Incorrect super block--help!

[freebsd-stable at auscert.org.au]

> Hey, newb BSDer here with a question
> 
> I've got a brand new 5.4 install.  I'm trying to mount the CDROM.  As root, 
> I type:
> 
> mount /dev/acd0 /cdrom
> 
> and I get "incorrect super block" error message after a bit of CD activity, 
> and no mount.  I've tried a CD-RW I burned (the FreeBSD install disk I 
> installed from) and an old copy of SimCity 2000, neither worked, same error 
> message.
> 
> I'm stuck.  Any ideas?

The drive could have just started to fail. Sounds unlikely, but it's the
kind of error you might see. Does it work with another OS, or can you
substitute another drive and try that way?

joel