From: Lucifer <LuciferMorningstar@bigpond.com>

I have a Denon DMD-M10 minidisk recorder that will not play disks
recorded on other machines nor will it record on a disk that has been
used before. I was able to record on an unused disk which does play.
--- NewsGate v1.0 gamma 2
* Origin: News Gate @ Net396 -Huntsville, AL - USA (1:396/4)

From: Ruaraidh <arg-arjf@ehnenvqu.hx.REMOVEthis>

Lucifer wrote:

I have a Denon DMD-M10 minidisk recorder that will not play disks
recorded on other machines nor will it record on a disk that has been
used before. I was able to record on an unused disk which does play.

Just in case - are you sure the write-protect switches on the other discs are set to recordable, not write-protected? :-)
--- NewsGate v1.0 gamma 2
* Origin: News Gate @ Net396 -Huntsville, AL - USA (1:396/4)