[yoz-y]

> I need to securely wipe data off the disk, because I'm selling the computer or something. Just deleting the master encryption key contained on the disk is probably enough to render the whole thing unreadable. I don't need to spend days using special software to overwrite all sectors multiple times.

From what I have read, on any reasonably recent drive (made in last two decades or so) a one time random pass is plenty fine.

[Terribledactyl]

That might be, but the main point here was that it's way faster. Do you want to destroy a few MBs per drive or a few TBs?