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:
- Use
diskutil list
to find the right drive id. - You want the id under the IDENTIFIER column, it should look like
disk1s1
- Run
sudo fsck_exfat -d <id from above>
. egsudo fsck_exfat -d disk1s3
-d
is debug so you'll see all your files output as they're processed.- Answer
YES
if it gives you the promptMain boot region needs to be updated. Yes/No?
- 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
Hi @scottopell, thanks, I tried this method, the result was:
** Checking volume.
** Checking main boot region.
fsck_exfat: Invalid jump or signature
Main boot region is invalid. Trying alternate boot region.
** Checking alternate boot region.
fsck_exfat: Invalid jump or signature
Alternate boot region is invalid.
** The volume could not be verified completely.
Any idea what might be wrong, how could I fix this? Thanks in advance, att