The CDROM image was a firmware upgrade image from Dell (based on Linux). Mounting the image with iDRAC, it worked nicely. As one of the Servers had a dying iDRAC (Dell R320), I needed an USB stick.

I created a bootable USB stick using an Ubuntu 8.10 live CD and the (manual) instructions shown at this guide. This worked great. However, what I'd really like to do is create a multi-booting version ...

Now that Windows 11 is out, you might be internally debating whether to make the leap now, wait a bit for it to mature, or stick with Windows 10 (or whatever OS you are currently using) for the long ...