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I have an external HDD (15 TB) that I use as a backup storage. Usually I perform the command

rsync -aluv /mylocalfolder /mytargetfolder

to save my data. But this time Linux sets the file system to "read-only" during the rsync process.

Output from dmesg is:

[ 2247.831348] exFAT-fs (sdc2): error, found bogus dentry(64528) beyond unused empty group(64526) (start_clu : 37895, cur_clu : 173924) [ 2247.831351] exFAT-fs (sdc2): Filesystem has been set read-only

Then I tried to fix the file system error with (sdc2 refers to the drive with corrupted file system):

sudo fsck.exfat -p /dev/sdc2

However, the answer I received was:

exfatprogs version : 1.1.0 failed to get stream dentry. 0 /dev/sdc2: checking stopped. directories 11500, files 676064 /dev/sdc2: files corrupted 1, files fixed 0

So I have no idea how to proceed. I want to avoid setting up the whole file system again, because it would take days to copy all the data to the HDD again. More information about my system:

Linux: 5.10.0-21-amd64 fsck: fsck from util-linux 2.36.1

Any advice on how to fix this error and avoid it in the future is appreciated. Many thanks in advance.

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  • Remove the -p flag and try the fsck again please Commented Oct 4, 2024 at 8:57
  • umount the ExFAT filesystem before you fsck the device. Commented Oct 4, 2024 at 16:37

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