Welcome to Part 2 of this series of 4 articles detailing how to setup and configure multiple filesystems running on LVM partitions. Each article will cover a specific topic, per the below:
In Part 2 we will cover Volume Group Management and will create a volume group called data and add /dev/sdb1 – /dev/sdd1 to it by running the following command:
vgcreate data /dev/sdb1 /dev/sdc1 /dev/sdd1
The result of which is:
[root@lnx-svr-01 ~]# vgcreate data /dev/sdb1 /dev/sdc1 /dev/sdd1 Volume group "data" successfully created [root@lnx-svr-01 ~]#
To display information about our volume groups we run vgdisplay:
[root@lnx-svr-01 ~]# vgdisplay --- Volume group --- VG Name data System ID Format lvm2 Metadata Areas 3 Metadata Sequence No 1 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 3 Act PV 3 VG Size 19.98 GiB PE Size 4.00 MiB Total PE 5114 Alloc PE / Size 0 / 0 Free PE / Size 5114 / 19.98 GiB VG UUID 6eGhBN-LhH2-loZy-Vv04-adpB-NTiY-FToZMP --- Volume group --- VG Name VolGroup System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 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 4994 / 19.51 GiB Free PE / Size 0 / 0 VG UUID 4Con9G-f33H-UBae-36Z0-dhOE-K2y4-0HFDty [root@lnx-svr-01 ~]#
As you can see from the above, we have two volume groups; data and VolGroup. The VolGroup volume group was created during the install of the operating system, so was already present before we created the data volume group in the previous step.
You can run vgscan to scan the system and display volume groups also:
[root@lnx-svr-01 ~]# vgscan Reading all physical volumes. This may take a while... Found volume group "data" using metadata type lvm2 Found volume group "VolGroup" using metadata type lvm2 [root@lnx-svr-01 ~]#
Please note that to rename the data volume group simply run the vgrename command:
[root@lnx-svr-01 ~]# vgrename data store Volume group "data" successfully renamed to "store" [root@lnx-svr-01 ~]#
The above command renames the data volume group to store.
Please also note that to delete the volume group run vgremove:
[root@lnx-svr-01 ~]# vgremove data Volume group "data" successfully removed [root@lnx-svr-01 ~]#
There is no need to run these two commands (vgrename and vgremove), they are for your reference only.
This is then end of Part 2. Please go to Part 3, to setup and configure Logical Volumes.
How to Create LVM Partition in RHEL 6 / CentoOS
Linux Basics – LVM (Logical Volume Manager) Tutorial
How to Install LVM on Linux and Disk Operations
A Beginner’s Guide To LVM
How To Create LVM Using vgcreate, lvcreate, and lvextend lvm2 Commands