Piru/N7VQM: I think I know where he's getting his facts confused re: rotation speed - floppy drives. Everyone (with a brain) knows that Amiga floppy drives (like our "sister" - the Mac) use variable speed floppy drives, unlike PC's which are fixed at 300rpm.
The part about low-level formatting a drive is just plain wrong. EVERY manufacturer of hard disk storage solutions state that it shouldn't be done at all by the end user since it's already taken care of at the factory. They typically follow with disclaimers about how you can damage your hardware, etc.
The ONLY thing that's remotely considered "platform specific" about hard disk storage would be how it's filesystem formatted, not low-levelled, since the latter has NOTHING to do with any platform whatsoever.
DoomMaster: No offense, but if you doubt a word of what Piru, N7VQM, or I've said... by all means, try the following test: Begin a low-level format of a drive you could care less about then simulate a power outtage by killing power to the computer. I can guarantee you that drive will be dead, even to low-level SCSI commands, no matter if you put it in a PC (with a SCSI adapter), Mac, or Amiga.
Once again, only try this experiment with a harddrive you can afford to kill, since you certainly WILL kill it.
