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Linux: Extending Partition in LVM

June 28, 2012 Posted by lillurob under CentOS, Linux, RedHat
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  • Start off by running the df -h command to list all the partitions on the system
    • [root@oraprod ~]# df -h
Filesystem            			Size  Used Avail Use% Mounted on
/dev/mapper/ORAPROD_VG00-LogVol00	992M  395M  546M  42% /
/dev/mapper/ORAPROD_VG00-LogVol05	992M   37M  904M   4% /opt
/dev/mapper/ORAPROD_VG00-LogVol01	2.0G   68M  1.8G   4% /tmp
/dev/mapper/ORAPROD_VG00-LogVol06	2.0G  324M  1.6G  18% /home
/dev/mapper/ORAPROD_VG00-LogVol04	2.0G  172M  1.7G  10% /var
/dev/mapper/ORAPROD_VG00-LogVol03	3.0G  2.3G  563M  81% /usr
/dev/mapper/ORAPROD_VG00-LogVol07	9.7G  8.9G  329M  97% /u01
/dev/mapper/ORAPROD_VG01-LogVol08	20G   16G  3.0G  85% /backup
/dev/mapper/ORAPROD_VG02-LogVol00	9.9G  151M  9.2G   2% /ggs
/dev/sda1              			99M   17M   78M  18% /boot
tmpfs                  			10G  4.9G  5.2G  49% /dev/shm
[root@oraprod ~]#
  • In our case, we need to extend the /u01 partition. Currently the size for this partition is of 10GB and we need to extend it to 11GB
  • Verify that you have sufficient free space on the volume group to be used for this extension
    • [root@oraprod ~]# vgdisplay ORAPROD_VG00
  --- Volume group ---
  VG Name               ORAPROD_VG00
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  12
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                8
  Open LV               8
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               39.88 GB
  PE Size               32.00 MB
  Total PE              1276
  Alloc PE / Size       1184 / 37.00 GB
  Free  PE / Size       92 / 2.88 GB
  VG UUID               EcusxF-Kr0e-3vvA-hV4e-77XO-2HRJ-1wNasI

[root@oraprod ~]#
  • We still have 2.88GB of free space so we can go ahead and extend the /u01 partition.
  • Confirm the partition size for the /u01 partition
    • [root@oraprod ~]# lvdisplay /dev/ORAPROD_VG00/LogVol07
  --- Logical volume ---
  LV Name                /dev/ORAPROD_VG00/LogVol07
  VG Name                ORAPROD_VG00
  LV UUID                gPXtBa-r9V1-qHYg-Zi2R-bPA3-o381-vQIrzV
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                10.00 GB
  Current LE             320
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:6

[root@oraprod ~]#
  • Extend partition
    • [root@oraprod ~]# lvresize -L +1GB /dev/ORAPROD_VG00/LogVol07
  Extending logical volume LogVol07 to 11.00 GB
  Logical volume LogVol07 successfully resized
[root@oraprod ~]#
  • Extend file system
    • [root@oraprod ~]# resize2fs -p /dev/ORAPROD_VG00/LogVol07
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/ORAPROD_VG00/LogVol07 is mounted on /u01; on-line resizing required
Performing an on-line resize of /dev/ORAPROD_VG00/LogVol07 to 2883584 (4k) blocks.
The filesystem on /dev/ORAPROD_VG00/LogVol07 is now 2883584 blocks long.

[root@oraprod ~]#
  • Verify that the extend was successful
    • [root@oraprod ~]# lvdisplay /dev/ORAPROD_VG00/LogVol07
  --- Logical volume ---
  LV Name                /dev/ORAPROD_VG00/LogVol07
  VG Name                ORAPROD_VG00
  LV UUID                gPXtBa-r9V1-qHYg-Zi2R-bPA3-o381-vQIrzV
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                11.00 GB
  Current LE             352
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:6

[root@oraprod ~]#
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