Magnetic disk drive with diagnosis of error-correcting retries

Details Magnetic disk drive with diagnosis of error-correcting retries Magnetic disk drive with diagnosis of error-correcting retries

2005-01-27

2009-02-03

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S053000, C714S705000

Reexamination Certificate

active

07486458

ABSTRACT:
Embodiments of the invention relate to diagnosing error-correcting retries of an upper system by using a disk drive under control of the upper system. In one embodiment, a microprocessor can operate in any of at least two operation modes. One is normal operation mode while the other is pseudo failure operation mode. Mode switching is made by a switch. Strictly, the pseudo failure operation mode includes three different operation modes: 1) pseudo logical error report mode in which a pseudo logical error is reported to the upper system without performing disk control; 2) pseudo component circuit failure mode in which a control circuit is forced to cause a failure by setting invalid control values to the control circuits; and 3) pseudo interface failure mode in which a pseudo interface failure in the system comprising multiple disk drives is reported by setting an invalid control value to the interface control circuit.

REFERENCES:
patent: 6189051 (2001-02-01), Oh et al.
patent: 7042664 (2006-05-01), Gill et al.
patent: 2003/0011917 (2003-01-01), Bliss et al.
patent: 10-011227 (1998-01-01), None
patent: 2002-132534 (2002-05-01), None
patent: 2002-189571 (2002-07-01), None
patent: 05-073446 (2003-03-01), None

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