发明名称 |
Recording disk having read-only recording area and writable recording area and a driving apparatus therefor |
摘要 |
A record disk has a read-only track area and a writable track area in which a guard band of a sufficient width is formed between such two areas for prevention of erroneous writing into the read-only track area during data writing into the writable track area. Apparatus using such disk employs a pair of heads with opposite azimuth angles and erasing of a track is first checked to prevent a read-only track from being erased. During such track erasing, a track recorded by a head with one azimuth is erased by a head with the other azimuth. |
申请公布号 |
US4942486(A) |
申请公布日期 |
1990.07.17 |
申请号 |
US19880214121 |
申请日期 |
1988.06.30 |
申请人 |
SONY CORPORATION |
发明人 |
KUTARAGI, KEN;TANAKA, SHOJI;FUJINAMI, YASUSHI |
分类号 |
G11B5/012;G11B5/48;G11B7/007;G11B11/105;G11B19/02;G11B19/04;G11B20/12;G11B20/18;G11B27/13;G11B27/30 |
主分类号 |
G11B5/012 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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