Installation guide

Moving Extents to a New Disk
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[root@tng3-1]# pvs -o+pv_used
PV VG Fmt Attr PSize PFree Used
/dev/sda1 myvg lvm2 a- 17.15G 7.15G 10.00G
/dev/sdb1 myvg lvm2 a- 17.15G 15.15G 2.00G
/dev/sdc1 myvg lvm2 a- 17.15G 15.15G 2.00G
We want to move the extents of /dev/sdb1 to a new device, /dev/sdd1.
5.4.2.1. Creating the New Physical Volume
Create a new physical volume from /dev/sdd1.
[root@tng3-1 ~]# pvcreate /dev/sdd1
Physical volume "/dev/sdd1" successfully created
5.4.2.2. Adding the New Physical Volume to the Volume Group
Add /dev/sdd1 to the existing volume group myvg.
[root@tng3-1 ~]# vgextend myvg /dev/sdd1
Volume group "myvg" successfully extended
[root@tng3-1]# pvs -o+pv_used
PV VG Fmt Attr PSize PFree Used
/dev/sda1 myvg lvm2 a- 17.15G 7.15G 10.00G
/dev/sdb1 myvg lvm2 a- 17.15G 15.15G 2.00G
/dev/sdc1 myvg lvm2 a- 17.15G 15.15G 2.00G
/dev/sdd1 myvg lvm2 a- 17.15G 17.15G 0
5.4.2.3. Moving the Data
Use the pvmove command to move the data from /dev/sdb1 to /dev/sdd1.
[root@tng3-1 ~]# pvmove /dev/sdb1 /dev/sdd1
/dev/sdb1: Moved: 10.0%
...
/dev/sdb1: Moved: 79.7%
...
/dev/sdb1: Moved: 100.0%
[root@tng3-1]# pvs -o+pv_used
PV VG Fmt Attr PSize PFree Used
/dev/sda1 myvg lvm2 a- 17.15G 7.15G 10.00G
/dev/sdb1 myvg lvm2 a- 17.15G 17.15G 0
/dev/sdc1 myvg lvm2 a- 17.15G 15.15G 2.00G
/dev/sdd1 myvg lvm2 a- 17.15G 15.15G 2.00G
5.4.2.4. Removing the Old Physical Volume from the Volume Group
After you have moved the data off /dev/sdb1, you can remove it from the volume group.
[root@tng3-1 ~]# vgreduce myvg /dev/sdb1
Removed "/dev/sdb1" from volume group "myvg"
You can now reallocate the disk to another volume group or remove the disk from the system.