blkdiscard Discards device sectors on storage devices. Useful for SSDs. Discard all sectors on a device, removing all data: blkdiscard /dev/{{device}} Securely discard all blocks on a device, removing all data: blkdiscard --secure /dev/{{device}} Discard the first 100MB of a device: blkdiscard --length {{100MB}} /dev/{{device}}