On Tue, 2011-06-28 at 09:30 -0400, Steve Campbell wrote: > Mr. Heron was so kind to make a suggestion that I should use disk images > to install VMs. Upon further thought, I kinda like the idea. So I > re-read the manual and google a little, and discover I still don't know > what should be in these disk images. > > Should I copy the contents of the CDs to a file or what? I've got a test > server at the moment with Centos 5.5 and xen installed as the host OS, > but have just downloaded the 5.6 CD ISOs along with the DVD ISO, so > I'll use 5.6 for my VMs. I've read about how I can create an image from > something that already exists. > > Again, any clarity would be appreciated. Just put the ISO's in /var/lib/xen/images and point at them. If you didn't download the discs, you can rip them using: dd if=/dev/<optical device> of=/var/lib/xen/images/<name of disc> For example, if ripping the first 5.6 CD... dd if=/dev/hdc of=/var/lib/xen/images/CentOS-5.6-i386-d1.iso I generally rip a disc multiple times and then do a file compare to make sure I've got a reasonable chance of having an undamaged copy. Keep in mind that it isn't as easy to change discs when you are using images on a paravirtual machine. I still recommend setting up a local repository as a much better solution because it allows you to take a snapshot so multiple installs use the exact same versions of everything.