JPH03178004A - Magnetic disk medium - Google Patents
Magnetic disk mediumInfo
- Publication number
- JPH03178004A JPH03178004A JP31716389A JP31716389A JPH03178004A JP H03178004 A JPH03178004 A JP H03178004A JP 31716389 A JP31716389 A JP 31716389A JP 31716389 A JP31716389 A JP 31716389A JP H03178004 A JPH03178004 A JP H03178004A
- Authority
- JP
- Japan
- Prior art keywords
- servo information
- sectors
- magnetic disk
- servo
- cylinder
- 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
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
本発明は磁気ディスク媒体に関し、特にゾーンビットレ
コーディング方式の磁気ディスク媒体に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a magnetic disk medium, and more particularly to a zone bit recording type magnetic disk medium.
従来技術
高トラツク密度を実現するために、サーボ専用面を用い
ず、その代りにデータ面内にサーボ情報エリア（サーボ
セクタ）を設け、そのサーボ情報を用いてシーク動作や
位置決め動作を行うセクタサーボ方式の磁気ディスク装
置が増加している。Conventional technology In order to achieve high track density, a sector servo method was developed in which a servo information area (servo sector) was provided within the data surface instead of using a dedicated servo surface, and the servo information was used to perform seek and positioning operations. Magnetic disk devices are increasing.
一方、記録容量の増大を図るために、磁気ディスクの外
側と内側の記録トラック速度を変化させ、ディスク面上
のビット密度を略均一化するゾーンビットレコーディン
グ方式が磁気ディスク装置に採用されつつある。この場
合、１セクタ当りのビット数は固定（固定セクタ）であ
るので、磁気ディスクの外側と内側とでは、１トラック
当りのセクタ数が変化することになる。On the other hand, in order to increase the recording capacity, a zone bit recording method is being adopted in magnetic disk drives, in which the recording track speeds on the outside and inside of the magnetic disk are changed to substantially equalize the bit density on the disk surface. In this case, since the number of bits per sector is fixed (fixed sector), the number of sectors per track changes between the outside and inside of the magnetic disk.
この様なゾーンビットレコーディング方式を採用した磁
気ディスク媒体に対して、セクタサーボを採用する場合
、各シリンダに応じてセクタ数が相違しているので、各
セクタ毎にサーボｆｆｆ報を書込むと、サーボ情報エリ
アがディスク半径方向に連続した位置に整列しなくなる
。よって、サーボ情報の読取り処理が困難になる。この
サーボ情報としては、磁気ヘッドの位置を知るためのシ
リンダ情報をコード化したグレーコードや、ヘッド位置
ずれ検出用オフセットパターンが書込まれており、この
サーボ情報を読取ることが困難になれば、セクタサーボ
の制御が不可能になってしまうという欠点がある。When sector servo is used for a magnetic disk medium that uses such a zone bit recording method, the number of sectors differs depending on each cylinder, so if servo fff information is written for each sector, the servo Information areas are no longer aligned in consecutive positions in the disk radial direction. Therefore, reading processing of servo information becomes difficult. As this servo information, a gray code that encodes cylinder information to know the position of the magnetic head and an offset pattern for detecting head position deviation are written, and if it becomes difficult to read this servo information, There is a drawback that sector servo control becomes impossible.
発明の１−１的
そこで、本発明はこの様な従来のものの欠点を角ｒ（決
すべくなされたものであって、その目的とするところは
、サーボ情報の読取りを容易に維持しつつセクタサーボ
とゾーンビットレコーディングとを併用した磁気ディス
ク媒体を堤供することにある。1-1 of the Invention Therefore, the present invention has been made to solve the drawbacks of the conventional ones by improving the angle r (r), and its purpose is to easily maintain the readability of servo information while also improving the sector servo. An object of the present invention is to provide a magnetic disk medium that is used in combination with zone bit recording.
発明の構成
本発明によれば、データ面上のビット密度を略均一化す
るゾーンビットレコーディング方式の磁気ディスク媒体
であって、前記データ向において、複数の半径線上に放
射状にサーボ情報エリアを設け、前記サーボ情報エリア
に挾まれた各データエリア内のセクタ数をシリンダ位置
に応じて変化させるように記録してなる磁気ディスク媒
体が得られる。Structure of the Invention According to the present invention, there is provided a zone bit recording type magnetic disk medium that substantially uniformizes the bit density on the data surface, wherein servo information areas are provided radially on a plurality of radial lines in the data direction, A magnetic disk medium is obtained in which the number of sectors in each data area sandwiched between the servo information areas is recorded so as to vary depending on the cylinder position.
実施例
以下に本発明の実施例を図面を参照しつつ詳細に説明す
る。Embodiments Below, embodiments of the present invention will be described in detail with reference to the drawings.
第１図は本発明の実施例のデータ面の記録態様を示す図
であり、第２図は第１図のデータ面の１部拡大図である
。図に示す如く、各データ面におけるサーボ情報エリア
１はデータ面の複数のＩＦ、径線上に族１１状に書込ま
れてなるものである。FIG. 1 is a diagram showing a recording mode of a data surface according to an embodiment of the present invention, and FIG. 2 is a partially enlarged view of the data surface of FIG. 1. As shown in the figure, the servo information area 1 on each data surface is written in a group 11 shape on a plurality of IFs and radials of the data surface.
そして、これ等サーボ情報エリア１の間に挾まれたデー
タエリアには整数個のセクタ３が設けられており、この
セクタ数はシリンダ位置に応じて変化するようになって
いる。An integral number of sectors 3 are provided in the data area sandwiched between these servo information areas 1, and the number of sectors changes depending on the cylinder position.
丈際の磁気ディスク媒体では、シリンダ数は数百以上／
ｆ在しているが、ここでは説明を開路化するために、０
〜８の９シリンダの場合を図示している。そして、放り
・■状のサーボ情報エリアの間には、０〜２シリンダま
では各シリンダ当り６セクタｒｒ： ｒｒＬ、３〜５シ
リンダでは各シリンダ当り４セクタ存ｎ二し、６〜８シ
リンダでは、各シリンダ首り３セクタ存往するようにな
っている。For long-length magnetic disk media, the number of cylinders is several hundred or more.
f exists, but here we use 0 to simplify the explanation.
The case of 9 cylinders of 8 to 8 is illustrated. Then, between the servo information areas in the shape of a square, there are 6 sectors for each cylinder from 0 to 2 cylinders, 4 sectors for each cylinder for 3 to 5 cylinders, and 4 sectors for each cylinder for 6 to 8 cylinders. , each cylinder has three sectors.
この様に、サーボ情報エリアに挾まれたデータエリア内
のセクタ数を゛Ｉ′−径方向すなわちシリンダ位置に応
じて変化させるように記録することにより、データのビ
ット密度をほぼ均一化することができると共に、サーボ
情報の読取りも容易となるものである。In this way, by recording so that the number of sectors in the data area sandwiched by the servo information area changes in the ``I''-radial direction, that is, according to the cylinder position, the bit density of data can be made almost uniform. This makes it possible to read the servo information easily.
尚、第２図に示す如く、サーボ情報としてはシリンダ位
置情報であるグレーコードと、ヘッド位置ずれ検出用の
オフセットパターンの他に、ＩＤ情報が含まれているが
、このＩＤ情報はグレーコードのシリンダ位置情報と等
価であるので、このＩＤ情報を省略することができる。As shown in Fig. 2, the servo information includes ID information in addition to the gray code that is cylinder position information and the offset pattern for detecting head position deviation. Since it is equivalent to cylinder position information, this ID information can be omitted.
このＩＤ情報の省略により、記録容量を更に増大するこ
とがｎ１能となる。By omitting this ID information, it becomes possible to further increase the recording capacity.
発明の効果
以上述べた如く、本発明によれば、データ面のサーボ情
報エリアにより挾まれるデータエリア内のセクタ数を、
シリンダ位置に応じて変化させることにより、サーボ情
報エリアを゛１ｉ径線上に整列して設けることができ、
よってゾーンビットレコーディングとセクタサーボの併
用が可能となるという効果がある。Effects of the Invention As described above, according to the present invention, the number of sectors in the data area sandwiched by the servo information area on the data surface can be
By changing it according to the cylinder position, the servo information area can be arranged and provided on the 1i diameter line.
Therefore, there is an effect that zone bit recording and sector servo can be used together.
第１図は本発明の実施例の磁気ディスクのブタ面の記録
フォーマットを示す図、第２図は第１図の１部拡大図で
ある。
主要部分の符号の説明
１・・・・・・サーボ情報エリア
３・・・・・・データエリアFIG. 1 is a diagram showing a recording format of a pig side of a magnetic disk according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a portion of FIG. 1. Explanation of symbols of main parts 1... Servo information area 3... Data area
Claims (1)
ットレコーディング方式の磁気ディスク媒体であって、
前記データ面において、複数の半径線上に放射状にサー
ボ情報エリアを設け、前記サーボ情報エリアに挾まれた
各データエリア内のセクタ数をシリンダ位置に応じて変
化させるように記録してなる磁気ディスク媒体。(1) A zone bit recording type magnetic disk medium that substantially equalizes the bit density on the data surface,
A magnetic disk medium in which servo information areas are provided radially on a plurality of radial lines on the data surface, and the number of sectors in each data area sandwiched by the servo information areas is recorded so as to vary depending on the cylinder position. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31716389A JPH03178004A (en) | 1989-12-06 | 1989-12-06 | Magnetic disk medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31716389A JPH03178004A (en) | 1989-12-06 | 1989-12-06 | Magnetic disk medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03178004A true JPH03178004A (en) | 1991-08-02 |
Family
ID=18085160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31716389A Pending JPH03178004A (en) | 1989-12-06 | 1989-12-06 | Magnetic disk medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03178004A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004053849A1 (en) * | 2002-12-12 | 2004-06-24 | Fujitsu Limited | Disc apparatus, disc apparatus assembly. disc apparatus manufacturing method |
-
1989
- 1989-12-06 JP JP31716389A patent/JPH03178004A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004053849A1 (en) * | 2002-12-12 | 2004-06-24 | Fujitsu Limited | Disc apparatus, disc apparatus assembly. disc apparatus manufacturing method |
| US7317587B2 (en) | 2002-12-12 | 2008-01-08 | Fujitsu Limited | Magnetic disk devices with data recording areas set separately for each device |
| US7706091B2 (en) | 2002-12-12 | 2010-04-27 | Toshiba Storage Device Corporation | Magnetic disk devices with data recording areas set separately for each device |
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