发明名称 |
Assembly including a flexible disk and a diskdrive therefor. |
摘要 |
<p>Control information for a flexible magnetic desk storage assembky (41, 42) is recorded on the periphery of the disk (42) in a region not used for recording data. The control information is read through the protective cover or envelope (41) which encloses the disk by means of a magnetic transducer (25) such as a four track audia cassette head which bears against the envelope. By recording index and sector pulses as part of the control information, hard sectoring can be inexpensively and accurately achieved. A recorded fixed frequency control signal can be read and used as part of the feedback loop in a phase locked oscillator used to control a d.c. motor driving the spindle. The control information can also include servo tracks which assist in registering the data transducer directly over data tracks on media which has changed its dimensions.</p> |
申请公布号 |
EP0082337(A2) |
申请公布日期 |
1983.06.29 |
申请号 |
EP19820110826 |
申请日期 |
1982.11.23 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
KEIDL, STEVEN DENNIS;SHIDLER, KARL ALLEN |
分类号 |
G11B5/596;G11B5/012;G11B5/02;G11B19/12;G11B19/28;G11B21/10;G11B23/36;G11B23/42;G11B27/32;(IPC1-7):11B17/02;11B5/55;11B19/28 |
主分类号 |
G11B5/596 |
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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