Disk drive with fault detector for erase heads

Details Disk drive with fault detector for erase heads Disk drive with fault detector for erase heads

1996-03-22

2000-05-16

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 31, 360118, G11B 1502, G11B 1504

Patent

active

060645377

ABSTRACT:
A floppy disk drive comprises a read/write head and a pair of erase heads. The read/write head has a gap that extends across and beyond opposite edges of a track, while the gaps of the erase heads are aligned with each other and extend from the opposite edges of the track to create a pair of erased regions on opposite sides of the track. A wire circuit activates the read/write head in response to an output signal from a host system for recording signals along a sector of a track. An erase circuit activates the erase heads in response to the output of the host system for creating the erased regions along a length that corresponds to the sector. A fault detector is provided for detecting a potential developed by the erase heads to allow the write circuit to respond to the output of the host system when the potential is high and prevent the read/write head from responding to the output when the potential is low.

REFERENCES:
patent: 4318141 (1982-03-01), Haynes
patent: 4442463 (1984-04-01), Krishnamurty et al.
patent: 4542428 (1985-09-01), Yanagi
patent: 4613920 (1986-09-01), Higuchi et al.
patent: 4779146 (1988-10-01), Chuma et al.
patent: 4862304 (1989-08-01), Yunoki et al.
patent: 4901169 (1990-02-01), Hamaoka et al.
patent: 4914532 (1990-04-01), Ohashi et al.

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