badblocks finally is done

Checking for bad blocks in read-write mode
From block 0 to 3907018582
Testing with pattern 0xaa: done
Reading and comparing: done
Testing with pattern 0x55: done
Reading and comparing: done
Testing with pattern 0xff: done
Reading and comparing: done
Testing with pattern 0x00: done ) Reading and comparing: done
Pass completed, 0 bad blocks found. (0/0/0 errors)

Took around 60 hours, for a 4 TB external hard drive. Maybe 62, it doesn’t say how long it took, after it’s done.

Can’t sleep, so waited for it to finish.

rclone says around 6 hours to copy everything from the first drive, then I have to format it, and copy everything back.

Why does it copy four files at a time?