Mirage DSK-1 Manual page 7

Diskettes have a sliding write-protection tab so that you can protect your own sounds and
programs against accidental erasure. Sliding the write-protection tab in the lower left corner of
the diskette so that the window is closed will allow you to store information on the diskette.
Sliding the tab so that the window is open will protect the diskette against over-writing and
erasure. If you try to write, or "save" data to a protected diskette, the Mirage display will respond
"Pd", for Protected Diskette, and the data will not be saved. To save data to a protected diskette
you must first slide the tab to the closed position.
Diskettes are a magnetic storage medium and should be treated with the same care that you'd
give important audio tapes. Here are a few do's and don'ts.