Device for processing file data with erasing identification data
AssigneesSony Corporation, Fujitsu Limited
InventorsDaijirou Okihara, Yukio Taniyama
Life of this patent
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Abstract
A data recording/reproducing device updates the identification data for identifying the recording data of recording track on the magnetic tape as the meaningless data. As a result, in a data recording reproducing device to be used for, such as an external memory device of the computer, the desired data can be erased easily.
Claims6
A device for processing prescribed file data for serial recording in a plurality of file data helical recording tracks on a magnetic tape, comprising:
- first recording means for recording identification data in each of said file data helical recording tracks for identifying the file data recorded in said file data recording track;
- and
- first updating means for selectively updating said identification data in a file data recording track with erasing identification data in response to an external erasing command, whereby said erasing identification data indicates that the file data in said file data recording track is meaningless data.
A device for processing file data for serial recording in a plurality of helical file data recording tracks on a magnetic tape, comprising:
- recording means for recording identification data in each of said file data recording tracks for identifying the file data recorded in said file data recording track;
- updating means for selectively updating said identification data in a file data recording track with erasing identification data in response to an external erasing command, whereby the updated erasing identification data indicates that the file data in said file data recording track is meaningless data;
- reproducing means for reproducing said file data from said file data recording tracks on said magnetic tape;
- detecting means for detecting the presence of said erasing identification data in said reproduced file data recording tracks;
- and
- supplying means for selectively supplying to a host device said reproduced file data from successive file data recording tracks until said erasing identification data is detected, whereupon any file data subsequently reproduced from subsequent file data recording tracks is disregarded as meaningless data.
Dependencies are inferred from the claim text.