I currently have an HP Compaq dc7600 sff computer that has fedora 24 installed with grub on it (which is not the OS it comes with). I'm trying to install Windows Server on it, so I burned Windows server to a DVD+R DL 8.5GB disc, put it in the Disc Drive, which by the way, is a generic HP CD/DVD-ROM disc drive, and went into the bios boot menu (F9) and booted from CDROM Drive, which is a valid and listed option. I have also tried the setup menu (F10) and changed the boot order. Instead of booting to the windows server installation media, it hangs at the blinking underscore (
__) symbol for a while then continues to grub on the hard drive
If I try the same thing but with a USB instead of a DVD, it just skips it and loads grub instead.
If I disable booting from the hard drive from the setup menu (F10) or unplug the hard drive SATA cable and then try to boot from either the USB or DVD, it just tells me:
Non-System disk or disk error Replace and press any key when ready
Pressing any key displays the same message.
I know the boot media works, and just in case it's not compatible with windows server or dual layer DVDs, I even tried a fedora workstation live media on a regular DVD+R, which is the same OS it's running yet the same thing happens. The disc drive even has the DVD-ROM symbol on it, so I know it's compatible, and there must have been some way to install fedora 24 on it in the first place (I'm not the one who installed fedora).
Is there some other compatibility issue I've missed? Even under device settings in the bios, it lists the correct name of the DVD and the USB. Do I need to burn the installation media in a certain way? What can I do so that it boots from the DVD?