Logical Volume Renaming

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)											
											

NEWS CONTENTS

• 20110715 : LVM Renaming - How to rename logical volumes (LVM's) in Linux - Lvm, Lvs, Lvrename, Lvdisplay, Logvol ( LVM Renaming - How to rename logical volumes (LVM's) in Linux - Lvm, Lvs, Lvrename, Lvdisplay, Logvol, Jul 15, 2011 )

Old News ;-)

[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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