for reading them on a PC only Anadisk works. For the disks I dumped I used an old 486 and DOS 6.22. But a common clone won't work. Basically the more proprietary and specialized (i.e. shitty) the PC is (especially the floppy controller) the more luck you will have being able to read the disk. alternatively I recall Charles made a program to read the S24 disks to check the existing dumps using a System 24 board hooked up like I did.... http://guru.mameworld.info/sega-security/sega_security.html The program may write the disks too?