fsck_msdosfs8
Dos/windows (fat) file system consistency checker
Usage
fsck_msdosfs -p
[-BCf]
filesystem ...
fsck_msdosfs [-BCMny]
filesystem ...
Overview
The fsck_msdosfs utility verifies and repairs FAT file systems (more commonly known as DOS file systems).
The first form of fsck_msdosfs preens the specified file systems. It is normally started by fsck(8) run from /etc/rc during automatic reboot, when a FAT file system is detected. When preening file systems, fsck_msdosfs will fix common inconsistencies non-interactively. If more serious problems are found, fsck_msdosfs does not try to fix them, indicates that it was not successful, and exits.
The second form of fsck_msdosfs checks the specified file systems and tries to repair all detected inconsistencies, requesting confirmation before making any changes.
The options are as follows:
-
-B -
Ignored for fsck(8) compatibility.
-
-C -
Ignored for fsck(8) compatibility.
-
-F -
Compatibility with the wrapper fsck(8) which seeks to determine whether the file system needs to be cleaned immediately in foreground, or if its cleaning can be deferred to background. FAT (MS-DOS) file systems must always be cleaned in the foreground. A non-zero exit code is always returned for this option.
-
-M -
Causes
fsck_msdosfsto not use mmap(2) when checking a FAT32 file system. This option is mainly for debugging purposes and is not normally necessary. Thefsck_msdosfsutility will automatically fall back to use a simple LRU cache of 4 MiB when it failed to perform mmap(2), or when-Mis specified. -
-f -
Force
fsck_msdosfsto check “clean” file systems when preening. -
-n -
Causes
fsck_msdosfsto assume “no” as the answer to all operator questions, except “CONTINUE?”. -
-p -
Preen the specified file systems.
-
-y -
Causes
fsck_msdosfsto assume “yes” as the answer to all operator questions.
Releases
65 releases since FreeBSD 4.4-RELEASE; the text changed 39 times.
- 4.4–4.7
- 4.8–4.11
- 5.0–5.1
- 5.2–5.2.1
- 5.3–5.5
- 6.0–6.3
- 6.4
- 7.0
- 7.1
- 7.2
- 7.3
- 7.4
- 8.0
- 8.1
- 8.2
- 8.3
- 8.4
- 9.0
- 9.1
- 9.2
- 9.3
- 10.0
- 10.1
- 10.2
- 10.3
- 10.4
- 11.0
- 11.1
- 11.2
- 11.3
- 11.4
- 12.0
- 12.1
- 12.2
- 12.3
- 12.4
- 13.0–13.2
- 13.3–14.2
- 14.3–14.5
- 15.0–16.0
-B since FreeBSD 15.0-RELEASE;
-C since FreeBSD 7.3-RELEASE;
-M since FreeBSD 12.2-RELEASE.