一、目的
在使用CentOS6.3版本Linux系统的时候，发现根目录(/)的空间不是很充足，而其他目录空间有很大的空闲，所以本文主要是针对现在已有的空间进行调整。首先，先来查看一下系统的空间分配情况：
| [root@CentOS-78 /]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_centos-lv_root 50G 14G 34G 30% / tmpfs 1.9G 0 1.9G 0% /dev/shm /dev/sda1 485M 37M 423M 8% /boot /dev/mapper/vg_centos-lv_home 404G 670M 382G 1% /home |
下面的详细步骤部分将从vg_centos-lv_home分区下取出100G的空间添加到/vg_centos-lv_root分区上去。
二、详细步骤
1、卸载vg_centos-lv_home分区
| [root@CentOS-78 /]# umount /home |
此时在用df命令查看将会发现/home目录已经看不见了，如下所示：
| [root@CentOS-78 /]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_centos-lv_root 50G 14G 34G 30% / tmpfs 1.9G 0 1.9G 0% /dev/shm /dev/sda1 485M 37M 423M 8% /boot |
2、从新设定vg_home-lv_home的大小
| [root@CentOS-78 /]# resize2fs -p /dev/mapper/vg_centos-lv_home 282G resize2fs 1.41.12 (17-May-2010) Please run 'e2fsck -f /dev/mapper/vg_centos-lv_home' first. |
这一步设定vg_home-lv_home大小没有成功，系统提示我们先运行下面的命令，操作如下：
| [root@CentOS-78 /]# e2fsck -f /dev/mapper/vg_centos-lv_home e2fsck 1.41.12 (17-May-2010) Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information /dev/mapper/vg_centos-lv_home: 1386/26836992 files (0.9% non-contiguous), 1855856/107344896 blocks |
从新设定vg_home-lv_home的大小：
| [root@CentOS-78 /]# resize2fs -p /dev/mapper/vg_centos-lv_home 282G resize2fs 1.41.12 (17-May-2010) Resizing the filesystem on /dev/mapper/vg_centos-lv_home to 73924608 (4k) blocks. Begin pass 2 (max = 43) Relocating blocks XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Begin pass 3 (max = 3276) Scanning inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Begin pass 4 (max = 266) Updating inode references XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX The filesystem on /dev/mapper/vg_centos-lv_home is now 73924608 blocks long. |
检查是否成功：
| [root@CentOS-78 /]# mount /home [root@CentOS-78 /]# [root@CentOS-78 /]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_centos-lv_root 50G 14G 34G 30% / tmpfs 1.9G 0 1.9G 0% /dev/shm /dev/sda1 485M 37M 423M 8% /boot /dev/mapper/vg_centos-lv_home 278G 663M 263G 1% /home [root@CentOS-78 /]# |
