Overview
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| How to rename a Volume group in LVM |
Procedures
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Create a vg_test and rename it to vg_original. |
--- Volume groups ---
VG Name /dev/vg_test
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 0
Open LV 0
Max PV 255
Cur PV 4
Act PV 4
Max PE per PV 10000
VGDA 8
PE Size (Mbytes) 128
Total PE 1596
Alloc PE 0
Free PE 1596
Total PVG 1
Total Spare PVs 0
Total Spare PVs in use 0
VG Version 1.0
VG Max Size 318750g
VG Max Extents 2550000
--- Physical volumes ---
PV Name /dev/disk/disk68
PV Status available
Total PE 399
Free PE 399
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk72
PV Status available
Total PE 399
Free PE 399
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk73
PV Status available
Total PE 399
Free PE 399
Autoswitch On
Proactive Polling On
PV Name /dev/disk/disk66
PV Status available
Total PE 399
Free PE 399
Autoswitch On
Proactive Polling On
--- Physical volume groups ---
PVG Name PVG001
PV Name /dev/disk/disk68
PV Name /dev/disk/disk72
PV Name /dev/disk/disk73
PV Name /dev/disk/disk66
#-> vgdisplay /dev/vg_test
--- Volume groups ---
VG Name /dev/vg_test
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 0
Open LV 0
Max PV 255
Cur PV 4
Act PV 4
Max PE per PV 10000
VGDA 8
PE Size (Mbytes) 128
Total PE 1596
Alloc PE 0
Free PE 1596
Total PVG 1
Total Spare PVs 0
Total Spare PVs in use 0
VG Version 1.0
VG Max Size 318750g
VG Max Extents 2550000
#-> #Rename the vg vg_test to vg_original
#-> vgexport -s -v -m vg_test.mapfile vg_test
Beginning the export process on Volume Group "vg_test".
vgexport: Volume group "vg_test" is still active.
vgexport: Couldn't export volume group "vg_test".
#-> ll vg_test.mapfile
vg_test.mapfile not found
#-> vgexport -p -s -v -m vg_test.mapfile vg_test
Beginning the export process on Volume Group "vg_test".
vgexport: Volume group "vg_test" is still active.
/dev/disk/disk68
/dev/disk/disk72
/dev/disk/disk73
/dev/disk/disk66
vgexport: Preview of vgexport on volume group "vg_test" succeeded.
Deactivate the volume group by entering the following command
#-> vgchange -a n vg_test
Volume group "vg_test" has been successfully changed.
If you want to retain the same minor number for the volume group, examine the volume group's
group file as follows
#-> ll /dev/vg_test/group
crw-r--r-- 1 root sys 64 0x280000 Jul 8 08:20 /dev/vg_test/group
Remove the volume group device files and its entry from the LVM configuration files by entering
the following command:
#-> vgexport vg_test
Physical volume "/dev/disk/disk68" has been successfully deleted from
physical volume group "PVG001".
Physical volume "/dev/disk/disk72" has been successfully deleted from
physical volume group "PVG001".
Physical volume "/dev/disk/disk73" has been successfully deleted from
physical volume group "PVG001".
Physical volume "/dev/disk/disk66" has been successfully deleted from
physical volume group "PVG001".
vgexport: Volume group "vg_test" has been successfully removed.
#-> mkdir /dev/vg_original
#-> mknod /dev/vg_original/group c 64 0x280000
#-> vgimport -s -v -m vg_test.mapfile /dev/vg_original
The legacy naming model has been disabled on the system.
Try with the -N option.
Add the volume group entry back to the LVM configuration files using the vgimport command
as follows use new volume group name to import the information:
#-> vgimport -s -v -N -m vg_test.mapfile /dev/vg_original
Beginning the import process on Volume Group "/dev/vg_original".
vgimport: Volume group "/dev/vg_original" has been successfully created.
Warning: A backup of this volume group may not exist on this machine.
Please remember to take a backup using the vgcfgbackup command after activating the volume group.
Activate the newly imported volume group as follows:
#-> vgdisplay /dev/vg_original
vgdisplay: Volume group not activated.
vgdisplay: Cannot display volume group "/dev/vg_original".
#-> vgchange -a y /dev/vg_original
Activated volume group.
Volume group "/dev/vg_original" has been successfully changed.
#-> vgdisplay /dev/vg_original
--- Volume groups ---
VG Name /dev/vg_original
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 0
Open LV 0
Max PV 255
Cur PV 4
Act PV 4
Max PE per PV 10000
VGDA 8
PE Size (Mbytes) 128
Total PE 1596
Alloc PE 0
Free PE 1596
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0
VG Version 1.0
VG Max Size 318750g
VG Max Extents 2550000
Back up the volume group configuration as follows
#-> vgcfgbackup /dev/vg_original
Keywords.
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vgimport , vgexport
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