One of them was, the other one wasn't but well protected (?!).
I guess this is the only explanation for what happened.
I opened both to check and on the first one the "head" was stuck right in the middle of the disk.
The second one the read was stuck all the way off the disk to the right.
Both have that "click"noise going every second.
I guess the best way is to keep back ups inside the PC 24hs spinning???