Magnetic recording device

Details Magnetic recording device Magnetic recording device

2005-08-05

2008-08-26

Wellington, Andrea (Department: 2627)

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

C360S053000, C714S718000, C714S719000, C714S720000

Reexamination Certificate

active

07417814

ABSTRACT:
A magnetic recording device comprising a magnetic recording medium, a read-write channel for modulating write data, writing it on the magnetic recording medium, reading data from the magnetic recording medium, and demodulating the read data, and a processor for supplying the write data to the read-write channel and being supplied with the read data from the read-write channel. The processor supplies to the read-write channel a microdefect detection pattern having a first pattern for generating a consecutive magnetization inversion during writing and a second pattern for generating, during reading, a signal having a S/N ratio higher than the signal produced by the first pattern, the read-write channel modulates the microdefect detection pattern, writes it to the magnetic recording medium, reads the microdefect detection pattern, which was written, from the magnetic recording medium, and conducts abnormality detection of the microdefect detection pattern, which was read out.

REFERENCES:
patent: 4881136 (1989-11-01), Shiraishi et al.
patent: 6151180 (2000-11-01), Bang
patent: 6292913 (2001-09-01), Son

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