I've been trying for a few days now to put to use a Seagate 1TB HDD, but I can't get it to show. Neither Windows 8.1 nor my Linux USB seem to detect it. Gparted, fdisk... tried all i could think of.
Then I tried SystemRescueCD, but I got an alert when trying to boot, that an unsafe drive was detected. Maybe I need to change some security settings?
Next was DBAN, as suggested by users on this site, to wipe whatever partitioning the drive currently has. But I couldn't get it to boot from USB DRIVE either. I tried Rufus and UUI, different methods, I bought and burned a CD, nothing, it just won't show up as bootable drive (I have no problem booting other distros or programs). Any ideas what's going on?
EDIT: The drive is connected as a second HDD and I'm booting from another.
EDIT2: USB = PENDRIVE