Linux VPS下启用未使用的硬盘空间扩充LVM.docVIP

Linux VPS下启用未使用的硬盘空间扩充LVM SSH登陆后，查看现有分区、挂载及swap情况：可以看到大概8G的硬盘空间分布情况 df -hal free -m [root@XenSystem ~]# df -halFilesystem Size Used Avail Use% Mounted on/dev/mapper/VolGroup00-LogVol005.7G 1.1G 4.4G 20% /proc 0 0 0 - /procsysfs 0 0 0 - /sysdevpts 0 0 0 - /dev/pts/dev/xvda1 99M 27M 67M 29% /boottmpfs 257M 0 257M 0% /dev/shmnone 0 0 0 - /proc/sys/fs/binfmt_miscsunrpc 0 0 0 - /var/lib/nfs/rpc_pipefs[root@XenSystem~]# free -m? ?? ?? ?? ? total? ?? ? used? ?? ? free? ???shared? ? buffers? ???cachedMem:? ?? ?? ???512? ?? ???506? ?? ?? ? 5? ?? ?? ? 0? ?? ???447? ?? ?? ? 9-/+ buffers/cache:? ?? ?? ?49? ?? ???463Swap:? ?? ?? ?2079? ?? ?? ? 0? ?? ? 2079 查看硬盘设备列表： fdisk -l Disk /dev/xvdb: 23.6 GB, 23622320128 bytes255 heads, 63 sectors/track, 2871 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytesDisk /dev/xvdb doesnt contain a valid partition tableDisk /dev/xvda: 8589 MB, 8589934592 bytes255 heads, 63 sectors/track, 1044 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes? ? Device Boot? ?? ?Start? ?? ?? ?End? ?? ?Blocks? ?Id??System/dev/xvda1? ?*? ?? ?? ???1? ?? ?? ? 13? ?? ?104391? ?83??Linux/dev/xvda2? ?? ?? ?? ???14? ?? ???1044? ???8281507+??8e??Linux LVM 硬盘/dev/xvdb尚未划分使用，接下来我们为dev/xvdb分区 fdisk /dev/xvdb [root@XenSystem ~]# fdisk /dev/xvdbDevice contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabelBuilding a new DOS disklabel. Changes will remain in memory only,until you decide to write them. After that, of course, the previouscontent wont be recoverable.The number of cylinders for this disk is set to 2871.There is nothing wrong with that, but this is larger than 1024,and could in certain setups cause problems with:1) software that runs at boot time (e.g., old versions of LILO)2) booting and partitioning software from other OSs? ?(e.g., DOS FDISK, OS/2 FDISK)Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)#输入n，新建分区Command (m for help): n#输入P，主分区Command act