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Logical Volume Renaming

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Renaming a logical volume is a three step process:

  1. Rename the LV
  2. Remount the file system
  3. Update /etc/fstab

Remounting the file system is necessary in order for the user space to see the name change.

We will assume you already have a logical volume (LV) created on your system use the command

In older version of LVM you do not need "full path" and can use just labels (as it should be)

lvrename VG00 LogVol02  tmp

But on SLES 11 you need to use "full path"

lvrename VG00 /dev/VG01/LogVol02 /dev/VG01/tmp

For example:

# df -k
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda3             11904620   3259964   8030172  29% /
/dev/mapper/VolGroup00-LogVol01
                      11902896    225052  11063444   2% /var
/dev/mapper/VolGroup00-LogVol02
                      15870920   2233504  12818216  15% /tmp
/dev/sda1               497829     17029    455098   4% /boot
tmpfs                  2020820         0   2020820   0% /dev/shm
/dev/mapper/VolGroup00-LogVol00
                     198384608   1432960 186711648   1% /Accelrys
# lvrename VolGroup00 LogVol02 tmp
  Renamed "LogVol02" to "tmp" in volume group "VolGroup00"
# lvrename VolGroup00 LogVol01 var
  Renamed "LogVol01" to "var" in volume group "VolGroup00"
# lvs
  LV       VG         Attr   LSize   Origin Snap%  Move Log Copy%  Convert
  accelrys VolGroup00 -wi-ao 195.31G
  tmp      VolGroup00 -wi-ao  15.62G
  var      VolGroup00 -wi-ao  11.72G
# vi /etc/fstab
# mount
/dev/sda3 on / type ext3 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
/dev/mapper/VolGroup00-LogVol01 on /var type ext3 (rw)
/dev/mapper/VolGroup00-LogVol02 on /tmp type ext3 (rw)
/dev/sda1 on /boot type ext3 (rw)
tmpfs on /dev/shm type tmpfs (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
/dev/mapper/VolGroup00-LogVol00 on /Accelrys type ext3 (rw)											
											

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[Jul 15, 2011] LVM Renaming - How to rename logical volumes (LVM's) in Linux - Lvm, Lvs, Lvrename, Lvdisplay, Logvol

Renaming a logical volume is a three step process:

  1. Rename the LV
  2. Remount the file system
  3. Update /etc/fstab

Remounting the file system is necessary in order for the user space to see the name change.

Note: The output of the df command will not display the new name of the file system until it has been remounted.

In the following example, we will rename the logical volume DataLV to TCPDumpLV. Lets get started!

  1. Begin by listing all the logical volumes on the system

    [root@Linux01 ~]# lvs
    LV VG Attr LSize Origin Snap% Move Log Copy% Convert
    DataLV TCPDumpVolGRP -wi-ao 2.00G

    LogVol00 VolGroup00 -wi-ao 1.00G
    LogVol01 VolGroup00 -wi-ao 1.94G
    LogVol02 VolGroup00 -wi-ao 1.00G

    LogVol03 VolGroup00 -wi-ao 2.00G
    LogVol04 VolGroup00 -wi-ao 3.94G
    [root@Linux01 ~]#

  2. Let's find out where DataLV is mounted

    [root@Linux01 ~]# df -kh
    Filesystem
    Size
    Used Avail Use% Mounted on
    /dev/mapper/VolGroup00-LogVol04
    3.9G 2.2G 1.6G 59% /
    /dev/sda1
    99M
    12M 82M 13% /boot
    tmpfs
    1006M
    0 1006M 0% /dev/shm
    /dev/mapper/VolGroup00-LogVol00 992M 41M 901M 5% /home
    /dev/mapper/VolGroup00-LogVol02 992M 69M 872M 8% /tmp
    /dev/mapper/VolGroup00-LogVol03
    2.0G
    150M 1.7G 8% /var
    /dev/mapper/TCPDumpVolGRP-DataLV
    2.0G
    568M 1.4G 30% /Data
    Note: The DataLV is mounted on /Data

  3. Rename DataLV to TCPDumpLV

    [root@Linux01 /]# lvrename TCPDumpVolGRP DataLV TCPDumpLV
    Renamed "DataLV" to "TCPDumpLV" in volume group "TCPDumpVolGRP"
    [root@Linux01 /]#

  4. Verify the logical volume has been renamed

    [root@Linux01 ~]# lvs
    LV VG Attr LSize Origin Snap% Move Log Copy% Convert
    TCPDumpLV TCPDumpVolGRP -wi-ao 2.00G

    LogVol00 VolGroup00 -wi-ao 1.00G
    LogVol01 VolGroup00 -wi-ao 1.94G
    LogVol02 VolGroup00 -wi-ao 1.00G

    LogVol03 VolGroup00 -wi-ao 2.00G
    LogVol04 VolGroup00 -wi-ao 3.94G
    [root@Linux01 ~]#

  5. Notice the user space has yet to be updated, this is because the file system must be remounted

    [root@Linux01 ~]# df -kh
    Filesystem
    Size
    Used Avail Use% Mounted on
    /dev/mapper/VolGroup00-LogVol04
    3.9G 2.2G 1.6G 59% /
    /dev/sda1
    99M
    12M 82M 13% /boot
    tmpfs
    1006M
    0 1006M 0% /dev/shm
    /dev/mapper/VolGroup00-LogVol00 992M 41M 901M 5% /home
    /dev/mapper/VolGroup00-LogVol02 992M 69M 872M 8% /tmp
    /dev/mapper/VolGroup00-LogVol03
    2.0G
    150M 1.7G 8% /var
    /dev/mapper/TCPDumpVolGRP-DataLV
    2.0G
    568M 1.4G 30% /Data

  6. Remount the file system to update the user space

    [root@Linux01 /]# umount /dev/mapper/TCPDumpVolGRP-DataLV
    [root@Linux01 /]# mount /dev/TCPDumpVolGRP/TCPDumpLV /Data/
    [root@Linux01 /]#

  7. Verify the file system has been mounted

    [root@Linux01 ~]# df -kh
    Filesystem
    Size
    Used Avail Use% Mounted on
    /dev/mapper/VolGroup00-LogVol04
    3.9G 2.2G 1.6G 59% /
    /dev/sda1
    99M
    12M 82M 13% /boot
    tmpfs
    1006M
    0 1006M 0% /dev/shm
    /dev/mapper/VolGroup00-LogVol00 992M 41M 901M 5% /home
    /dev/mapper/VolGroup00-LogVol02 992M 69M 872M 8% /tmp
    /dev/mapper/VolGroup00-LogVol03
    2.0G
    150M 1.7G 8% /var
    /dev/mapper/TCPDumpVolGRP-TCPDumpLV
    2.0G
    568M 1.4G 30% /Data

  8. Update /etc/fstab to reflect the new name of the file system

    /dev/mapper/TCPDumpVolGRP-DataLV /Data
    ext3 defaults 0 0
    /dev/mapper/TCPDumpVolGRP-TCPDumpLV /Data
    ext3 defaults 0 0



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