Hard-disk drive, method of controlling the hard-disk drive,...

Details Hard-disk drive, method of controlling the hard-disk drive,... Hard-disk drive, method of controlling the hard-disk drive,...

2011-07-26

2011-07-26

Wong, K. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

07986486

ABSTRACT:
A hard-disk drive. The hard-disk drive includes a magnetic-recording disk having a plurality of tracks formed thereon. The hard-disk drive also includes a magnetic-recording head configured to be positioned over a target track selected from the plurality of tracks and configured to write data to and to read data from the target track. Moreover, the hard-disk drive includes a range-definer configured to define an allowed range of a position error of the magnetic-recording head corresponding to the target track. In addition, the hard-disk drive includes a write-enabler configured to determine whether writing data by the magnetic-recording head is allowed based on the position error of the magnetic-recording head with respect to the target track and the allowed range that is calculated from data read out by the magnetic-recording head.

REFERENCES:
patent: 6724562 (2004-04-01), Ang et al.
patent: 7133237 (2006-11-01), Ikeda et al.
patent: 7242551 (2007-07-01), Kurihara et al.
patent: 7245447 (2007-07-01), Zaitsu
patent: 7417821 (2008-08-01), Tsuchinaga
patent: 7529058 (2009-05-01), Hara et al.

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