Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1989-03-30
1991-01-08
Psitos, Aristolelis M.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 66, 360 69, 360121, 360 75, G11B 1920, G11B 509
Patent
active
049841033
ABSTRACT:
A method for writing and reading for a floppy disc drive using a read/write head having a high density read/write gap and a low density read/write gap and a memory buffer. The method includes reading requested data and data ahead of the requested data from the disc and then storing the read data ahead of the requested data in a look-ahead memory buffer. Data stored in the look-ahead memory buffer is then read, instead of from the disc, when the next requested data is the same as the data stored in the memory buffer. There is no movement of the disc until reading of the data stored in the memory buffer is completed or until other data is requested that is needed directly from the disc. The above method reduces power consumption and provided an improved higher rate of read/write operation for a floppy disc drive that is particularly useful in a portable computer.
REFERENCES:
patent: 4584617 (1986-04-01), Libove et al.
patent: 4644421 (1987-02-01), Miwa et al.
patent: 4805051 (1989-02-01), DeMarco et al.
Fujitsu America, Inc.
Garland Steven R.
Psitos Aristolelis M.
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