🚀 go-pugleaf

I'm sure this topic may have been raised before in this forum, but I am new to
the group & would appreciate any help. My FDHD drive in my Mac 11cx sometimes
tells me that my attempts at initialization have failed. Yet I can take the
same disk, swing over to my DOS machine and format it perfectly! I've even
heard of a couple of cases where [people have been using a correctly formatted
disk, only to have the drive tell them it is an unreadable disk and do they
want to format it, etc. - thereby losing all of their data. In other words, the
disk becomes unreadable.
Questions:
          1) What causes this
          2) Any "fixes" out there