3utools Checking Filesystem

fsck.hfsplus: HFS file system consistency check

  1. 3utools Checking File System
  2. 3utools Checking File System

Command to display fsck.hfsplus manual in Linux: $ man 8 fsck.hfsplus

Note The Sfcdetails.txt file contains details from every time that the System File Checker tool has been run on the computer. The file includes information about files that were not repaired by the System File Checker tool. Verify the date and time entries to determine the problem files that were found the last time that you ran the System File Checker tool. Description: Clean Flash IPSW + DFU Mode Using 3utools English Version: Clean Flash IPSW + DFU Mode Using 3utools 1. Connect your iDevice using Original Ca.


fsck.hfsplus - HFS file system consistency check


fsck.hfsplus-q3utools checking file system[-df]special ..
fsck.hfsplus-p[-df]special ..
fsck.hfsplus[-n y r][-dfgxlE][-D flags][-b size][-
B path][-m mode][-c size][-R flags]special ..


Thefsck.hfsplusutility verifies and repairs standard HFS and HFS+ file systems.

The first form offsck.hfsplusquickly checks the specified file systems to determine whetherthey were cleanly unmounted.

The second form offsck.hfspluspreens the specified file systems.It is normally started byfsck(8)run from/etc/rc.bootduring automatic reboot, when a HFS file system is detected.When preening file systems,fsck.hfspluswill fix common inconsistencies for file systems that were notunmounted cleanly.If more serious problems are found,fsck.hfsplusdoes not try to fix them, indicates that it was notsuccessful, and exits.

The third form offsck.hfspluschecks the specified file systems and tries to repair alldetected inconsistencies.

If no options are specified fsck.hfspluswill always check and attempt to fix the specified file systems.

The options are as follows:

-c size
Specify thesize of the cache used by fsck.hfsplusinternally. Bigger size can result in better performance but can result in deadlock whenused with -l option. Size can be specified as a decimal, octal, or hexadecimal number. If the number ends with a ``k', ``m', or ``g', the number is multiplied by 1024 (1K), 1048576 (1M),or 1073741824 (1G), respectively.
Display debugging information.This option may provide useful information when fsck.hfspluscannot repair a damaged file system.
-D flags
Print extra debugging information. Theflagsare a bitmap that control which kind of debug information is printed.The following values are currently implemented:
fsck.hfsplusto check and repair journaled HFS+ file systems.
Causesfsck.hfsplusto generate its output strings in GUI format.This option is used when another application with a graphical user interface(like Mac OS X Disk Utility) is invoking thefsck.hfsplustool.
Causesfsck.hfsplusto generate its output strings in XML (plist) format. This optionimplies the-goption.
Lock down the file system and perform a test-only check.This makes it possible to check a file system that is currently mounted,although no repairs can be made.
-m mode
Mode is an octal number that will be used to set the permissions for thelost+found directory when it is created.The lost+found directory is only created when a volume is repaired and orphanedfiles or directories are detected.fsck.hfsplusplaces orphaned files and directories into the lost+found directory (locatedat the root of the volume).The default mode is 01777.
Preen the specified file systems.
Causesfsck.hfsplusto quickly check whether the volume was unmounted cleanly.If the volume was unmounted cleanly, then the exit status is 0.If the volume was not unmounted cleanly, then the exit status will be non-zero.In either case, a message is printed to standard output describing whether thevolume was clean or dirty.
Always attempt to repair any damage that is found.

3utools Checking File System

Never attempt to repair any damage that is found.
Causefsck.hfsplusto exit (with a value of 47) if it encounters anymajor errors. A ``major error' is considered one whichwould impact using the volume in normal usage; an inconsistencywhich would not impact such use is considered ``minor' for thisoption. Only valid with the-noption.

3utools Checking File System

-R flags
Rebuilds the requested btree. The following flags are supported:

Rebuilding a btree will onlywork if there is enough free space on the file system for the new btreefile, and iffsck.hfsplusis able to traverse each of the nodes in the requested btree successfully.Rebuilding btrees is not supported on HFS Standard volumes.

Rebuild the catalog btree. This is synonymous with-Rc

Because of inconsistencies between the block device and the buffer cache,the raw device should always be used.


fsck.hfsplusindicates some status by exit value. The current list of exit status resultsis:
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