just a curiosity, more or less
Have you ever needed to change some just bought original floppies at time, ie going back to the games shop to return them?
Luckily, it happended just one time in my case
Mortal Kombat, disk 1 (well, they changed only the first one)
it did not work on my old ks1.2 1MB A500
now i'm wondering if the changed disk was not damaged, but just an ECS release...