Managing Disk Space with LVM -04

Adding A Hard Drive And Removing Another One

We haven't used /dev/sdf until now. We will now create the partition /dev/sdf1 (25GB) and add that to our fileserver volume group.

kilo:~#fdisk /dev/sdf

kilo:~# pvcreate /dev/sdf1
  Physical volume "/dev/sdf1" successfully created

Add /dev/sdf1 to our fileserver volume group:

kilo:~#:vgextend fileserver /dev/sdf1

kilo:~#:vgdisplay

That's it. /dev/sdf1 has been added to the fileserver volume group. Now let's remove /dev/sdb1. Before we do this, we must copy all data on it to /dev/sdf1

kilo:~# pvmove /dev/sdb1 /dev/sdf1
  /dev/sdb1: Moved: 1.9%
  . . .
  /dev/sdb1: Moved: 100.0%

Next we remove /dev/sdb1 from the fileserver volume group:

kilo:~# vgreduce fileserver /dev/sdb1
  Removed "/dev/sdb1" from volume group "fileserver"

kilo:~# vgdisplay
kilo:~#  pvremove /dev/sdb1 

kilo:~#  pvdisplay

You could now remove /dev/sdb from the system (if this was a real system and not a virtual machine).