NEC CP/M-86 - Page 216

CBIOS Error Messages
H-2
When a write-protected diskette
is selected, the following message is displayed.
*** This floppy on x : is the write protected floppy ***
x = drive name of selected drive (A-D)
This
is not an error, but is a warning not to attempt to write to the disk. If a
write
operation is attempted to a write-protected diskette, the FDC H/W
error message is returned.