I'm thinking of building a case where the hardrives are mounted vertically but I'm not sure if that would be safe on the harddrives...anyone know if it's an issue or not?
Mounting harddrives vertically seems to work just as fine as mounting them horizontally. As for CD-Drives, some like it, others don't. My current one is mounted on a 45 degree slope. It works just fine; however, my car's cd player doesn't like the audio cds anymore.
Then again, I haven't taken the time to find out if it's the cd player, drive, or cds. I'm willing to bet it's the cd player, though, for other reasons.