how do you delete phantom volumes

Apparently when my imac shut down it did not (or I did not) unmount a couple of ext drives and now I have phantom volumes which is totally messing up my backups....

Above is LS of /Volumes directory.. At this moment neither Master Data Backup or Master Data Backup-1 are connected.

I need to delete the entries to allow my backup software to be consistant.

Any thougths on how one might do this??

thx.

Marty

imac snow leapoad.

total 16

lrwxr-xr-x 1 root admin 1 May 8 18:53 Macintosh HD -> /

d--x--x--x+ 3 root admin 102 Feb 12 19:42 Master Data Backup

drwxr-xr-x+ 3 mpasetta admin 102 Apr 29 21:08 Master Data Backup-1

drwxrwxr-x 9 _unknown _unknown 374 May 2 09:57 Time Machine

lrwxr-xr-x 1 mpasetta admin 17 May 8 18:55 iDisk -> /Volumes/mpasetta

drwx------ 13 mpasetta staff 884 May 5 07:58 mpasetta