* * * Master Disk from Rosenthal Engineering * * * Master Disk from Rosenthal Engineering prepares floppy diskettes used as masters for software duplication and distribution. Software duplicated from Master Disk prepared originals is more reliable and resistant to virus contamination. Master Disk examines the diskette and drive for flaws and errors, and verifies the quality and integrity as being suitable for use as the original master, fills unused sectors and boot tracks with special security code. Documentation includes extensive anti-virus test data using the comprehensive Rosenthal Engineering virus sample collection.