wipefs

Wipe filesystem, raid, or partition-table signatures from a device.

Display signatures for specified device:

sudo wipefs {{/dev/sdX}}

Wipe all available signatures for specified device:

sudo wipefs --all {{/dev/sdX}}

Perform dry run:

sudo wipefs --all --no-act {{/dev/sdX}}

Force wipe, even if the filesystem is mounted:

sudo wipefs --all --force {{/dev/sdX}}