Looks like I have another dead hard disk, with another 230GB of data probably gone. It’s possible that I can get it off, but right now I have nowhere to put it, and buying another disk was not high on my list of priorities. It seems like hard disks are the biggest money sink in my life right now, and there is seething involved.
Update: and of course, 2 minutes after posting this, I get the acrid smell of burnt electronics filling my living room. So much for data recovery.