Copyright (C) 1995 Wolfgang Solfrank
Copyright (c) 1995 Martin Husemann
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.Dd April 11, 2010 .Dt FSCK_MSDOS 8 .Os .Sh NAME .Nm fsck_msdos .Nd DOS/Windows (FAT) filesystem consistency checker .Sh SYNOPSIS .Nm .Fl p .Op Fl f .Ar filesystem ... .Nm .Op Fl fny .Op Fl x Ar snap-backup .Ar filesystem ... .Sh DESCRIPTION The .Nm utility verifies and repairs .Tn FAT filesystems (more commonly known as .Tn DOS filesystems).
p The first form of .Nm preens the specified filesystems. It is normally started by .Xr fsck 8 run from
a /etc/rc during automatic reboot, when a FAT filesystem is detected. When preening file systems, .Nm will fix common inconsistencies non-interactively. If more serious problems are found, .Nm does not try to fix them, indicates that it was not successful, and exits.
p The second form of .Nm checks the specified file systems and tries to repair all detected inconsistencies, requesting confirmation before making any changes.
p The options are as follows: l -tag -width XxXsnapXbackupXX t Fl f This option is ignored by .Nm , and is present only for compatibility with programs that check other file system types for consistency, such as .Xr fsck_ffs 8 . t Fl n Causes .Nm to assume no as the answer to all operator questions, except .Dq CONTINUE? . t Fl p Preen the specified filesystems. t Fl x Ar snap-backup Use a snapshot with .Ar snap-backup as backup to check a read-write mounted filesystem. Must be used with .Fl n . See .Xr 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. t Fl y Causes .Nm to assume yes as the answer to all operator questions. .El .Sh SEE ALSO .Xr fss 4 , .Xr fsck 8 , .Xr fsck_ffs 8 , .Xr mount_msdos 8 .Sh BUGS .Nm is still under construction.