Resize CentOS Linux Hard Drive partition (CentOS 6.3 tuning LVS disk size)

To view current disk information:

[Email protected] ~]# df-h

file system capacity has been used with available percent mount points
/dev/mapper/volgroup-lv_root
154G 7.9G 139G 6%/
tmpfs 1.9G 100K 1.9G 1%/dev/shm
/dev/sda1 485M 69M 391M 15%/boot
/dev/mapper/volgroup-lv_home

299G 984M 283G 1%/Home

Reduce the Volgroup-lv_home to 20G and add the remaining space to the Volgroup-lv_root

Uninstall/Home First:

[Email protected] ~]# Umount/home
[Email protected] ~]# e2fsck-f/dev/mapper/volgroup-lv_home
E2fsck 1.41.12 (17-may-2010)
First step: Check Inode, block, and size
Step Two: Check the directory structure
3rd Step: Check the directory connectivity
Pass 4:checking Reference counts
5th Step: Check Cluster summary information
/dev/mapper/volgroup-lv_home:21/19857408 files (0.0% non-contiguous), 1498180/79429632 blocks

Note: e2fsck to check for disk correctness

[[email protected] ~]# resize2fs-p/dev/mapper/volgroup-lv_home 20G

RESIZE2FS 1.41.12 (17-may-2010)
resizing the filesystem on/dev/mapper/volgroup-lv_home to 5242880 (4k) blocks.
begin pass 2 (max = 32778)
relocating blocks              xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
begin Pass 3 (max = 2424)
begin pass 4 (max = ten)
the filesystem on/dev/mapper/volgroup-lv_home is now 5242880 blocks long.

note: resize2fs to reset the disk size, just re-specify the size, do not affect the results, you need the following lvreduce mate

[[email protected] ~]# mount/home
[
[[email protected] ~]# lvreduce-l 20g/dev/mapper/volgroup-lv_home
  WARNING: Reducing active and open 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

Note: lvreduce-l 20G means to set the current file system to 20G, if lvreduce-l 20G refers to the reduction of 20G from the current file system

[Email protected] ~]# df-h
File system capacity has been used with available percent mount points
/dev/mapper/volgroup-lv_root
154G 7.9G 139G 6%/
Tmpfs 1.9G 100K 1.9G 1%/DEV/SHM
/DEV/SDA1 485M 69M 391M 15%/boot
/dev/mapper/volgroup-lv_home
20G 962M 18G 6%/Home (description succeeded)

[Email protected] ~]# Vgdisplay
---Volume Group---
VG Name VolGroup
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 7
VG Access Read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 3
Max PV 0
Cur PV 1
ACT PV 1
VG Size 465.27 GiB
PE Size 4.00 MiB
Total PE 119109
Alloc pe/size 46660/182.27 GiB
Free Pe/size 72449/283.00 GiB
VG UUID Gpa8xs-znck-mgqj-2vn9-tftq-6you-6atje9

Note: Vgdisplay to display metadata information for an LVM volume group

[Email protected] ~]# lvextend-l +283g/dev/mapper/volgroup-lv_root
Extending logical Volume Lv_root to 439.39 GiB
Logical Volume Lv_root successfully resized

Note: lvextend-l +283g adds 238G to the file system

[Email protected] ~]# resize2fs-p/dev/mapper/volgroup-lv_root
RESIZE2FS 1.41.12 (17-may-2010)
Filesystem at/dev/mapper/volgroup-lv_root is mounted on/; On-line resizing required
Old desc_blocks = ten, new_desc_blocks = 28
Performing an on-line resize of/dev/mapper/volgroup-lv_root to 115183616 (4k) blocks.
The filesystem on/dev/mapper/volgroup-lv_root is now 115183616 blocks long.

Check the results of the adjustment:

[email protected] ~]# df-h
file system capacity has been used with available percent mount points
/dev/mapper/volgroup-lv_root
433G 7.9G 403G 2%/
tmpfs 1.9G 100K 1.9G 1%/dev/shm
/dev/sda1 485M 69M 391M 15%/boot
/dev/mapper/volgroup-lv_home
20G 962M 18G 6% /Home

Resize CentOS Linux hard Drive partition (CentOS 6.3 tuning LVS disk size)