About: http://webisa.webdatacommons.org/235513969

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In accordance with the principles of the present invention, information, such as timing information and servo-patterns, is written on the surfaces of one or more of magnetic disks 12 by using internal recording heads 14.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com