Various embodiments of the present invention provide systems and methods for determining fly-height adjustments. For example, various embodiments of the present invention provide storage devices that include a storage medium, a read/write head assembly disposed in relation to the storage medium (278), and a SAM based fly-height adjustment circuit (214). The storage medium (278) includes a plurality of servo data regions (110) that each include a servo address mark (154). The SAM based fly-height adjustment circuit (214) receives the servo address mark (154) from the plurality of servo data regions (110) via the read/write head assembly (276), and calculates a first harmonics ratio (445) based on the received data. The first harmonics ratio (445) is compared with a second harmonics ratio (450) to determine an error (365) in the distance (295) between the read/write head assembly (276) and the storage medium (278).

Title
Systems and Methods for Fly-Height Control Using Servo Address Mark Data
Application Number
12/663336
Publication Number
20100177430
Application Date
October 27, 2008
Publication Date
July 15, 2010
Inventor
Viswanath Annampedu
Schnecksville
PA, US
Jeffrey P Grundvig
Loveland
CO, US
Hongwei Song
Longmont
CO, US
Yuan Xing Lee
San Jose
CA, US
George Mathew
San Jose
CA, US
Agent
Hamilton DeSanctis & Cha
CO, US
IPC
G11B 21/02
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