vgextend

pedenski · 05-24-2013, 05:57 AM

my guest OS ubuntu server was installed with 16GB default, on my vsphere i added 4GB. now im trying to merge my logical volume, but im getting the error

Code:

root@media:~# lvextend -l 100%FREE /dev/media/root
  New size given (6 extents) not larger than existing size (3773 extents)
  Run `lvextend --help' for more information.

root@media:~# pvdisplay

Code:

  --- Physical volume ---
  PV Name               /dev/sda5
  VG Name               media
  PV Size               15.76 GiB / not usable 2.00 MiB
  Allocatable           yes 
  PE Size               4.00 MiB
  Total PE              4034
  Free PE               6
  Allocated PE          4028
  PV UUID               3Wb6q0-6MI7-Ltdv-g014-DbVk-ldRY-4yHgKC
   
  --- Physical volume ---
  PV Name               /dev/sda3
  VG Name               media
  PV Size               1023.00 KiB
  Allocatable           NO
  PE Size               4.00 MiB
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               wvlrjC-STIH-oSyw-hQji-TElm-BTVq-sxaWFV

root@media:~# vgdisplay

Code:

root@media:~# vgdisplay 
  --- Volume group ---
  VG Name               media
  System ID             
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  4
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               15.76 GiB
  PE Size               4.00 MiB
  Total PE              4034
  Alloc PE / Size       4028 / 15.73 GiB
  Free  PE / Size       6 / 24.00 MiB
  VG UUID               07YA6U-woMS-aRTh-TlIL-0Yuk-DrJ3-dFs3Mo

root@media:~# lvdisplay

Code:

 --- Logical volume ---
  LV Name                /dev/media/root
  VG Name                media
  LV UUID                jlT97A-4Dye-UCZX-5kkL-7yYq-0Z7g-I36xHQ
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                14.74 GiB
  Current LE             3773
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:0
   
  --- Logical volume ---
  LV Name                /dev/media/swap_1
  VG Name                media
  LV UUID                PeEKTg-2sVo-tPcY-vMKk-m9vJ-YXYm-9cl15Y
  LV Write Access        read/write
  LV Status              available
  # open                 2
  LV Size                1020.00 MiB
  Current LE             255
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:1

goarilla · 05-24-2013, 04:29 PM

try: lvextend -l +100%FREE dev/media/root

haertig · 05-24-2013, 07:40 PM

Yes, goarilla is right.

The command "lvextend -l 100%FREE /dev/media/root" says "make the volume the EXACT SIZE of the existing unallocated space in the vg". Not what you want. Adding that + sign alters the meaning to "ADD the amount of the existing unallocated space to the existing volumes size".

After extending the LV size, you will also need to resize the filesystem that exists on that LV.

Madhu Desai · 05-25-2013, 12:35 AM

Quote:

was installed with 16GB default, on my vsphere i added 4GB.

Where is Physical volume of 4gb? your pvdisplay command shows only 2 PVs - 16gb and 1mb. create physical volume of 4gb first.

Code:

# pvcreate /dev/sdxx

Then, add newly created PV to volume group.

Code:

# vgextend media /dev/sdxx

Verify it - you should be shown 4gb as VFree space.

Code:

# vgs

Since you are extending root LV, boot in rescue mode and follow the steps

Code:

# lvm lvextend -l +100%FREE /dev/media/root
# resize2fs -f /dev/media/root
# reboot