I made a guide using Dell Data Wipe on my OptiPlex 7040/7050/7060 and XPS 9365:
- Dell Data Wipe UEFI BIOS (UEFI BIOS Touchscreen Optimised Version e.g. XPS Laptop – Written Guide)
- Dell Data Wipe UEFI BIOS (UEFI BIOS Non-Touch e.g. OptiPlex Desktop – Written Guide)
Also updated the Parted Magic Securely Wiping your Drives guide: