CentOS - Feb 2011 - Insert the second CD of an install

Using CentOS 5.5 x86_64.

I am trying to install software that comes on two discs. I can start the
install just fine, but when it comes to taking out the first disc and
putting in the second, the system won't let me eject it.

I remember reading something on the internet once about something needing to
be enabled to allow this to work, but I can't find it now. Does anybody have
a clue as to what I might be looking for?

(Yes, the work around is to just mount both ISOs and not use real discs at
all, but as administrator I understand that process and my users won't.
However, they are familiar with the process of inserting disks.)

Thanks!

---
Mike VanHorn
Senior Computer Systems Administrator 
College of Engineering and Computer Science
Wright State University
265 Russ Engineering Center
937-775-5157
michael.vanhorn at wright.edu
RSS: http://www.engineering.wright.edu/~mvanhorn/MikeVanHorn'sNewsFeed.xml
http://www.engineering.wright.edu/~mvanhorn/

On 02/15/11 1:03 PM, Mike VanHorn wrote:
> Using CentOS 5.5 x86_64.
>
> I am trying to install software that comes on two discs. I can start the
> install just fine, but when it comes to taking out the first disc and
> putting in the second, the system won't let me eject it.
you typically have to umount the volume before you can eject the disk.  
and of course to umount it, noone can have any open files on it.