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技术沙龙 | 邀您于8月25日与国美/AWS/转转三位专家共同探讨小程序电商实战
在esx server上安装虚拟机时,由于只分配了默认的8GB磁盘空间。空间不太够,所以在虚拟机上把分配磁盘空间扩大的20GB。在esx server上扩容磁盘空间的方法很简单,在此不提,下面具体说说如何把该扩容的磁盘空间在虚拟机上应用上去。

以下是未扩容前的状态:
- [root@localhost ~]# fdisk -l
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- Disk /dev/sda: 21.4 GB, 21474836480 bytes
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- 255 heads, 63 sectors/track, 2610 cylinders
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- Units = cylinders of 16065 * 512 = 8225280 bytes
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- Device Boot Start End Blocks Id System
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- /dev/sda1 * 1 13 104391 83 Linux
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- /dev/sda2 14 1044 8281507+ 8e Linux LVM
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-
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- [root@localhost ~]# df -h
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- Filesystem Size Used Avail Use% Mounted on
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- /dev/mapper/VolGroup-LogVol00
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- 7.0G 4.8G 1.8G 73% /
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- /dev/sda1 99M 12M 82M 13% /boot
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- tmpfs 187M 0 187M 0% /dev/shm
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- /dev/hdc 183M 183M 0 100% /media/VMware Tools
可以看到sda有21.4GB,但是只利用了sda1和sda2;根目录挂载在/dev/mapper/VolGroup-LogVol00,我们要做的是,把sda上剩余的空间扩容到/dev/mapper/VolGroup-LogVol00。
1)首先,通过fdisk /dev/sda命令将sda剩余空间创建一个分区:
- [root@localhost ~]# fdisk /dev/sda
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- The number of cylinders for this disk is set to 2610.
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- There is nothing wrong with that, but this is larger than 1024,
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- and could in certain setups cause problems with:
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- 1) software that runs at boot time (e.g., old versions of LILO)
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- 2) booting and partitioning software from other OSs
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- (e.g., DOS FDISK, OS/2 FDISK)
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- Command (m for help): m
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- Command action
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- a toggle a bootable flag
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- b edit bsd disklabel
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- c toggle the dos compatibility flag
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- d delete a partition
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- l list known partition types
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- m print this menu
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- n add a new partition
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- o create a new empty DOS partition table
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- p print the partition table
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- q quit without saving changes
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- s create a new empty Sun disklabel
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- t change a partition's system id
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- u change display/entry units
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- v verify the partition table
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- w write table to disk and exit
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- x extra functionality (experts only)
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- Command (m for help): n
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- Command action
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- e extended
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- p primary partition (1-4)
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- p
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- Partition number (1-4): 3
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- First cylinder (1045-2610, default 1045):
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- Using default value 1045
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- Last cylinder or +size or +sizeM or +sizeK (1045-2610, default 2610):
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- Using default value 2610
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- Command (m for help): w
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- The partition table has been altered!
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- Calling ioctl() to re-read partition table.
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- WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
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- The kernel still uses the old table.
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- The new table will be used at the next reboot.
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- Syncing disks.
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- [root@localhost ~]#
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