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authorJinWang An <jinwang.an@samsung.com>2022-12-26 13:14:07 +0900
committerJinWang An <jinwang.an@samsung.com>2022-12-26 13:14:07 +0900
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-.\" fsck.fat.8 - manpage for fsck.fat
-.\"
-.\" Copyright (C) 2006-2014 Daniel Baumann <daniel@debian.org>
-.\"
-.\" This program is free software: you can redistribute it and/or modify
-.\" it under the terms of the GNU General Public License as published by
-.\" the Free Software Foundation, either version 3 of the License, or
-.\" (at your option) any later version.
-.\"
-.\" This program is distributed in the hope that it will be useful,
-.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
-.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-.\" GNU General Public License for more details.
-.\"
-.\" You should have received a copy of the GNU General Public License
-.\" along with this program. If not, see <http://www.gnu.org/licenses/>.
-.\"
-.\" The complete text of the GNU General Public License
-.\" can be found in /usr/share/common-licenses/GPL-3 file.
-.\"
-.\"
-.TH FSCK.FAT 8 2015\-05\-16 3.0.28 "dosfstools"
-.SH NAME
-\fBfsck.fat\fR \- check and repair MS\-DOS filesystems
-.\" ----------------------------------------------------------------------------
-.SH SYNOPSIS
-\fBfsck.fat\fR [\fIOPTIONS\fR] \fIDEVICE\fR
-.\" ----------------------------------------------------------------------------
-.SH DESCRIPTION
-\fBfsck.fat\fR verifies the consistency of MS\-DOS filesystems and optionally
-tries to repair them.
-.PP
-The following filesystem problems can be corrected (in this order):
-.IP "*" 4
-FAT contains invalid cluster numbers.
-Cluster is changed to EOF.
-.IP "*" 4
-File's cluster chain contains a loop.
-The loop is broken.
-.IP "*" 4
-Bad clusters (read errors).
-The clusters are marked bad and they are removed from files owning them.
-This check is optional.
-.IP "*" 4
-Directories with a large number of bad entries (probably corrupt).
-The directory can be deleted.
-.IP "*" 4
-Files . and .. are non\-directories.
-They can be deleted or renamed.
-.IP "*" 4
-Directories . and .. in root directory.
-They are deleted.
-.IP "*" 4
-Bad filenames.
-They can be renamed.
-.IP "*" 4
-Duplicate directory entries.
-They can be deleted or renamed.
-.IP "*" 4
-Directories with non\-zero size field.
-Size is set to zero.
-.IP "*" 4
-Directory . does not point to parent directory.
-The start pointer is adjusted.
-.IP "*" 4
-Directory .. does not point to parent of parent directory.
-The start pointer is adjusted.
-.IP "*" 4
-Start cluster number of a file is invalid.
-The file is truncated.
-.IP "*" 4
-File contains bad or free clusters.
-The file is truncated.
-.IP "*" 4
-File's cluster chain is longer than indicated by the size fields.
-The file is truncated.
-.IP "*" 4
-Two or more files share the same cluster(s).
-All but one of the files are truncated.
-If the file being truncated is a directory file that has already been read, the
-filesystem check is restarted after truncation.
-.IP "*" 4
-File's cluster chain is shorter than indicated by the size fields.
-The file is truncated.
-.IP "*" 4
-Clusters are marked as used but are not owned by a file.
-They are marked as free.
-.PP
-Additionally, the following problems are detected, but not repaired:
-.IP "*" 4
-Invalid parameters in boot sector
-.IP "*" 4
-Absence of . and .. entries in non\-root directories
-.PP
-When \fBfsck.fat\fR checks a filesystem, it accumulates all changes in memory
-and performs them only after all checks are complete.
-This can be disabled with the \fB\-w\fR option.
-.\" ----------------------------------------------------------------------------
-.SH OPTIONS
-.IP "\fB\-a\fR" 4
-Automatically repair the filesystem.
-No user intervention is necessary.
-Whenever there is more than one method to solve a problem, the least
-destructive approach is used.
-.IP "\fB\-A\fR" 4
-Use Atari variation of the MS\-DOS filesystem.
-This is default if \fBfsck.fat\fR is run on an Atari, then this option turns
-off Atari format.
-There are some minor differences in Atari format:
-Some boot sector fields are interpreted slightly different, and the special FAT
-entries for end\-of\-file and bad cluster can be different.
-Under MS\-DOS 0xfff8 is used for EOF and Atari employs 0xffff by default, but
-both systems recognize all values from 0xfff8...0xffff as end\-of\-file.
-MS\-DOS uses only 0xfff7 for bad clusters, where on Atari values 0xfff0...0xfff7
-are for this purpose (but the standard value is still 0xfff7).
-.IP "\fB-b\fR" 4
-Make read-only boot sector check.
-.IP "\fB\-d\fR \fIPATH\fR" 4
-Delete the specified file.
-If more than one file with that name exist, the first one is deleted.
-This option can be given more than once.
-.IP "\fB\-f\fR" 4
-Salvage unused cluster chains to files.
-By default, unused clusters are added to the free disk space except in auto mode
-(\fB\-a\fR).
-.IP "\fB\-l\fR" 4
-List path names of files being processed.
-.IP "\fB\-n\fR" 4
-No\-operation mode: non\-interactively check for errors, but don't write
-anything to the filesystem.
-.IP "\fB\-p\fR" 4
-Same as \fB\-a\fR, for compatibility with other *fsck.
-.IP "\fB\-r\fR" 4
-Interactively repair the filesystem.
-The user is asked for advice whenever there is more than one approach to fix an
-inconsistency.
-This is the default mode and the option is only retained for backwards
-compatibility.
-.IP "\fB\-t\fR" 4
-Mark unreadable clusters as bad.
-.IP "\fB\-u\fR \fIPATH\fR" 4
-Try to undelete the specified file.
-\fBfsck.fat\fR tries to allocate a chain of contiguous unallocated clusters
-beginning with the start cluster of the undeleted file.
-This option can be given more than once.
-.IP "\fB\-v\fR" 4
-Verbose mode.
-Generates slightly more output.
-.IP "\fB\-V\fR" 4
-Perform a verification pass.
-The filesystem check is repeated after the first run.
-The second pass should never report any fixable errors.
-It may take considerably longer than the first pass, because the first pass may
-have generated long list of modifications that have to be scanned for each disk
-read.
-.IP "\fB\-w\fR" 4
-Write changes to disk immediately.
-.IP "\fB\-y\fR" 4
-Same as \fB\-a\fR (automatically repair filesystem) for compatibility with other
-fsck tools.
-.\" ----------------------------------------------------------------------------
-.SH "EXIT STATUS"
-.IP "0" 4
-No recoverable errors have been detected.
-.IP "1" 4
-Recoverable errors have been detected or \fBfsck.fat\fR has discovered an
-internal inconsistency.
-.IP "2" 4
-Usage error.
-\fBfsck.fat\fR did not access the filesystem.
-.\" ----------------------------------------------------------------------------
-.SH FILES
-.IP "fsck0000.rec, fsck0001.rec, ..." 4
-When recovering from a corrupted filesystem, \fBfsck.fat\fR dumps recovered data
-into files named 'fsckNNNN.rec' in the top level directory of the filesystem.
-.\" ----------------------------------------------------------------------------
-.SH BUGS
-Does not create . and .. files where necessary.
-Does not remove entirely empty directories.
-Should give more diagnostic messages.
-Undeleting files should use a more sophisticated algorithm.
-.\" ----------------------------------------------------------------------------
-.SH SEE ALSO
-\fBfatlabel\fR(8)
-.br
-\fBmkfs.fat\fR(8)
-.\" ----------------------------------------------------------------------------
-.SH HOMEPAGE
-The home for the \fBdosfstools\fR project is its
-.UR https://github.com/dosfstools/dosfstools
-GitHub project page
-.UE .
-.\" ----------------------------------------------------------------------------
-.SH AUTHORS
-\fBdosfstools\fR were written by
-.MT werner.almesberger@\:lrc.di.epfl.ch
-Werner Almesberger
-.ME ,
-.MT Roman.Hodek@\:informatik.\:uni-erlangen.de
-Roman Hodek
-.ME ,
-and others.
-The current maintainer is
-.MT aeb@\:debian.org
-Andreas Bombe
-.ME .