The4 DOS/XE manual is the bible for the XF-551 disk drive, period end of story.
Atari Owner's if you need an manual for what ever reason, don't hesitate to buy one.
The purpose of any good manual is to guide you through the steps required to accomplish the mission of that program. The Manual for the XF-551 disk drive is special above many other Dos manuals.
If you are using a XF-551 disk drive I would highly recommend that you get the proper manual such as the DOS XE. DOS is the proper term for Disk-Operating-System.
Verified purchase: Yes