Method for reducing time loss during manufacture of hard...

Details Method for reducing time loss during manufacture of hard... Method for reducing time loss during manufacture of hard...

2007-05-01

2007-05-01

Sniezek, Andrew L. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S069000, C702S051000

Reexamination Certificate

active

11329745

ABSTRACT:
A method is presented for reducing time loss during manufacture and testing of a hard disk drive by predicting reduction in gas fill. The method includes using servo tracking error to obtain a measured value of insitu non-repeatable runout (NRRO) for the hard disk drive, the hard disk drive having been filled with the gas and semi-sealed. The measured value of NRRO is then deconvolved into a plurality of values for flow induced NRRO components. These values of NRRO and of flow induced NRRO components are compared to predetermined limiting values and a time when one of the predetermined limiting values will be reached is predicted. Action is then applied as appropriate.

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