How to rename Volume Group on Linux Centos 7
Scan the lv and check the Vg
[root@newdoksvr ~]# lvscan
ACTIVE '/dev/centos/root' [<66.41 GiB] inherit
ACTIVE '/dev/centos/home' [24.41 GiB] inherit
ACTIVE '/dev/centos/swap' [7.88 GiB] inherit
inactive '/dev/centos/root' [<1.91 TiB] inherit
inactive '/dev/centos/swap' [3.89 GiB] inherit
[root@newdoksvr ~]# lvmdiskscan
/dev/centos/swap [ 7.88 GiB]
/dev/sda1 [ 1.00 GiB]
/dev/centos/root [ <66.41 GiB]
/dev/sda2 [ <98.71 GiB] LVM physical volume
/dev/centos/home [ 24.41 GiB]
/dev/sdb1 [ <1.90 TiB]
/dev/sdc2 [ 500.00 MiB]
/dev/sdc3 [ 1.91 TiB] LVM physical volume
3 disks
3 partitions
0 LVM physical volume whole disks
2 LVM physical volumes
[root@newdoksvr ~]# vgs
VG #PV #LV #SN Attr VSize VFree
centos 1 3 0 wz--n- 98.70g 0
centos 1 2 0 wz--n- 1.91t 0
[root@newdoksvr ~]#
Rename the vg
[root@newdoksvr ~]$ vgrename ey9Myg-TvgG-K1eW-RLXd-cjHe-7hmL-bEYqvz centos_old
Processing VG centos because of matching UUID ey9Myg-TvgG-K1eW-RLXd-cjHe-7hmL-bEYqvz
Volume group "ey9Myg-TvgG-K1eW-RLXd-cjHe-7hmL-bEYqvz" successfully renamed to "centos_old"
[root@newdoksvr ~]$
[root@newdoksvr ~]$ vgs
VG #PV #LV #SN Attr VSize VFree
centos 1 3 0 wz--n- 98.70g 0
centos_old 1 2 0 wz--n- 1.91t 0
[root@newdoksvr ~]$ vgchange -ay centos_old
2 logical volume(s) in volume group "centos_old" now active
[root@newdoksvr ~]$
[root@newdoksvr ~]$ lvscan
ACTIVE '/dev/centos/root' [<66.41 GiB] inherit
ACTIVE '/dev/centos/home' [24.41 GiB] inherit
ACTIVE '/dev/centos/swap' [7.88 GiB] inherit
ACTIVE '/dev/centos_old/root' [<1.91 TiB] inherit
ACTIVE '/dev/centos_old/swap' [3.89 GiB] inherit
[root@newdoksvr ~]$ sudo mount /dev/centos_old/root /nfsserver
[root@newdoksvr ~]$
Check the df
[root@newdoksvr ~]$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 67G 4.3G 63G 7% /
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 96K 7.8G 1% /dev/shm
tmpfs 7.8G 9.0M 7.8G 1% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/sdb1 1.9T 1.5T 438G 78% /data/brick1
/dev/sda1 1014M 159M 856M 16% /boot
/dev/mapper/centos-home 25G 34M 25G 1% /home
tmpfs 1.6G 0 1.6G 0% /run/user/1000
/dev/mapper/centos_old-root 2.0T 1.5T 467G 77% /nfsserver
[root@newdoksvr ~]$
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