cdrom not valid block device?

[Peter Christensen]

Thanks for the help in setting up /etc/fstab.  I think I've gotten a
little farther along.  I added a line to fstab as follows:

  /dev/cdrom /cd iso9660 ro,user,noauto,unhide

Now when I type 

  mount /cd

I get the following message:

  mount:  /dev/cdrom is not a valid block device

I wonder if my cdrom drive is not compatible?  I think what I have is
just a standard drive, IDE.

Peter Christensen