On Tue, Jan 10, 2017 at 10:10:42AM +0000, Chris Green wrote:
> > Otherwise, I'm out of ideas.
> >
> So am I, I'm copy all the files of the drive and I'm going to re-make
> the file systems.
>

... and now, 16 hours later I'm seeing some errors.

I've run 'mkfs.ext4 -c -c /dev/sdb1 and on the *second* pass I'm
seeing some errors.  The first 0xAA pass got no errors but the pass
that's running now, writing 0x55, is getting some errors.  So,
presumably, that's what the problem is.  However it's strange that
nothing else was showing any errors, SMART reported nothing at all and