VM虚拟机中Linux扩展磁盘空间的方法 - 图文

Vm虚拟机下Linux扩展原有磁盘空间

1、 打开VMWare软件，展开需要扩展的linux服务器

如图所示，我们将扩展centos7_03，它的硬盘只有20GB

2、 点击“硬盘”，弹出框中再选择“实用工具”

在弹出菜单中，选择“扩展”

在弹出框中，输入最大磁盘大小，这里输入50GB，原来为20GB，即扩展30GB的硬盘空间。

确定之后，我们可以看到硬盘，容易确实变成50GB；但是30G新增加的空间还不能立即使用，需要重新分区和格式化。

需注意以下几点： linux只能扩展磁盘容量而不能减小，所填写的容量为总容量，即包含已分区的磁盘，扩展容量时不能有快照哟，大家可以先把快照删除掉。

3、 启动Linux，查看系统分区，并创建分区sda3，命令如下：红色字体命令，#后为注释 [root@localhost ~]# fdisk -l

Disk /dev/sda: 53.7 GB, 53687091200 bytes, 104857600 sectors Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: dos

Disk identifier: 0x0003fd36

Device Boot Start End Blocks Id System /dev/sda1 * 2048 1026047 512000 83 Linux

/dev/sda2 1026048 41943039 20458496 8e Linux LVM

Disk /dev/mapper/centos-root: 18.8 GB, 18756927488 bytes, 36634624 sectors Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk /dev/mapper/centos-swap: 2147 MB, 2147483648 bytes, 4194304 sectors Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes #我的电脑有2个分区-sda1 sda2 [root@localhost ~]# fdisk /dev/sda Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them. Be careful before using the write command.

Command (m for help): n Partition type:

p primary (2 primary, 0 extended, 2 free) e extended

Select (default p): p

Partition number (3,4, default 3): 3

First sector (41943040-104857599, default 41943040): #回车即可 Using default value 41943040

Last sector, +sectors or +size{K,M,G} (41943040-104857599, default 104857599): #回车即可 Using default value 104857599

Partition 3 of type Linux and of size 30 GiB is set

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy. The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8) Syncing disks.