linux6.9中調整/home分區增大其他

需求：Home邏輯區劃大了，格式化一部分給opt邏輯區。【原本opt只有7g,結果會增到10g】

環境：oracle_linux6.9

[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
4.7G 3.3G 1.3G 73% /
tmpfs 492M 76K 492M 1% /dev/shm
/dev/sda1 477M 77M 371M 18% /boot
/dev/mapper/VolGroup-LogVol02
4.7G 9.8M 4.5G 1% /home
/dev/mapper/VolGroup-LogVol03
7.6G 18M 7.2G 1% /opt
[root@localhost ~]# umount /home/
[root@localhost ~]# resizze2fs -p /dev/mapper/
control VolGroup-LogVol02 VolGroup-LogVol03 VolGroup-lv_root VolGroup-lv_swap
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
4.7G 3.3G 1.3G 73% /
tmpfs 492M 76K 492M 1% /dev/shm
/dev/sda1 477M 77M 371M 18% /boot
/dev/mapper/VolGroup-LogVol03
7.6G 18M 7.2G 1% /opt

[root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-LogVol02 4G
resize2fs 1.43-WIP (20-Jun-2013)
Please run 'e2fsck -f /dev/mapper/VolGroup-LogVol02' first.

[root@localhost ~]# e2fsck -f /dev/mapper/VolGroup-LogVol02
e2fsck 1.43-WIP (20-Jun-2013)
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-LogVol02: 11/320000 files (0.0% non-contiguous), 55366/1280000 blocks

[root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-LogVol02_home 4G [這裏我故意放報錯的看看，格式化時我加上路徑Home是不對的，要看自己的卷組是什麼名字才用什麼名字。]
resize2fs 1.43-WIP (20-Jun-2013)
open: No such file or directory while opening /dev/mapper/VolGroup-LogVol02_home

[root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-LogVol02 4G
resize2fs 1.43-WIP (20-Jun-2013)
Resizing the filesystem on /dev/mapper/VolGroup-LogVol02 to 1048576 (4k) blocks.
Begin pass 3 (max = 40)
Scanning inode table XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
The filesystem on /dev/mapper/VolGroup-LogVol02 is now 1048576 blocks long.

[root@localhost ~]# mount /home/
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
4.7G 3.4G 1.1G 76% /
tmpfs 492M 76K 492M 1% /dev/shm
/dev/sda1 477M 77M 371M 18% /boot
/dev/mapper/VolGroup-LogVol03
7.6G 18M 7.2G 1% /opt
/dev/mapper/VolGroup-LogVol02
3.9G 9.8M 3.6G 1% /home

[root@localhost ~]# lvreduce -L 4G /dev/mapper/VolGroup-LogVol02
WARNING: Reducing active and open logical volume to 4.00 GiB.
THIS MAY DESTROY YOUR DATA (filesystem etc.)
Do you really want to reduce VolGroup/LogVol02? [y/n]: y
Size of logical volume VolGroup/LogVol02 changed from 4.88 GiB (1250 extents) to 4.00 GiB (1024 extents).
Logical volume LogVol02 successfully resized.

[root@localhost ~]# vgdisplay
--- Volume group ---
VG Name VolGroup
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 6
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 4
Open LV 4
Max PV 0
Cur PV 1
Act PV 1
VG Size 19.51 GiB
PE Size 4.00 MiB
Total PE 4994
Alloc PE / Size 4768 / 18.62 GiB
Free PE / Size 226 / 904.00 MiB
VG UUID Hrires-m0qh-Savz-JPHu-mJ9W-aA4W-Mjrngg

[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
4.7G 3.5G 1.1G 78% /
tmpfs 492M 76K 492M 1% /dev/shm
/dev/sda1 477M 77M 371M 18% /boot
/dev/mapper/VolGroup-LogVol03
7.6G 18M 7.2G 1% /opt
/dev/mapper/VolGroup-LogVol02
3.9G 9.8M 3.6G 1% /home

[root@localhost ~]# lvextend -L 900M /dev/mapper/VolGroup-LogVol03 【這裏報錯是沒有加參數+在900前面】
New size given (225 extents) not larger than existing size (1998 extents)
Run `lvextend --help' for more information.

[root@localhost ~]# lvextend -L +900M /dev/mapper/VolGroup-LogVol03
Size of logical volume VolGroup/LogVol03 changed from 7.80 GiB (1998 extents) to 8.68 GiB (2223 extents).
Logical volume LogVol03 successfully resized.

[root@localhost ~]# resize2fs -p /dev/mapper/VolGroup-LogVol03
resize2fs 1.43-WIP (20-Jun-2013)
Filesystem at /dev/mapper/VolGroup-LogVol03 is mounted on /opt; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 1
The filesystem on /dev/mapper/VolGroup-LogVol03 is now 2276352 blocks long.

[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup-lv_root
4.7G 3.5G 978M 79% /
tmpfs 492M 76K 492M 1% /dev/shm
/dev/sda1 477M 77M 371M 18% /boot
/dev/mapper/VolGroup-LogVol03
8.5G 18M 8.0G 1% /opt
/dev/mapper/VolGroup-LogVol02
3.9G 9.8M 3.6G 1% /home
[root@localhost ~]# umount / 【末尾我想試一試卸掛載的根目錄，調整根目錄大小，顯示系統文件在進程中使用。】
umount: /: device is busy.
(In some cases useful info about processes that use
the device is found by lsof(8) or fuser(1))

結果對比：

調整前：