Repeatable runout determination within a rotating media...

Details Repeatable runout determination within a rotating media... Repeatable runout determination within a rotating media...

2005-01-25

2005-01-25

Tran, Sinh (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

06847502

ABSTRACT:
A rotating media storage device (RMSD) includes a disk having at least one track with a plurality of servo wedges, a moveable head, and a microprocessor. The microprocessor receives a plurality of position error signal (PES) values during track following and sums PES values for a plurality of different sets of servo wedges of the track to generate a plurality of shifted summed position error signal (SSPES) values. The microprocessor shifts the plurality of generated SSPES values by a phase shift value to generate a plurality of corrected shifted summed position error signal (CSSPES) values, which correspond to the repeatable runout (RRO) of the disk.

REFERENCES:
patent: 5402280 (1995-03-01), Supino
patent: 5867340 (1999-02-01), Morehouse et al.
patent: 5995317 (1999-11-01), Ottesen
patent: 6381292 (2002-04-01), Yamakoshi
patent: 6751042 (2004-06-01), Bi et al.

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