du Options -a Automatically repair the system; do not prompt the user. -A Use the Atari version of the MS-DOS filesystem. -d file Drop the named file from the file allocation table. Force checking, even if kernel has already marked the filesystem as valid. dosfsck will normally exit without checking if the system appears to be clean. -l file Consult file for a list of bad blocks, in addition to checking for others. -n Ensure that no changes are made to the filesystem. When queried, answer "no." -p "Preen." Repair all bad blocks noninteractively. -t Display timing statistics. -v Verbose.