I'm having disk problems on my laptop and I've just run HDTune which gave me this, which would explain the laptop being very slow and getting slower.
It's a bog standard 120GB 5400rpm drive in a Vostro 1700.
I'm also missing about 50GB of space, even after running the disk utils, so it's looking like an RMA, but I would like to compare it against your HDTune results if possible
ta.