# Atari ST family Atari ST disks are standard MFM encoded IBM scheme disks without an IAM header. Disks are typically formatted 512 bytes per sector with between 9-10 (sometimes 11!) sectors per track and 80-82 tracks per side. For some reason, occasionally formatting software will put an extra IDAM record with a sector number of 66 on a disk, which can horribly confuse things. The Atari profiles below are configured to ignore these. Be aware that many PC drives (including mine) won't do the 82 track formats. ## Options (no options) ## References - [Atari ST Floppy Drive Hardware Information](https://info-coach.fr/atari/hardware/FD-Hard.php) by Jean Louis-Guerin - [Atari ST Floppy Drive Software Information](https://info-coach.fr/atari/software/FD-Soft.php) by Jean Louis-Guerin