Transcript Magnetic Storage Principles

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