Epson Endeavor - Manual (Page 25)

5.25-inch drive/diskette compatibility
If you write to this diskette in a 1.2MB drive, you may not be able to read it
or write to it in a 360KB drive later.
Because of possible incompatibilities, always indicate the
diskette type and density when you label your diskettes.
(Usually this information appears on the manufacturer’s label.)
Note
If you want to format a 720KB diskette in a l&MB drive or a
360KB diskette in a 1.2MB drive, make sure you include the
correct parameter in your format command. See your
operating system manual for instructions.
If you have any combination of the above drives (1 &MB,
1.2MB, 720KB, or 360KB) and you are using MS-DOS, you can
copy files from one drive to another-using COPY or
XCOPY-as long as the correct diskette type is in each drive.
You can also use these commands to copy files between a hard
disk and any type of diskette. However, you cannot use the
MS-DOS DISKCOPY command to copy from one diskette drive
to another if the two drives are not the same type. For more
information, see your operating system manuals.
Using Your Computer 1-9