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Magnetic Storage Principles ©Richard L. Goldman February, 2001 Disk Surface Random (non-aligned) magnetic particles Iron Oxide Coating Mylar, Aluminum, or Ceramic Substrate Read/Write Head Read/Write Head Coil Read/Write Head Read/Write Head Gap + – Voltage is applied and causing current to flow. Writing to Disk Current flowing through the windings induce a magnetic field in the read/write head The magnetic flux jumps the gap in the head and causes the magnetic particles to align
