Add an explicit mounted-device check with findmnt, shorten confirmation prompts, and align the usage text and log wording with the current script name.
Add mounted/in-use device detection, show detailed device info before confirmation, and require an exact wipe phrase to proceed. Also move status output to stderr and refresh the usage warnings for clearer destructive-action guidance.
Add strict shell options, root and block-device validation, and a typed-device confirmation prompt before wiping. Preserve the fallback wipe sequence through secure discard, zero discard, and dd, while tightening error handling and keeping messages concise.
matmoul