512000  83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              64        2611    20458496  8e  Linux LVM

Disk /dev/sdb: 5368 MB, 5368709120 bytes
255 heads, 63 sectors/track, 652 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

我添加的是/dev/sdb

给新加的硬盘进行分区

fdisk /dev/sdb

输入m ,可以查看帮助信息

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):

增加新的分区

command (m for help):n

选择基本信息分区,输入:p

Command (m for help): n
Command action
  e  extended
  p  primary partition (1-4)

回车

First cylinder (1-15908,default 1):Enter
(这是回车是指分的默认大小)
    写入并退出
        command (m for help):w

然后格式化磁盘分区
 用ext4格式对/dev/sdb1进入格式化

mkfs.ext4 /dev/sdb1

[root@localhost ~]# mkfs.ext4 /dev/sdb
mke2fs 1.41.12 (17-May-2010)
/dev/sdb is entire device, not just one partition!
无论如何也要继续? (y,n) y
/dev/sdb 已经挂载;will not make a 文件系统 here!
[root@localhost ~]#

因为我的扩展盘符已经挂上去了,在占用状态。

挂载分区

先创建一个挂载点

mkdir  /work

mount -t ext4 /dev/sdb1/work

查看挂载状态

df -h

[root@localhost ~]# df -h
Filesystem                    Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root  18G  11G  6.2G  63% /
tmpfs                        932M  72K  932M  1% /dev/shm
/dev/sda1                    485M  40M  421M  9% /boot
/dev/sdb                      5.0G  138M  4.6G  3% /work
[root@localhost ~]#

将挂载的目录加入开机自动挂载

/dev/sdb1 /work ext4 errors=remount-ro 0 1

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