[linux-lvm] File Descriptor left open message

["Reuben Budiardja" <reubendb organizedhacks com>]

Hello,
I used to have LVM on my machine to combine the capacity of a hard drive and a 
partition on a different drive as one volume group. I had problem with one of 
the disk but I was able to remove all the data of the computer, and replace 
the disk, and add another disk

Now I want to start over and create LVM again. However, I keep getting this 
message: 
# vgdisplay 
File descriptor 128 left open
File descriptor 129 left open
  No volume groups found
# pvdisplay 
File descriptor 128 left open
File descriptor 129 left open

What does this mean ? Also, in /etc/lvm I found archive/ and backup/ directory 
which seems to refer to my old LVM, and also .cache. Are they safe to 
remove ?

Thank you for any help.
RDB