Please at least add an option to update checksums anyway in exfatfsck about exfat HOT 12 CLOSED

would it be technically possible to implement an option to update the vbr checksum anyway in exfatfsck (it’s not about correcting errors, but just letting exfatfuse and other tools from other projects go while knowing risks)

Of course it's technically possible (though quite dangerous). But why is this better than teaching exfatfsck to fix errors?

vbr checksum‘s value is part of the data being checksummed, isn’t it ?

VBR checksum itself is not checksummed.

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@relan :VBR checksum itself is not checksummed. Ok, so it’s impossible for the vbr checksum to start at the first byte of a device partition ?

But why is this better than teaching  exfatfsck  to fix errors?

Currently, I need to test other implementations, and so far your tool seems to be the only open source one running in userspace.
So this is only for testing purpose, I have no data to rescue on an exfat volume.

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so it’s impossible for the vbr checksum to start at the first byte of a device partition ?

At the 1st byte of partition starts VBR. VBR checksum is located in 11th sector from the beginning of the partition. See verify_vbr_checksum() function. For testing you can just remove the check there.

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@relan :VBR checksum is located in 11th sector from the beginning of the partitionok, so it mean there’s a bug in the filesystem implementation I tested, I definitely need a tool to update checksums, please !

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Well, yesterday I've actually implemented VBR checksum repair in exfatfsck just to estimate how hard and ugly this would be. Check out repair branch.

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@relan : thanks, would it possible to get the same thing for node checksums ?

Of course, I only want to update checksums, not to modify any other things on the filesystem.

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would it possible to get the same thing for node checksums ?

Very busy right now, cannot promise anything.

I've splitted changes in the repair branch into 7 commits, so now it should be more obvious how to add new repair cases.

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I've implemented nodes checksums repairing. See repair branch.

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Closing as a duplicate of #3.

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how can I use the functionality? On ubuntu, even after installing directly from master, I only get exfatfsck 1.2.8, and if I read it correctly you added this in 1.3?

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how can I use the functionality? On ubuntu, even after installing directly from master, I only get exfatfsck 1.2.8

Did you configure fuse-exfat to be installed into /usr? It installs into /usr/local by default.

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ah well, it was not fuse-exfat, exfatfsck is part of exfat-utils. I now simply downloaded a deb from a later ubuntu version (https://packages.ubuntu.com/disco/exfat-utils) and installed it successfully 👍

finally I am able to change my sd-card id :P

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