linux调整分区大小
查看一下当前分区情况
|
1
2
3
4
5
6
7
8
|
[root@localhost ~]# df -hFilesystem Size Used Avail Use% Mounted on/dev/mapper/VolGroup-lv_root 50G 747M 46G 2% /
tmpfs 7.8G 0 7.8G 0% /dev/shm
/dev/sda1 485M 32M 429M 7% /boot
/dev/mapper/VolGroup-lv_home 163G 188M 155G 1% /home
|
我需要把VolGroup-lv_home下面的容量挪120G到VolGroup-lv_root中，
步骤如下：
1.先缩小VolGroup-lv_home,缩小是需要先umount的，扩大则不需要。
|
1
2
3
4
5
6
7
|
[root@localhost ~]# umount /home[root@localhost ~]# df -hFilesystem Size Used Avail Use% Mounted on/dev/mapper/VolGroup-lv_root 50G 747M 46G 2% /
tmpfs 7.8G 0 7.8G 0% /dev/shm
/dev/sda1 485M 32M 429M 7% /boot
|
2.使用resize2fs命令调整文件系统大小：
|
1
2
3
|
[root@localhost ~]# resize2fs /dev/mapper/VolGroup-lv_home 20Gresize2fs 1.41.12 (17-May-2010)
Please run \'e2fsck -f /dev/mapper/VolGroup-lv_home\' first.
|
执行resize2fs调整VolGroup-lv_home为20G，提示需要先执行e2fsck -f /dev/mapper/VolGroup-lv_home检查分区，那就执行吧。
|
1
2
3
4
5
6
7
8
|
[root@localhost ~]# e2fsck -f /dev/mapper/VolGroup-lv_homee2fsck 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/VolGroup-lv_home: 11/10829824 files (0.0% non-contiguous), 727657/43313152 blocks
|
检查完成后重新执行resize2fs命令
|
1
2
3
4
|
[root@localhost ~]# resize2fs /dev/mapper/VolGroup-lv_home 20Gresize2fs 1.41.12 (17-May-2010)
Resizing the filesystem on /dev/mapper/VolGroup-lv_home to 5242880 (4k) blocks.
The filesystem on /dev/mapper/VolGroup-lv_home is now 5242880 blocks long.
|
3.调整LVM分区大小
|
1
2
3
4
5
6
|
[root@localhost ~]# lvresize -L 20G /dev/mapper/VolGroup-lv_home WARNING: Reducing active logical volume to 20.00 GiB
THIS MAY DESTROY YOUR DATA (filesystem etc.)
Do you really want to reduce lv_home? [y/n]: y Reducing logical volume lv_home to 20.00 GiB
Logical volume lv_home successfully resized
|
执行成功， 重新mount /home
|
1
2
3
4
5
6
7
8
|
[root@localhost ~]# df -hFilesystem Size Used Avail Use% Mounted on/dev/mapper/VolGroup-lv_root 50G 747M 46G 2% /
tmpfs 7.8G 0 7.8G 0% /dev/shm
/dev/sda1 485M 32M 429M 7% /boot
/dev/mapper/VolGroup-lv_home 20G 172M 19G 1% /home
|
可以看到VolGroup-lv_home已经变成20G了
4.把VolGroup-lv_root调大，由于VolGroup-lv_home从163G变成了20G，所以可以使用的大小为143G
先调整Lvm大小
|
1
2
3
|
[root@localhost ~]# lvresize -L +143G /dev/mapper/VolGroup-lv_root Extending logical volume lv_root to 193.00 GiB
Logical volume lv_root successfully resized
|
再调整文件系统大小
|
1
2
3
4
5
6
|
[root@localhost ~]# resize2fs /dev/mapper/VolGroup-lv_rootresize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/mapper/VolGroup-lv_root is mounted on /; on-line resizing required
old desc_blocks = 4, new_desc_blocks = 13
Performing an on-line resize of /dev/mapper/VolGroup-lv_root to 50593792 (4k) blocks.
The filesystem on /dev/mapper/VolGroup-lv_root is now 50593792 blocks long.
|
5.最后查看分区情况，可以看到已经调整成功了
|
1
2
3
4
5
6
7
8
|
[root@localhost ~]# df -hFilesystem Size Used Avail Use% Mounted on/dev/mapper/VolGroup-lv_root 190G 754M 180G 1% /
tmpfs 7.8G 0 7.8G 0% /dev/shm
/dev/sda1 485M 32M 429M 7% /boot
/dev/mapper/VolGroup-lv_home 20G 172M 19G 1% /home
|