CD-ROM tray

[Shaggy Im-erbtham]

I cannot eject the tray of CD-ROM drive while in Slackware. To change CD's
I have had to go into DOS. 

The CDROM is already mounted, as excerpted from /etc/fstab as follows:
  /dev/hda1   ........ etc. 
   /dev/hdb     /cdrom   iso9660  ro 0 0

Can anybody suggest a solution? A command??
 
Thanks,
Shaggy