LVM

LVM stands for Logical Volume Manager. It provides a way for extending filesystems by adding new partitions to the "logical volume".

Creating the initial logical volume

1. Create the partition(s) on the device

   # fdisk <device> 

2. Create the Physical Volume entry

   # pvcreate <Partition Device>

3. Create the Volume Group

   # vgcreate <GroupName> <PhysicalVolume> 

4. Verify the Volume Group was created. Take note of the "Total PE" field

   # vgdisplay 

5. Create the Logical Volume

   # lvcreate --extents <Total PE> <VolumeGroup> 

6. Verify the Logical Volume was created

    # lvdisplay

7. Format the Logical Volume

    # mke2fs /dev/<VolumeGroup>/<LogicalVolume> 

Extending a filesystem running on LVM (untested and incomplete)

1. Create partition of new device

    # fdisk <device> 

2. Create the new Physical Volume

    # pvcreate <Partition> 

3. Add the Physical Volume to the Volume Group

    # vgextend ... 

4. Extend the Logical Volume

    # lvextend ... 

5. Resize the filesystem

    # ext2online/resize2fs ...