[Coco] disk drive/controller formatting question

[Bob Devries]

OK, guys, a curly question:

Brian has a FD-500 controller with two Matsushita JA-551 drives. He can read disks no problem, but formatting fails at track 17. This is under Disk Basic.
HOWEVER, formatting under disk basic works fine!
What is different about the OS9 formatting that it will format disks ok, but disk basic won't? He's using standard Radio Shack issued OS9 Level 2.

Any clues?

--
Regards, Bob Devries, Dalby, Queensland, Australia

Isaiah 50:4 The sovereign Lord has given me
the capacity to be his spokesman,
so that I know how to help the weary.