@spinflip Try using recovery software like Recuva or WinHex. Best of luck. PS Always make backups. Boring but essential!
@iankenway I'll be trying that soon, and I have *most* of the files backed up but not quite all. But the larger thing I'm concerned about: what sort of failure mode wiped out 800gb of files without any warning, from what should have been a simple operation? And how often can I expect this to happen in future?
@iankenway turns out it was just a file system integrity issue, and fsck brought back everything with minimal effort.
@iankenway thank you, and I do semi-regularly! This one's a bit difficult, as it's a media box with a few TB of video that could all be replaced without *too* much effort if needed
@spinflip Glad to hear the good news but always make backups. Always! Best Ian