Reference Guide - Hard Disk Drives  A Brief History of the Hard Disk Drive Construction and Operation of the Hard Disk Drive Hard Disk Operational Overview Hard Disk Platters and Media Hard Disk Read/Write Heads Read/Write Head Operation Read/Write Head Technologies Ferrite Heads Metal-In-Gap (MIG) Heads Thin Film (TF) Heads (Anisotropic) Magnetoresistive (MR/AMR) Heads Giant Magnetoresistive (GMR) Heads Colossal Magnetoresistive (CMR) Heads Hard Disk Head Sliders, Arms and Actuator Hard Disk Spindle Motor Hard Disk Connectors and Jumpers Hard Disk Logic Board Hard Disk Cache and Cache Circuitry Hard Disk Form Factors Hard Disk Packaging and Mounting Hard Disk Geometry and Low-Level Data Structures Hard Disk Performance, Quality and Reliability Hard Disk BIOS and Capacity Factors Hard Disk Interfaces and Configuration Hard Disk Logical Structures and File Systems Author: Charles M. Kozierok  Now that new giant magnetoresistive (GMR) heads are taking over the market, engineers have turned their attentions to the next breakthrough that will take hard disk read heads to the next level of performance. One of the designs being researched is an evolutionary advance based on GMR that has been dubbed by some as colossal magnetoresistive or CMR. At this stage this technology is in the early stages of investigation, and I have not been able to find much information on it. It would be logical to assume that it involves using slightly different materials than GMR in an effort to further increase sensitivity. When I find more information on CMR I'll add it here. Next: Hard Disk Head Sliders, Arms and Actuator

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