exfatprogs创建、修复和调试exfat文件系统的实用工具

## exfatprogs As new exfat filesystem is merged into linux-5.7 kernel, exfatprogs is created as an official userspace utilities that contain all of the standard utilities for creating and fixing and debugging exfat filesystem in linux system. The goal of exfatprogs is to provide high performance and quality at the level of exfat utilities in windows. And this software is licensed under the GNU General Public License Version 2. ## Building exfatprogs Install prerequisite packages: ``` For Ubuntu: sudo apt-get install autoconf libtool pkg-config For 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 and fix.(preparing) - tune.exfat: Adjust tunable filesystem parameters on an exFAT filesystem Usage 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 serial Usage 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 information Usage example: dump.exfat /dev/sda1 ``` ## Benchmarks Some fsck implementations were tested and compared for Samsung 64GB Pro microSDXC UHS-I Class 10 which was filled up to 35GB with 9948 directories and 16506 files by fsstress. The difference in the execution time for each testing is very small. | Implementation | version | execution time (seconds) | |----------------------|-----------------|--------------------------| | **exfatprogs fsck** | 1.0.4 | 11.561 | | Windows fsck | Windows 10 1809 | 11.449 | | [exfat-fuse fsck] | 1.3.0 | 68.977 | [exfat-fuse fsck]: https://github.com/relan/exfat ## Sending feedback If you have any issues, please create [issues][1] or contact to [Namjae Jeon](mailto:linkinjeon@kernel.org) and [Hyunchul Lee](mailto:hyc.lee@gmail.com). [Contributions][2] are also welcome. [1]: https://github.com/exfatprogs/exfatprogs/issues [2]: https://github.com/exfatprogs/exfatprogs/pulls ## Contributor information * Please base your pull requests on the `exfat-next` branch. * Make sure you add 'Signed-Off' information to your commits (e. g. `git commit --signoff`).