centos7 lvm

CentOS 7 supports Logical Volume Manager (LVM), which is a flexible and powerful storage system. LVM allows you to manage your storage devices, such as hard drives or partitions, by creating logical volumes that can span across multiple physical volumes.

To use LVM in CentOS 7, follow these steps:

1. Install the required packages:

   # yum install lvm2

2. Create physical volumes (PVs) by initializing the storage devices:

   # pvcreate /dev/sdX

3. Create a volume group (VG) that will contain the physical volumes:

   # vgcreate vg_name /dev/sdX

4. Create logical volumes (LVs) within the volume group:

   # lvcreate -L size -n lv_name vg_name

Replace `size` with the desired size of the logical volume and `lv_name` with the name you want to give to the logical volume.

5. Format the logical volume with a file system:

   # mkfs.filessystem /dev/vg_name/lv_name

Replace `filesystem` with the desired file system type, such as ext4.

6. Mount the logical volume to a directory:

   # mount /dev/vg_name/lv_name /mnt/mount_point

Replace `/mnt/mount_point` with the directory where you want to mount the logical volume.

You can now use the logical volume for your storage needs. Remember to update your `/etc/fstab` file if you want the logical volume to be mounted automatically on system boot.

Note: Make sure to replace `/dev/sdX` with the actual device name of your storage device.