Nothing Special   »   [go: up one dir, main page]

JP4432269B2 - Recording operation evaluation device - Google Patents

Recording operation evaluation device Download PDF

Info

Publication number
JP4432269B2
JP4432269B2 JP2001061508A JP2001061508A JP4432269B2 JP 4432269 B2 JP4432269 B2 JP 4432269B2 JP 2001061508 A JP2001061508 A JP 2001061508A JP 2001061508 A JP2001061508 A JP 2001061508A JP 4432269 B2 JP4432269 B2 JP 4432269B2
Authority
JP
Japan
Prior art keywords
head
recording medium
recording
introduction path
loading
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.)
Expired - Fee Related
Application number
JP2001061508A
Other languages
Japanese (ja)
Other versions
JP2002260357A (en
Inventor
智紀 片野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Device Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Electric Device Technology Co Ltd filed Critical Fuji Electric Device Technology Co Ltd
Priority to JP2001061508A priority Critical patent/JP4432269B2/en
Publication of JP2002260357A publication Critical patent/JP2002260357A/en
Application granted granted Critical
Publication of JP4432269B2 publication Critical patent/JP4432269B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Description

【0001】
【発明の属する技術分野】
本発明は、磁気的あるいは光学的手段により情報を記録再生する記録装置と同様の動作を行うようにした装置により前記記録装置に使用される記録媒体およびヘッドの記録動作に対する評価を行う記録動作評価装置に関する。
【0002】
【従来の技術】
HDD(Hard Disk Drive)などの記録装置はコンピュータの代表的な外部記録装置として広く普及している。同記録装置は、回転するディスク状の磁気記録媒体と、この記録媒体の回転により発生する気流により記録媒体から微小隙間を以って浮上させて記録媒体上に磁気的に情報を記録、再生する磁気ヘッドとを備えている。
【0003】
従来のこの種記録装置では、起動時にはヘッドを記録媒体面上に接触させた状態のまま記録媒体を回転させることにより浮上させ、停止時にはヘッドを媒体面上に接触させるという方式を採用していた。この方式はCSS(コンタクト・スタート・ストップ Contact Start Stop)方式と呼ばれているが、記録媒体の信頼性向上および高記録密度化の面で次のような問題がある。
【0004】
すなわち、CSS方式はヘッドの接触摺動を伴うため記録媒体の摩耗やパーティクル発生による信頼性が低下する問題がある。また、起動時のヘッドと記録媒体との吸着・摩擦を減少させるために記録媒体表面にテクスチャーと呼ばれる微小凹凸が設けられているため、ヘッドの浮上量をこのテクスチャーの高さ以下には設定できず、ヘッド浮上量が大きくなって高記録密度化を図る場合の障壁となる。
【0005】
これに対して、ヘッドロード・アンロード(Load/Unload)方式、すなわち、停止時にはヘッドを媒体面上から待避(アンロード)させ、起動して記録媒体がヘッドを浮上可能な回転状態になった時点でヘッドを媒体面上に導入(ロード)させる方式では、CSS方式のように記録媒体とヘッドとの接触を伴うことがないため記録媒体の信頼性が高くなり、また、記録媒体にテクスチャーを設ける必要がないためヘッド浮上量の狭小化を図ることが可能となるので高記録密度化に対応することができる。
【0006】
図3にHDDにおける一般的なヘッドのロード・アンロード機構1の従来例を示す。
【0007】
この従来のロード・アンロード機構におけるヘッド2には、先端に導入路となるランプ4上に保持されるタブ21が設けられており、ヘッド2を記録媒体3上に導入(ロード)する際、このタブ21をランプ4の傾斜した上面に沿わせて移動し、ヘッド2を記録媒体3上へ案内する。また待避(アンロード)する際も同様にタブ21をランプ4の上面に沿って待避位置へ移動させる。このロード・アンロード方式では、ヘッド2が記録媒体3に接触しないようにランプ4で持ち上げた状態で記録媒体3の面上にロードする際、ヘッドと媒体表面との間の微小間隙面間に生じるスクイーズ圧力と呼ばれる気流による圧力を利用してヘッド2の慣性を受け止め、ヘッド2を記録媒体3に接触させることなくその上面にロードさせる設計をしている。しかしながら、ロード時のヘッド姿勢角度、記録媒体の振れ、外部振動などの影響で十分なスクイーズ圧力が得られずに接触状態となり、媒体とヘッドとの間に衝撃が発生することがある。同様にアンロード時、すなわち記録媒体3の上面からヘッド2を引き離す際、記録媒体3とヘッド2との間に一時的に吸着力が発生し、これによりヘッドを支持しているサスペンションが媒体側に引っ張られ、ヘッド2が記録媒体面から離れる際に振動してヘッドが媒体面に打ち付けられる、いわゆる「スラッピング」とよばれる現象が発生し、ロード時と同様にヘッド2と記録媒体3との間に衝撃が発生することがある。
【0008】
以上のことからヘッドロード・アンロード方式の記録装置では、ロード動作時およびアンロード動作時に発生する衝撃に対する記録媒体およびヘッドの信頼性を確保する必要があり、開発段階における信頼性評価が非常に重要なものとなる。記録媒体およびヘッドの信頼性評価には、ヘッドロード・アンロード方式のHDDと同様の動作が行えるスピンスタンドと呼ばれる記録動作評価装置を用いて、ロード、アンロードの繰り返し動作により評価する。
【0009】
図4は従来の記録動作評価装置におけるロード時の動作を示している。ヘッド2はボイスコイルモータ等からなる図示しない駆動装置により駆動されて点線で示す位置からタブ21によりランプ4に沿って案内されて実線で示す位置で記録媒体3上へロードされることになるため、ロード動作による記録媒体3上の損傷は、ランプ4の先端部付近のゾーン31に発生する。
【0010】
図5はアンロード時の動作を示しており、ヘッド2はロード時と同じランプの先端部付近の位置でアンロードされるため、アンロード時の記録媒体3に生じる損傷ゾーン32もロード時の損傷ゾーン31と一致する。そのため、被試験記録媒体上にはロード動作時とアンロード動作時の両方の損傷が混在することになり、試験後の評価では損傷原因の特定が困難となる。
【0011】
【発明が解決しようとする課題】
本発明の課題は、L/UL方式の記録装置で使用される記録媒体を試験する際に、この被試験記録媒体上におけるロード動作時の損傷とアンロード動作時の損傷の混在を避け、試験後の評価において損傷原因の特定を可能にすることにある。
【0012】
【課題を解決するための手段】
本発明は上記の課題を達成するため、磁気的、光学的あるいはその他の手段で情報を記録再生するヘッドと、基板上に情報記録層を有するディスク状記録媒体とにより構成され、前記記録媒体が停止している時には前記ヘッドが前記記録媒体と非接触状態となる位置に待避した状態にあり、前記記録媒体が回転駆動された時に前記ヘッドが導入路に沿って前記記録媒体上に導入され、停止する時に前記ヘッドを前記導入路に沿って待避させるようにしてなるヘッドロード・アンロード方式の記録装置と同様の記録再生機構を備え、前記記録装置で使用される記録媒体およびヘッドの記録再生動作に対する評価を行う記録動作評価装置において、前記ヘッドを導入するときの、前記ヘッドの前記記録媒体上の半径位置と、前記ヘッド待避させるときの、前記ヘッドの前記記録媒体上の半径位置とが異なるように、前記導入路を駆動する駆動装置を設けたことを特徴とする。
【0013】
この場合、ヘッドをロード、アンロードするための導入路を前記記録媒体の半径方向に移動させるための駆動装置を設け、これにより導入路の位置をロード時とアンロード時とで変更するようにするのがよい。
【0014】
【発明の実施の形態】
図1および図2は本発明による記録動作評価装置の実施例の動作状態を示している。
【0015】
この実施例において、従来装置と同一の要素は同一の符号で示し、説明を省略する。実施例の装置が従来の装置と異なる点は、導入路であるランプ4に、その位置を記録媒体3の半径方向に移動するための電磁式のアクチュエータ等からなる駆動機構5を付設している点である。
この駆動機構5は、ランプ4を駆動して記録媒体3の半径方向に移動させる機構である。待機時およびロード動作時は、この駆動機構5によりランプ4を引っ張って図1に示すように記録媒体3の外周付近のゾーン31にかかる位置に置き、アンロード時には図2に示すように、駆動装置5によりランプ4を記録媒体3の中心に向けて押し、ゾーン31より内側のゾーン32にかかる位置へ移動させるようにする。
【0016】
待機している状態では、ランプ4は従来の記録動作評価装置と同様に記録媒体3の外周側にセットされており、ヘッド2の先端のタブ21が図1に点線で示すようにこのランプ4の上に保持されている。ヘッド2をロードするときは、ランプ4はそのままにして、ヘッド2を図示しないヘッド駆動装置により記録媒体3側へ駆動することによりタブ21がランプ4の上面を沿わせて移動され、ヘッド2がランプ4の先端部で記録媒体3の外周側ゾーン31上にロードされる。このためロード動作によるヘッド2と記録媒体3との接触は記録媒体3のゾーン31の範囲で発生し、このゾーン31が損傷される。
【0017】
一方、記録媒体3の上面にあるヘッド2をアンロードするときは、図2に示すように、駆動機構5によってランプ4を記録媒体3の中心側に押してその先端がゾーン31から離れてゾーン32にかかる位置へ移動させる。この状態でヘッド2を図示しないヘッド駆動装置により記録媒体の外周側へ駆動し、ヘッド2の先端のタブ21をランプ4上に乗り上げさせてヘッド2を記録媒体3上から待避する。したがって、ヘッド2のアンロード位置はロード位置よりも内周側のゾーン32の位置となり、このときにヘッド2と接触して記録媒体3が損傷されるのはこのゾーン32の範囲内となる。
【0018】
このように、ヘッド2のロード時とアンロード時においてランプ4の位置を変えてやれば、ロード動作時の損傷ゾーン31とアンロード動作時の損傷ゾーン32とを完全に分離することができる。すなわち、ロード動作時の損傷とアンロード動作時の損傷とを独立して評価することができるので、従来できなかった損傷の原因特定などが可能となり、L/UL方式の記録装置で使用する記録媒体の信頼性評価のレベルを従来に比べ一段と向上することができる。
【0019】
なお、本実施例ではヘッドのロード位置がアンロード位置より外周側の例を示したが、本発明の主旨は両者の位置を異ならせることにあり、位置関係を逆にしても同じ効果が得られる。
【0020】
【発明の効果】
この発明によれば、ヘッドロード・アンロード方式の記録装置用の記録媒体を記録動作評価装置において、ヘッドの導入路を駆動する駆動装置を設けることにより、ヘッドを記録媒体上へロード(導入)するときの半径位置と記録媒体上からアンロード(待避)するときの半径位置を相互に変えてずらすようにしているので、ヘッドをロードするときの記録媒体における損傷位置とヘッドアンロードするときの記録媒体における損傷位置とを分離できるので、記録媒体上の損傷の解析、評価のレベルを従来よりも向上できる利点がもたらされる。
【図面の簡単な説明】
【図1】本発明の実施例のヘッドのロード動作の説明図。
【図2】本発明の実施例のヘッドのアンロード動作の説明図。
【図3】従来のヘッドロード・アンロード方式のHDD要部を示す斜視図。
【図4】従来の記録動作評価装置におけるロード動作の説明図。
【図5】従来の記録動作評価装置におけるロード動作の説明図。
【符号の説明】
1 HDDにおけるヘッドロード・アンロード機構
2 ヘッド
21 タブ
3 記録媒体
31 ロード動作による損傷ゾーン
32 アンロード動作による損傷ゾーン
4 ランプ(導入路)
5 駆動機構
[0001]
BACKGROUND OF THE INVENTION
The present invention provides a recording operation evaluation for evaluating a recording operation of a recording medium and a head used in the recording apparatus by an apparatus configured to perform the same operation as a recording apparatus that records and reproduces information by magnetic or optical means. Relates to the device.
[0002]
[Prior art]
Recording devices such as HDDs (Hard Disk Drives) are widely used as typical external recording devices for computers. The recording apparatus records and reproduces information magnetically on the recording medium by floating with a small gap by a rotating disk-shaped magnetic recording medium and an air flow generated by the rotation of the recording medium. And a magnetic head.
[0003]
This type of conventional recording apparatus employs a system in which the head is brought into contact with the surface of the recording medium when starting up and the recording medium is floated by rotating the head while the head is in contact with the surface of the recording medium when stopped. . This method is called a CSS (Contact Start Stop) method, but has the following problems in terms of improving the reliability of the recording medium and increasing the recording density.
[0004]
That is, since the CSS method involves contact sliding of the head, there is a problem that reliability due to wear of the recording medium or generation of particles is lowered. In addition, since the surface of the recording medium has minute irregularities called texture to reduce the adsorption and friction between the head and the recording medium at startup, the flying height of the head can be set below the height of this texture. In other words, the head flying height becomes a barrier when the recording density is increased.
[0005]
On the other hand, the head load / unload method, that is, when the head is stopped, the head is retracted (unloaded) from the medium surface, and is activated so that the recording medium is in a rotating state capable of flying the head. In the system in which the head is introduced (loaded) onto the medium surface at the time, since the recording medium and the head do not come into contact with each other unlike the CSS system, the reliability of the recording medium is increased, and the texture is added to the recording medium. Since it is not necessary to provide the head, the flying height of the head can be reduced, so that the recording density can be increased.
[0006]
FIG. 3 shows a conventional example of a general head loading / unloading mechanism 1 in the HDD.
[0007]
The head 2 in this conventional load / unload mechanism is provided with a tab 21 held on the ramp 4 serving as an introduction path at the tip, and when the head 2 is introduced (loaded) onto the recording medium 3, The tab 21 is moved along the inclined upper surface of the lamp 4 to guide the head 2 onto the recording medium 3. Similarly, when the vehicle is retracted (unloaded), the tab 21 is moved along the upper surface of the lamp 4 to the retracted position. In this loading / unloading method, when loading on the surface of the recording medium 3 in a state where the head 2 is lifted up by the lamp 4 so as not to contact the recording medium 3, it is between the minute gap surface between the head and the medium surface. The design is such that the inertia of the head 2 is received by using the pressure generated by the air current called squeeze pressure, and the head 2 is loaded on the upper surface thereof without contacting the recording medium 3. However, due to the influence of the head attitude angle at the time of loading, the vibration of the recording medium, external vibration, and the like, a sufficient squeeze pressure cannot be obtained and a contact state may occur, and an impact may be generated between the medium and the head. Similarly, at the time of unloading, that is, when the head 2 is pulled away from the upper surface of the recording medium 3, a suction force is temporarily generated between the recording medium 3 and the head 2, whereby the suspension supporting the head is moved to the medium side. So that when the head 2 moves away from the surface of the recording medium, a phenomenon called “slapping” occurs in which the head is struck against the surface of the medium. Shock may occur during the period.
[0008]
From the above, it is necessary to ensure the reliability of the recording medium and the head against the impact generated during the load operation and unload operation in the head load / unload type recording apparatus. It will be important. For the reliability evaluation of the recording medium and the head, a recording operation evaluation apparatus called a spin stand capable of performing the same operation as that of a head load / unload type HDD is used, and the evaluation is performed by repeated loading and unloading operations.
[0009]
FIG. 4 shows an operation at the time of loading in the conventional recording operation evaluation apparatus. The head 2 is driven by a drive device (not shown) including a voice coil motor and the like, and is guided along the lamp 4 by the tab 21 from the position indicated by the dotted line and loaded onto the recording medium 3 at the position indicated by the solid line. The damage on the recording medium 3 due to the loading operation occurs in the zone 31 near the tip of the lamp 4.
[0010]
FIG. 5 shows the operation at the time of unloading. Since the head 2 is unloaded at the same position near the tip of the lamp as that at the time of loading, the damage zone 32 generated in the recording medium 3 at the time of unloading is also the same as that at the time of loading. It coincides with the damage zone 31. For this reason, both the load operation and the unload operation are mixed on the recording medium to be tested, and it is difficult to identify the cause of the damage in the evaluation after the test.
[0011]
[Problems to be solved by the invention]
It is an object of the present invention to avoid a mixture of damage during load operation and damage during unload operation on a recording medium to be tested when testing a recording medium used in an L / UL recording apparatus. It is to enable identification of the cause of damage in later evaluation.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises a head for recording / reproducing information by magnetic, optical or other means, and a disk-shaped recording medium having an information recording layer on a substrate. When the head is stopped, the head is retracted to a position where it is not in contact with the recording medium, and when the recording medium is driven to rotate, the head is introduced along the introduction path onto the recording medium, A recording medium and a recording / reproducing mechanism used in the recording apparatus and a recording / reproducing mechanism used in the recording apparatus, the recording / reproducing mechanism being the same as the recording apparatus of the head load / unload system configured to retract the head along the introduction path when stopping. in the recording operation evaluation apparatus for evaluating for the operation, at the time of introducing the head, and radial position on the recording medium of the head, to the head retracting Kino, wherein the the radial position on the recording medium is different from the head, characterized in that a driving device for driving the introduction path.
[0013]
In this case, a drive device is provided for moving the introduction path for loading and unloading the head in the radial direction of the recording medium, so that the position of the introduction path is changed between loading and unloading. It is good to do.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show the operating state of an embodiment of a recording operation evaluation apparatus according to the present invention.
[0015]
In this embodiment, the same elements as those of the conventional apparatus are denoted by the same reference numerals, and description thereof is omitted. The apparatus of the embodiment differs from the conventional apparatus in that a drive mechanism 5 comprising an electromagnetic actuator or the like for moving the position of the lamp 4 as an introduction path in the radial direction of the recording medium 3 is attached. Is a point.
The drive mechanism 5 is a mechanism that drives the lamp 4 to move in the radial direction of the recording medium 3. During the standby and loading operation, the driving mechanism 5 pulls the lamp 4 and places it in a position over the zone 31 near the outer periphery of the recording medium 3 as shown in FIG. 1, and during unloading, as shown in FIG. The apparatus 4 pushes the lamp 4 toward the center of the recording medium 3 to move it to a position on the zone 32 inside the zone 31.
[0016]
In the standby state, the lamp 4 is set on the outer peripheral side of the recording medium 3 as in the conventional recording operation evaluation apparatus, and the tab 21 at the tip of the head 2 is shown in FIG. Is held on top. When the head 2 is loaded, the tab 4 is moved along the upper surface of the lamp 4 by driving the head 2 toward the recording medium 3 by a head driving device (not shown) while the lamp 4 is left as it is. The lamp 4 is loaded on the outer peripheral side zone 31 of the recording medium 3 at the tip end portion thereof. For this reason, the contact between the head 2 and the recording medium 3 due to the loading operation occurs in the zone 31 of the recording medium 3, and the zone 31 is damaged.
[0017]
On the other hand, when the head 2 on the upper surface of the recording medium 3 is unloaded, as shown in FIG. 2, the driving mechanism 5 pushes the lamp 4 toward the center of the recording medium 3 so that the tip is separated from the zone 31 and the zone 32. Move to the position where In this state, the head 2 is driven to the outer peripheral side of the recording medium by a head driving device (not shown), and the tab 21 at the tip of the head 2 rides on the ramp 4 to retract the head 2 from the recording medium 3. Therefore, the unloading position of the head 2 is the position of the zone 32 on the inner peripheral side with respect to the loading position. At this time, the recording medium 3 is damaged in contact with the head 2 within the zone 32.
[0018]
Thus, if the position of the lamp 4 is changed when the head 2 is loaded and unloaded, the damaged zone 31 during the loading operation and the damaged zone 32 during the unloading operation can be completely separated. In other words, since damage during the load operation and damage during the unload operation can be independently evaluated, it is possible to identify the cause of damage that could not be done in the past, and recording used in an L / UL recording apparatus. The level of medium reliability evaluation can be further improved as compared with the conventional one.
[0019]
In this embodiment, an example in which the load position of the head is on the outer peripheral side from the unload position is shown. However, the gist of the present invention is to make the positions different from each other, and the same effect can be obtained even if the positional relationship is reversed. It is done.
[0020]
【The invention's effect】
According to the present invention, in a recording operation evaluation apparatus for a recording medium for a head load / unload recording apparatus , the head is loaded (introduced) onto the recording medium by providing the drive device for driving the head introduction path. since the radial position and the recording medium on to a radial position when unloading (retracting) to shift instead to each other at the time of, at the time of the head unload the damage location on the recording medium when loading the head Since the damage position in the recording medium can be separated, there is an advantage that the level of analysis and evaluation of damage on the recording medium can be improved as compared with the conventional technique.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a head loading operation according to an embodiment of the invention.
FIG. 2 is an explanatory diagram of a head unloading operation according to an embodiment of the invention.
FIG. 3 is a perspective view showing a main part of a conventional head load / unload type HDD.
FIG. 4 is an explanatory diagram of a loading operation in a conventional recording operation evaluation apparatus.
FIG. 5 is an explanatory diagram of a loading operation in a conventional recording operation evaluation apparatus.
[Explanation of symbols]
1 Head load / unload mechanism in HDD 2 Head 21 Tab 3 Recording medium 31 Damage zone due to load operation 32 Damage zone due to unload operation 4 Ramp (introduction path)
5 Drive mechanism

Claims (2)

磁気的、光学的あるいはその他の手段で情報を記録再生するヘッドと、基板上に情報記録層を有するディスク状記録媒体とにより構成され、前記記録媒体が停止している時には前記ヘッドが前記記録媒体と非接触状態となる位置に待避した状態にあり、前記記録媒体が起動し回転している時に前記ヘッドが導入路に沿って前記記録媒体上に導入され、停止する時に前記ヘッドを前記導入路に沿って待避させるようにしてなるヘッドロード・アンロード方式の記録装置と同様の記録再生動作をし、前記記録装置で使用される記録媒体およびヘッドの記録動作に対する評価を行う記録動作評価装置において、前記ヘッドを導入するときの、前記ヘッドの前記記録媒体上の半径位置と、前記ヘッド待避させるときの、前記ヘッドの前記記録媒体上の半径位置とが異なるように、前記導入路を駆動する駆動装置を設けたことを特徴とする記録動作評価装置。A head for recording / reproducing information by magnetic, optical or other means, and a disk-shaped recording medium having an information recording layer on a substrate, and when the recording medium is stopped, the head is the recording medium When the recording medium is activated and rotated, the head is introduced onto the recording medium along the introduction path, and when the recording medium is stopped, the head is moved to the introduction path. In a recording operation evaluation apparatus for performing recording and reproducing operations similar to those of a recording apparatus of a head load / unload system configured to be retracted along the recording medium, and evaluating the recording operation of the recording medium and the head used in the recording apparatus , when introducing the head, and radial position on the recording medium of the head, at which to the head retracted, on the recording medium of said head In the radial position is different, the recording operation evaluation apparatus characterized in that a driving device for driving the introduction path. 請求項1に記載の装置において、記録媒体の外周にヘッドの導入、待避を行なう導入路を設けるとともに、この導入路にこれを記録媒体の半径方向に移動する駆動装置を結合して、この駆動装置により導入路の位置をヘッドを導入するときと待避するときとで異なる位置に変えることを特徴とする記録動作評価装置。  2. The apparatus according to claim 1, wherein an introduction path for introducing and evacuating the head is provided on the outer periphery of the recording medium, and a driving device for moving the introduction path in the radial direction of the recording medium is coupled to the driving path. An apparatus for evaluating a recording operation, wherein the position of the introduction path is changed to a different position between when the head is introduced and when the head is retracted.
JP2001061508A 2001-03-06 2001-03-06 Recording operation evaluation device Expired - Fee Related JP4432269B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001061508A JP4432269B2 (en) 2001-03-06 2001-03-06 Recording operation evaluation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001061508A JP4432269B2 (en) 2001-03-06 2001-03-06 Recording operation evaluation device

Publications (2)

Publication Number Publication Date
JP2002260357A JP2002260357A (en) 2002-09-13
JP4432269B2 true JP4432269B2 (en) 2010-03-17

Family

ID=18920793

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001061508A Expired - Fee Related JP4432269B2 (en) 2001-03-06 2001-03-06 Recording operation evaluation device

Country Status (1)

Country Link
JP (1) JP4432269B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8553365B1 (en) * 2012-02-21 2013-10-08 Western Digital (Fremont), Llc Apparatuses and methods for loading a head onto a disk medium

Also Published As

Publication number Publication date
JP2002260357A (en) 2002-09-13

Similar Documents

Publication Publication Date Title
US7690100B2 (en) Techniques for certifying a head-gimbal assembly
KR100757291B1 (en) Ramp loading unit and drive having the same
KR100847497B1 (en) Head support unit and drive having the same
US7483233B2 (en) Method and apparatus for driving VCM unloading HDD head
JPWO2003069619A1 (en) Ramp load device and disk device having the same
JP3774337B2 (en) Disk storage device and head retracting device applied to the same
JP4432269B2 (en) Recording operation evaluation device
KR100373750B1 (en) Actuator loading/unloading device for disc drive
KR20050007123A (en) Hard disk drive having a means for controlling movement of a head and method for moving the head
JP2003297028A (en) Hard disk drive having air flow accelerating device
KR100532492B1 (en) Ramp loading type head parking apparatus for disk drive
CN112863551B (en) Recording/reproducing apparatus
JP2003036624A (en) Recording operation evaluating device
JP2656351B2 (en) Carriage mechanism of data recording / reproducing device
KR100532466B1 (en) Ramp loading type head parking apparatus for disk drive
JP2653350B2 (en) Information reading head support device
JP2001273744A (en) Magnetic disk device having motor locking mechanism
KR100919246B1 (en) Data storing medium and hard disk drive with the same
JPH1196708A (en) Head loading controller of disk memory device and head loading control method
JPH1097701A (en) Magnetic disk unit and magnetic disk used for the same
JPH08249851A (en) Disk device and its inside stopper
US20060221486A1 (en) Reading tracks from a media during back-EMF velocity control
JP2001118338A (en) Magnetic disk device
JPH04153909A (en) Magnetic disk device
JP2006344324A (en) Magnetic disk device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20071016

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20090827

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090915

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20091105

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20091201

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20091214

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130108

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130108

Year of fee payment: 3

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130108

Year of fee payment: 3

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130108

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130108

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140108

Year of fee payment: 4

LAPS Cancellation because of no payment of annual fees