Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1991-04-15
1997-10-14
Huber, P. W.
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
360 13, G11B 509, G11B 2702
Patent
active
056779003
ABSTRACT:
In a data recording apparatus which sequentially records recording data on a magnetic tape (T), when a plurality of continuously recorded data files F(i) are rewritten into new data files F(I) having smaller data quantities, recording areas which remain without being rewritten into the new data files F(I) are rewritten into unrecorded areas NR containing no data. Further, when rewriting into new data files G(I) which have larger data quantities, reserve areas SP are provided, in which data has not been previously recorded, and overflow data is written into the reserve areas SP at the time of rewriting. Furthermore, when rewriting into a new data file H(I) having a larger quantity, in a case where the data file H(i+1) following the rewritten data file H(i) is not needed, the recording areas of the unnecessary data file H(i+1) which are not rewritten, are rewritten into a new data file H(I+1) having no data, or are rewritten into the above mentioned reserve areas SP belonging to a newly rewritten data file A(I).
REFERENCES:
patent: 4584616 (1986-04-01), Allen
patent: 4761693 (1988-08-01), Higashi et al.
patent: 4899232 (1990-02-01), Odaka et al.
Haikawa Yukihiko
Hosono Yukiharu
Minoda Hidenori
Nishida Syuzo
Okamoto Yoshihiro
Huber P. W.
Sharp Kabushiki Kaisha
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