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exFAT filesystem userspace utilities

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exfatprogs/exfatprogs

 
 

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As new exfat filesystem is merged into linux-5.7 kernel, exfatprogs iscreated as an official userspace utilities that contain all of the standardutilities for creating and fixing and debugging exfat filesystem in linuxsystem. The goal of exfatprogs is to provide high performance and qualityat the level of exfat utilities in windows. And this software is licensedunder the GNU General Public License Version 2.

Building exfatprogs

Install prerequisite packages:

For Ubuntu:    sudo apt-get install autoconf libtool pkg-configFor Fedora, RHEL:    sudo yum install autoconf automake libtool

Build steps:

    cd into the exfatprogs directory:    ./autogen.sh    ./configure    make    make install

Using exfatprogs

- mkfs.exfat:    Build a exfat filesystem on a device or partition(e.g. /dev/hda1, dev/sda1).Usage example:    1. No option(default) : cluster size adjustment as per device size, quick format.        mkfs.exfat /dev/sda1    2. To change cluster size(KB or MB or Byte) user want        mkfs.exfat -c 1048576 /dev/sda1        mkfs.exfat -c 1024K /dev/sda1        mkfs.exfat -c 1M /dev/sda1    3. For full format(zero out)        mkfs.exfat -f /dev/sda1    4. For set volume label, use -l option with string user want.        mkfs.exfat -L "my usb" /dev/sda1    5. To change boundary alignment(KB or MB or Byte) user want        mkfs.exfat -b 16777216 /dev/sda1        mkfs.exfat -b 16384K /dev/sda1        mkfs.exfat -b 16M /dev/sda1- fsck.exfat:    Check the consistency of your exfat filesystem and optionally repair a corrupted device formatted by exfat.Usage example:    1. check the consistency.        fsck.exfat /dev/sda1    2. repair a corrupted device and create files in /LOST+FOUND, which have clusters allocated but not belonged to any files when reparing the device.        fsck.exfat -p -s /dev/sda1    3. repair a corrupted device in the same way above, but answering yes to all questions.        fsck.exfat -y -s /dev/sda1- tune.exfat:    Adjust tunable filesystem parameters on an exFAT filesystemUsage example:    1. print current volume label.        tune.exfat -l /dev/sda1    2. set new volume label.        tune.exfat -L "new label" /dev/sda1    3. print current volume serial.        tune.exfat -i /dev/sda1    4. set new volume serial.        tune.exfat -I 0x12345678 /dev/sda1- exfatlabel:    Get or Set volume label or serialUsage example:    1. get current volume label.        exfatlabel /dev/sda1    2. set new volume label.        exfatlabel /dev/sda1 "new label"    3. get current volume serial.        exfatlabel -i /dev/sda1    4. set new volume serial.        exfatlabel -i /dev/sda1 0x12345678- dump.exfat:    Show on-disk informationUsage example:    dump.exfat /dev/sda1- exfat2img:    Dump metadata of an exFAT filesystemUsage example:    exfat2img -o sda1.dump /dev/sda1

Benchmarks

Some fsck implementations were tested and compared for Samsung 64GB PromicroSDXC UHS-I Class 10 which was filled up to 35GB with 9948 directoriesand 16506 files by fsstress.

The difference in the execution time for each testing is very small.

Implementationversionexecution time (seconds)
exfatprogs fsck1.0.411.561
Windows fsckWindows 10 180911.449
exfat-fuse fsck1.3.068.977

Sending feedback

If you have any issues, please createissues or contact toNamjae Jeon andHyunchul Lee.Contributions are also welcome.

Contributor information

  • Please base your pull requests on theexfat-next branch.
  • Make sure you add 'Signed-Off' information to your commits (e.g.git commit --signoff).
  • Please check your code contribution using kernel dev-tool scriptcheckpatch.

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