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FSCK_MSDOS(8) FreeBSD System Manager's Manual FSCK_MSDOS(8) NAME fsck_msdos - DOS/Windows (FAT) filesystem consistency checker SYNOPSIS fsck_msdos -p [-f] filesystem ... fsck_msdos [-fny] [-x snap-backup] filesystem ... DESCRIPTION The fsck_msdos utility verifies and repairs FAT filesystems (more commonly known as DOS filesystems). The first form of fsck_msdos preens the specified filesystems. It is normally started by fsck(8) run from /etc/rc during automatic reboot, when a FAT filesystem is detected. When preening file systems, fsck_msdos will fix common inconsistencies non-interactively. If more serious problems are found, fsck_msdos does not try to fix them, indicates that it was not successful, and exits. The second form of fsck_msdos checks the specified file systems and tries to repair all detected inconsistencies, requesting confirmation before making any changes. The options are as follows: -f This option is ignored by fsck_msdos, and is present only for compatibility with programs that check other file system types for consistency, such as fsck_ffs(8). -n Causes fsck_msdos to assume no as the answer to all operator questions, except "CONTINUE?". -p Preen the specified filesystems. -x snap-backup Use a snapshot with snap-backup as backup to check a read-write mounted filesystem. Must be used with -n. See fss(4) for more details. The point is to check an internally-consistent version of the filesystem to find out if it is damaged; on failure one should unmount the filesystem and repair it. -y Causes fsck_msdos to assume yes as the answer to all operator questions. SEE ALSO fss(4), fsck(8), fsck_ffs(8), mount_msdos(8) HISTORY A fsck_msdos utility appeared in NetBSD 1.2. BUGS fsck_msdos is still under construction. FreeBSD 14.1-RELEASE-p8 September 11, 2016 FreeBSD 14.1-RELEASE-p8