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Repairing bad sectors in an external drive
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this post was submitted on 21 Apr 2024
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If you can’t check smart data over usb, plug it up to something internal.
Use the command badblocks -o sus_blocks.txt /dev/your_drive to make a file of your bad blocks. Be 100% sure you’re running bad blocks on the correct drive. Then partition with fdisk or whatever and use mkfs.ext4 -l sus_blocks.txt /dev/your_device to make a file system on there that knows about the bad blocks you found.
Make 100% sure you’re doing those operations on the target drive.
I checked that this still works using a drive with bad blocks last night. I did not check if mkfs.exfat supports that list though.