Extending an LVM volume in Linux 6

 

Extending an LVM volume in Linux 6:

Storage Layers : Physical volumes (partitions) -> Volume groups -> Logical volume -> Filesystem

Logical Volumes are allocated/extended within the boundaries of their underlying storage pool which is called a Volume Group in LVM terminology. 

• addto VMWare a new virtual hard disk 

• as root user  

•  check the newly added disks

# ls /dev/sd*

/dev/sda /dev/sda1 /dev/sda2 /dev/sdb

note that the new disk is : sdb

check Volume Group name:

# vgdisplay

 --- Volume group ---
  VG Name               vg_linux6
  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               18.14 GiB
  PE Size               4.00 MiB
  Total PE              4645
  Alloc PE / Size       4480 / 17.50 GiB
  Free  PE / Size       00 / 00.00 MiB
  VG UUID               IwaFL0-QCi8-iIUE-TWjQ-R906-PYpH-gMPaH9

partition to the Volume Group:

# pvcreate /dev/sdb 

# vgextend vg_linux6 /dev/sdb

check the new free size 

#vgdisplay

After you've extended the Volume Group, you are free to extend the Logical Volume:

# lvdisplay

--- Logical volume ---

  LV Path                /dev/vg_linux6/LogVol01

  LV Name              LogVol00 

 VG Name              vg_linux6

  LV size         4.0 GB

..............

  LV Path                /dev/vg_linux6/LogVol01

  LV Name              LogVol01

  VG Name              vg_linux6

  LV size         16.0 GB

  

decide witch LV you want to extend then :

 

# lvextend -L+10G /dev/vg_linux6/LogVol01

note : 10G is the size of disk sdb

# resize2fs /dev/vg_linux6/LogVol01

check the new size of LV

# lvdisplay