I have a strange problem. My old Mac II vx will no longer write to a floppy, although it reads floppies just fine. For example, when I copy a file to a floppy, it will begin to write, but then it will fail half way through (I assume it fails when it performs the verify and realizes nothing was written). Similarly, if delete files, they appears to go to the trash, but when I eject and re-insert the floppy the files are back in their original location. It is obvious this is not caused by any problem with the write-protect, since the Mac would say "you can't write to a locked disk" or something.
My first thought was the floppy drive had gone bad, so I purchased a replacement, but it has the exact same problem. It may be coincidence, but this appears to have started around when I upgraded to System 7.5.3.
I have two 7.5.3 partitions (one was installed on top of 7.1, one was a clean install), both of which have the same symptoms. Any ideas? Is there a problem with the Mac II vx and 7.5.3? (Seems doubtful.) Any particular hardware problem that might cause this?
Thanks in advance!