Ok. You said file with error has disappeared from the system. Is that
still the case? If there anything you need to "recover"? If file with
error is already gone, then you should have no more errors while reading
the drive to backup it.


On 20/08/2023 13:24, Longhao.Chen wrote:
Thanks for your reply.

The disk is a 1TB Samsung SSD with less than 4TiB written, the SMART is 
completely normal with no errors. I suspect that this error may have been 
caused by random bit flipping in the memory (DDR4 non-ECC memory).

I just want to fix the checksum error (because the file with the checksum error 
is not important), so I used the command 'btrfs check --init-csum-tree'.

于 2023年8月20日 GMT+08:00 下午8:12:31, piorunz <[email protected]> 写到:
On 20/08/2023 12:11, Longhao.Chen wrote:
Thanks for your reply. I previously read in the btrfs documentation that "when 
repairing the file system, it is advisable to choose a newer kernel", so I used 
Ubuntu's livecd for the repair.

First of all, did you found the cause of this unrepairable error?
Is HDD failing? What SMART data say?
You should not repair or use medium which is failing, it may cause
further damage.

--
With kindest regards, Piotr.

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--
With kindest regards, Piotr.

⢀⣴⠾⠻⢶⣦⠀
⣾⠁⢠⠒⠀⣿⡁ Debian - The universal operating system
⢿⡄⠘⠷⠚⠋⠀ https://www.debian.org/
⠈⠳⣄⠀⠀⠀⠀

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