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Created October 16, 2020 22:10
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  1. @scottopell scottopell renamed this gist Dec 25, 2016. 1 changed file with 0 additions and 0 deletions.
    0 README.md → fix_exfat_drive.md
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  2. @scottopell scottopell revised this gist Dec 25, 2016. 1 changed file with 2 additions and 2 deletions.
    4 changes: 2 additions & 2 deletions README.md
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    @@ -4,9 +4,9 @@ with exFAT formatting will randomly get corrupted.
    Disk Utility is unable to repair this at first, but the fix is this:

    1. Use `diskutil list` to find the right drive id.
    a. You want the id under the IDENTIFIER column, it should look like `disk1s1`
    1. You want the id under the IDENTIFIER column, it should look like `disk1s1`
    2. Run `sudo fsck_exfat -d <id from above>`. eg `sudo fsck_exfat -d disk1s3`
    a. `-d` is debug so you'll see all your files output as they're processed.
    1. `-d` is debug so you'll see all your files output as they're processed.
    3. Answer `YES` if it gives you the prompt `Main boot region needs to be updated. Yes/No?`
    4. Open Disk Utility and you should be able to repair here successfully.

  3. @scottopell scottopell created this gist Dec 25, 2016.
    18 changes: 18 additions & 0 deletions README.md
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    @@ -0,0 +1,18 @@
    exFAT support on macOS seems to have some bugs because my external drives
    with exFAT formatting will randomly get corrupted.

    Disk Utility is unable to repair this at first, but the fix is this:

    1. Use `diskutil list` to find the right drive id.
    a. You want the id under the IDENTIFIER column, it should look like `disk1s1`
    2. Run `sudo fsck_exfat -d <id from above>`. eg `sudo fsck_exfat -d disk1s3`
    a. `-d` is debug so you'll see all your files output as they're processed.
    3. Answer `YES` if it gives you the prompt `Main boot region needs to be updated. Yes/No?`
    4. Open Disk Utility and you should be able to repair here successfully.

    See the apple man page below for details on the `fsck_exfat` utility.

    Sources/Extra Reading:
    https://developer.apple.com/legacy/library/documentation/Darwin/Reference/ManPages/man8/fsck_exfat.8.html
    https://craigsmith.id.au/2014/07/06/repairing-a-corrupted-mac-osx-exfat-partition/
    https://discussions.apple.com/thread/4154638?tstart=0