LVM rocks!

I knew my persistence with using LVM would pay off one day. Despite the little mishap I had last year :-)

For a shiny new install of 64-bit Debian I chose to let the installer partition up my entire harddisk and instructed it to use LVM. This morning I noticed that the root partition was down to only 25% free space and during an upgrade it ran out of space. Not really a good thing. So, shut down the machine and out with the extra harddisk I’ve been putting off sticking in the machine. Here’s what I did after booting:

  1. Create a single large partition and make it of type Linux LVM (8e) using cfdisk.

  2. Prepare the new partition for use with LVM:

    # pvcreate /dev/sdb1
    
  3. Add the new ‘physical volume’ into the ‘virtual group':

    # vgextend mainvg /dev/sdb1
    
  4. Extend the ‘logical volume’ where root lives:

    # lvextend --extents +50%LV /dev/mainvg/root
    
  5. Then it turns out that Ext3 has no problem with extending a mounted filesystem so the last step was easy, but a little nerve wrecking since it was my root partition:

    # resize2fs /dev/mainvg/root
    

All done!

Share

One Comment

  1. Just a note about spreading a volume group over several disks: be careful that the volumes you create in this volume group are not spread over 2 disks, otherwise, if you lose one of the disks, you’ll lose the whole filesystem.

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>