yh i looked on my harddrive , Unfortunately you cant microwave these ,oven cook only.... i had to put it on gass mark 6 for 20-25 mins depending on how cripsy i liked my platters.............................. (this is a joke and doesnt condone putting a harddrive in the oven))
my personal view is that , if he is that cautious about data on the hard drive then driving a few nails threw it and smashing it with a hammer is perfect. Data gone, new harddrive is the best option .ITS 1000 TIMES cheaper for new harddrive, You can get 1tb for next to nothing compared to pro wiping.
IF IN DOUBT. GET THE HAMMER OUT
IF ITS A WIN, THEN THROW IT IN THE BIN
(dont ask where that random rhyme came from) :O