I'm getting close to my wits end ... I embarked on a project to catalog and archive all of the 5.25 inch floppies that I used on my PCjr. For archiving floppies I decided to use savedskf and loaddskf (IBM utils), which run under DOS and OS/2. I used a Pentium class machine with a true 360KB diskette drive in the machine. I specified to savedskf that I wanted raw, uncompressed binary images of the diskettes. (The raw binary images are exactly size of the diskettes (360KB), and are exactly the same as images created using Linux's 'dd' command, so I know that they are really raw binary images.) All of the diskettes (150+) read fine, and are now sitting as files on my hard drive. I decided to do some spot checking of the diskette images, so I created new diskettes from the images. First problem: loaddskf will NOT write my 360KB images to a real 360KB diskette drive. It complains about an unsupported drive type. If I let savedskf write it's meta data and do compression, then loaddskf will work. However, I want raw binary images for compatibility with Linux 'dd. I can get around it; there are lots of programs that can write the raw diskette images. (fdwrite, fdimage, rawrite) However, I am completely annoyed. Second problem: I have two PCjrs for testing, and neither of the two can read the diskettes created on my big machine. The diskettes are being created using a real 360KB diskette drive, yet they are barely readable in the two PCjrs. (They are usually completely unreadable.) I'm going to swap the 360KB diskette drive out of the Pentium class machine and put another one there. Hopefully that drive is out of alignment or the belts are loose, and that is why the other two PCjrs can't read diskettes created on it. Question 1: What the heck is up with loaddskf? Has anybody run into problems with it when dealing with raw binary images? It's supposed to work ... :-) Question 2: Is there diagnostic software for determing the alignment and RPMs of a diskette drive? I vagely remember CopyIIPC telling me the rotational speed of the diskette drive as it copied ... is there a diagnostic program that can do this? Question 3: What can I do to improve the chances of these diskettes being interchangeable between systems? I've cleaned the drive heads with a Q-Tip and isopropyl alcohol. I've also cleaned the drive rails to ensure that the head can move smoothly. Neither have helped. Thanks, Mike