Richter wrote:
Can it be of any importance what's on the drive now? I believe it's an NTFS-partition on it... I still believe HDTools would "see" the drive and be able to low-level format right?
@Richter,
At least you're up and running power wise and you can use your system now. Okay, next step.
The 2.5" IDE interface on the A1200 supplies power for a 2.5" drive to run without having to connect any additional leads (just like in any generic laptop). If you get the cable the wrong way around then +5v is going to be fed into the wrong pin somewhere.
You report the drive works perfectly okay in a PC? If so we've narrowed the problem down slightly.
You should see the drive showing in your HDTools menu as a SCSI device as the firmware on the drive will display the manufacturer information.
The link between the drive and the Amiga is the IDE cable and IDE interface. If a PC recognises the drive then one of these has to be playing up.
Oh, and one last thing. Whatever you do, don't run a low level format of the drive. You'll kill it!