JPH0458848U - - Google Patents
Info
- Publication number
- JPH0458848U JPH0458848U JP9994590U JP9994590U JPH0458848U JP H0458848 U JPH0458848 U JP H0458848U JP 9994590 U JP9994590 U JP 9994590U JP 9994590 U JP9994590 U JP 9994590U JP H0458848 U JPH0458848 U JP H0458848U
- Authority
- JP
- Japan
- Prior art keywords
- protect
- circuit
- magnetic disk
- protect flag
- disk device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
第１図および第２図は本考案の一実施例を示す
磁気デイスク装置のブロツク図および磁気デイス
クのフオーマツト図である。
１……インターフエイス回路、２……リードラ
イトコントロール回路、３……書込回路、４……
リードライトヘツド、５……プロテクトフラグ回
路、６……読出回路、７……ライトプロテクト回
路、８……コントロール回路。
1 and 2 are a block diagram of a magnetic disk device and a format diagram of a magnetic disk, showing an embodiment of the present invention. 1...Interface circuit, 2...Read/write control circuit, 3...Write circuit, 4...
Read/write head, 5...protect flag circuit, 6...read circuit, 7...write protect circuit, 8...control circuit.
Claims (1)
ク、セクターにおいて、命令に従いプロテクトフ
ラグを書き込むプロテクトフラグ回路と、読み出
し時にプロテクトフラグを検出したデータ部分を
書き込み禁止とするライトプロテクト回路とを含
むことを特徴とする磁気デイスク装置のライトプ
ロテクト機構。 A magnetic disk device comprising: a protect flag circuit that writes a protect flag in accordance with a command in any cylinder, track, or sector of a magnetic disk device; and a write protect circuit that prohibits writing of a data portion for which a protect flag is detected during reading. Write protection mechanism for disk devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9994590U JPH0458848U (en) | 1990-09-25 | 1990-09-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9994590U JPH0458848U (en) | 1990-09-25 | 1990-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0458848U true JPH0458848U (en) | 1992-05-20 |
Family
ID=31842236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9994590U Pending JPH0458848U (en) | 1990-09-25 | 1990-09-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0458848U (en) |
-
1990
- 1990-09-25 JP JP9994590U patent/JPH0458848U/ja active Pending
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