Be aware that ImageDisk does NOT to any operating system compatible file system format.
ImageDisk was designed to do anything that was possible on the PC floppy controller, mainly for the purpose of archiving and restoring as many as possible of the various disks that were used on (ptr-PC) classic systems.
So, ImageDisk does NOT "know about" any particular OSs file system format.
The ImageDisk Format function performs only a low-level format of the disk - no operating system will recognize the freshly formatted disk.
The format function exists mainly to help in testing, and to prepare disks for images being written by a tool that does not do formatting as it
writes.
You could try the "erase" function - note that the NEC 765 FDC used in a PC does not have the capability to completely remove sector data.
ImageDisk "fakes" an erase by initiating a format with an sector size that cannot "fit" - resulting in sector data that won't be recognized as "valid" by other tools.
If you can find one I recommend you use a "bulk tape eraser" to completely unformat a disk - this is a strong electromagnet which alternately reverses the magnetic domains on the disk.
You activate it, run it over the disk, and pull it well away before deactivating - that way there won't be an abnormal amount of aligned domains.
(If you can't find one, and you are comfortable "building stuff" - you could make one, just a suitable mains powered transformer driving a suitable coil of wire)
Dave ::: https://dunfield.themindfactory.com ::: "Daves Old Computers"->Personal