not documented option of admin commands

here we collect some not documented options sometime useful. The list actually is not ordered properly by topic just “as it is”

• Identify “old” owner:
  select * from volhistory where volume_name='<NAME>'

• Delete volhistory entry by giving the name of the volume:
  del volhist type=remote volume=<NAME> tod=+0 force=yes

• remove all tapes with a certain patter from volhistory using a bash shell on the libman' config folder,
  e.g. remove all LTO5 tapes on a LibMan called lm101:

    for i in $(grep "Volume Name" volhist.dat | grep "L5" | cut -f 2 -d '"')
    do 
      echo "lm101: del volhist type=remote volume="$i" tod=+0 force=yes"
    done
    lm101: del volhist type=remote volume=HU2194L5 tod=+0 force=yes
    lm101: del volhist type=remote volume=HU2195L5 tod=+0 force=yes
    lm101: del volhist type=remote volume=HU2135L5 tod=+0 force=yes
    lm101: del volhist type=remote volume=HU2138L5 tod=+0 force=yes