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:
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-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).
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-n
-
Causes fsck_msdos to assume no as the answer to all operator questions, except “CONTINUE?”.
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-p
-
Preen the specified filesystems.
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-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.
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-y
-
Causes fsck_msdos to assume yes as the answer to all operator questions.
