How to Quickly and Easily Erase a Disk with dd

How to Quickly and Easily Erase a Disk with dd

• Boot an openSUSE ISO.

• Go to more.

• Select rescue system.

• Login as root (no password needed).

sudo dd if=/dev/zero of=/dev/sdX bs=1M status=progress oflag=direct

oflag=direct bypasses the OS cache, which can improve performance.