From Wsms

Note: This page should be titled lvextend (all lowercase). It is Lvextend due to the technical limitations of Mediawiki.

lvextend

lvextend extends the size of a logical volume.

example

This is on CentOS 5.

[root@localhost ~]# vgdisplay -v
    Finding all volume groups
    Finding volume group "VolGroup00"
    Fixing up missing format1 size (74.43 GB) for PV /dev/hda2
  --- Volume group ---
  VG Name               VolGroup00
  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               74.43 GB
  PE Size               4.00 MB
  Total PE              19053
  Alloc PE / Size       18176 / 71.00 GB
  Free  PE / Size       877 / 3.43 GB
  VG UUID               RReTRk-7lKq-6Lq4-JmlG-7iyr-RjbP-J1ENDE
   
  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol00
  VG Name                VolGroup00
  LV UUID                Qp37kG-WCga-iR8s-JkwA-Bkf5-vCB0-fg57wq
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                70.00 GB
  Current LE             17920
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:0
   
  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol01
  VG Name                VolGroup00
  LV UUID                I6rJCH-a3jB-9PwA-Pqu9-VdVf-15iN-XzS74f
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                1.00 GB
  Current LE             256
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:1
   
  --- Physical volumes ---
  PV Name               /dev/hda2     
  PV UUID               7MQOks-4Fb2-slQm-SDBm-1dAw-QsWk-wl2wea
  PV Status             allocatable
  Total PE / Free PE    19053 / 877
   
[root@localhost ~]# lvextend --extents +100%FREE /dev/VolGroup00/LogVol00
  Extending logical volume LogVol00 to 73.43 GB
  Logical volume LogVol00 successfully resized
[root@localhost ~]# resize2fs /dev/VolGroup00/LogVol00
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required
Performing an on-line resize of /dev/VolGroup00/LogVol00 to 19248128 (4k) blocks.
The filesystem on /dev/VolGroup00/LogVol00 is now 19248128 blocks long.
[root@localhost ~]# vgdisplay -v
    Finding all volume groups
    Finding volume group "VolGroup00"
  --- Volume group ---
  VG Name               VolGroup00
  System ID             
  Format                lvm2
  Metadata Areas        1
  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                1
  Act PV                1
  VG Size               74.43 GB
  PE Size               4.00 MB
  Total PE              19053
  Alloc PE / Size       19053 / 74.43 GB
  Free  PE / Size       0 / 0   
  VG UUID               RReTRk-7lKq-6Lq4-JmlG-7iyr-RjbP-J1ENDE
   
  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol00
  VG Name                VolGroup00
  LV UUID                Qp37kG-WCga-iR8s-JkwA-Bkf5-vCB0-fg57wq
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                73.43 GB
  Current LE             18797
  Segments               2
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:0
   
  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol01
  VG Name                VolGroup00
  LV UUID                I6rJCH-a3jB-9PwA-Pqu9-VdVf-15iN-XzS74f
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                1.00 GB
  Current LE             256
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:1
   
  --- Physical volumes ---
  PV Name               /dev/hda2     
  PV UUID               7MQOks-4Fb2-slQm-SDBm-1dAw-QsWk-wl2wea
  PV Status             allocatable
  Total PE / Free PE    19053 / 0
   

see also

LVM