I don't think that would make the floppy LED stay on. The floppy drive should be plugged into the very end of the cable, the end with the twist on most computers.
If it's an IDE drive it should not have been low-level formatted. That will destroy the partitions, including the maintenance partition, and may have actually ruined the drive. Or do you mean a DOS-level format of a partition (C:)? A:\>fdisk C: and display the partition info.