On 5/31/2017 1:36 PM, J Martin Rushton wrote: > Not relevant to this particular instance, but for domestic disks I keep > them (along with old credit cards, memory sticks etc) until I have the > garden incinerator going. With a good bright red firebed the disks > don't last long - some run out of the bottom as liquid aluminium. I'm > pretty certain even MI5/NSA won't get much off congealed Al! Personally, I'd be concerned with toxic fumes from such an incinerator. There's all kinda stuff in a drive, rare earth platings, plastics, and so forth. -- john r pierce, recycling bits in santa cruz