So tried to resurrect an external HDD this afternoon. I dropped it from waist height to carpet. When I plugged it into the laptop I was greeted with the bleep sound of the read arm motor initialising and not being able to reset the arm position. I thought read arm is stuck just needs moving. When I plugged it back in after removing the case & moving arm back to the edge of the platter. The arm did move & the drive span up however it just seeked for 5mins. & went into power save not mounting.