but the same problem is on another drive...
The tutorials from the links are great!
I see that you are new to this, it's common practice.
psychological warfare against stoopid hardware:
disassembling it a few times really scares it, but you may also want to have a mallet or large hammer handy and start singing something like "How would I love to smash this stoopid thingy with this large hammer I happen to have here" to the tune of your preferred song.
The effect is that usually things start working again .....
A chainsaw has also proved to be a very good intimidating method, but it's a bit noisy and hardware won't fall for it if it isn't running.