Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2006-10-31
2008-08-12
Nguyen, Hoa T. (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S077120
Reexamination Certificate
active
07411759
ABSTRACT:
Systems, computer implemented methodology, and computer readable media for measuring position error signal differential nonlinearity in timing based servo patterns. A set of two or more reading heads, positioned at various locations along a servo stripe and orientated transverse to the longitudinal motion of the tape, collect PES data concerning servo stripes. A differential between the two reading heads is examined at various locations along the servo stripe of the servo pattern to ascertain differential PES data regarding an area of interests along the servo stripe. Examination of the differential data is thereafter conducted to isolate systematic PES readings from nonsystematic PES readings. The nonlinearity of the systematic PES readings at the various locations along the servo stripe is measured so as provide the ability to compensate for the nonlinear differential PES associated with the non-ideal shape of servo stripes.
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Hayworth Hubert O.
McKinstry Kevin D.
Trabert Steven G.
Habermehl James L
Hogan & Hartson LLP
Kubida William J.
Martensen Michael C.
Nguyen Hoa T.
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