Mounting a logical volume from a volume group

I normally don't use logical volumes (just another layer between me and the disk..), but one day I had to mount one on a spare harddisk that I had hooked up to my main machine.

Some pointers:

• lvdisplay shows you the available volume groups
• if it only says "No volume groups found", run lvmdiskscan first
• if the one you want to mount is labelled
  not available
  use:
  vgchange -ay VolGroup00
  (replace with the name of the group you want to use)
• to mount:
  mount /dev/VolGroup00/LogVol00 /mnt/temp
  (again, replace with volume you want to mount, and put your desired mount point instead of /mnt/temp)

Another path to a successful mount, this time on Fedora 13. I had invalid entries in my /etc/fstab after having removed a second IDE harddisk, and had to boot from the Fedora 13 CD ROM to be able to edit it. Then (as root):

• vgchange -ay
  which gave:
  3 logical volume(s) in volume group "vg_kryten" now active
  (obviously it most likely will show a different group name on your system)
• ls -l /dev/vg_kryten
  which gave:
  lv_home → ../dm-3
  lv_root → ../dm-2
  lv_swap → ../dm-4
• I wanted to mount the root partition, so:
  mount /dev/vg_kryten/lv_root ./temp
  (./temp a temporary mount point created with mkdir ./temp)