JPH09312084A - Information recording device - Google Patents
Information recording deviceInfo
- Publication number
- JPH09312084A JPH09312084A JP8129676A JP12967696A JPH09312084A JP H09312084 A JPH09312084 A JP H09312084A JP 8129676 A JP8129676 A JP 8129676A JP 12967696 A JP12967696 A JP 12967696A JP H09312084 A JPH09312084 A JP H09312084A
- Authority
- JP
- Japan
- Prior art keywords
- information
- carrier
- transfer
- history
- information recording
- 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
Landscapes
- Management Or Editing Of Information On Record Carriers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、着脱可能な情報記
録担体に情報を記録再生する情報記録装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording device for recording / reproducing information on / from a removable information record carrier.
【０００２】[0002]
【従来の技術】従来より、磁気ディスク装置等の情報記
録装置が知られており、これらの装置の中には、情報を
一時的に蓄える機能を有しているものがある。この情報
記録装置では、記録動作の途中で電源が突然遮断されて
も、記録中の情報を保持しておくことにより、電源の再
投入後に保持していた情報を情報記録担体に書き込むこ
とができる。ところで、情報記録装置からの着脱が可能
な情報記録担体については、電源が再投入されたとき装
着されている担体がその前に電源が切られたとき装着さ
れていた担体と同一とは限らない。しかし、従来の情報
記録装置には担体が同一かどうかを確認する手段がな
く、また保持していた情報を担体の確認なしに書き込む
と、本来記録すべき担体とは別の担体に書き込んでしま
うことが有り得る。2. Description of the Related Art Conventionally, information recording devices such as magnetic disk devices have been known, and some of these devices have a function of temporarily storing information. In this information recording apparatus, even if the power is suddenly cut off during the recording operation, the information being recorded is retained so that the information retained after the power is turned on can be written to the information record carrier. . By the way, regarding the information recording carrier that can be attached to and detached from the information recording device, the carrier that is mounted when the power is turned on again is not necessarily the same as the carrier that was mounted before the power was turned off. . However, the conventional information recording apparatus has no means for confirming whether or not the carrier is the same, and if the held information is written without confirming the carrier, the information is written on a carrier different from the carrier to be originally recorded. It is possible.
【０００３】[0003]
【発明が解決しようとする課題】以上のように、着脱可
能な情報記録担体に情報を記録再生する情報記録装置に
おいては、電源が再投入されたとき装着されている担体
が電源が切られたとき装着されていた担体と同一とは限
らないため、電源の遮断によって転送できなかった情報
を電源の再投入後に記録すべき担体に転送し直して情報
の整合性をとることが困難であり、誤って別の担体に情
報を書き込んでしまうことも有り得るため信頼性が得ら
れないという問題点があった。本発明は、上記課題を解
決するためになされたもので、着脱可能な情報記録担体
に情報を記録再生する情報記録装置において、情報の整
合性と信頼性を向上させることを目的とする。As described above, in the information recording apparatus for recording / reproducing information on / from the removable information recording carrier, the mounted carrier is turned off when the power is turned on again. Since it is not always the same as the mounted carrier, it is difficult to transfer the information that could not be transferred due to the power off to the carrier to be recorded after the power is turned on again to make the information consistent, There is a problem that reliability cannot be obtained because information may be accidentally written on another carrier. The present invention has been made to solve the above problems, and an object of the present invention is to improve the consistency and reliability of information in an information recording apparatus that records and reproduces information on a removable information record carrier.
【０００４】[0004]
【課題を解決するための手段】本発明は、装置からの着
脱が可能な情報記録担体に転送すべき情報を電源の遮断
時においても保持する不揮発性記憶手段と、担体への情
報転送が完了しているかどうかを判定する情報転送判定
手段と、現在装着されている担体が電源の遮断前に転送
対象としていた担体かどうかを判定する履歴判定手段
と、担体への情報転送が未了で、かつ装着されている担
体が電源の遮断前に転送対象としていた担体であると判
定されたとき、不揮発性記憶手段に保持されている情報
を担体に書き込む書込手段とを有するものである。この
ように不揮発性記憶手段、情報転送判定手段、履歴判定
手段及び書込手段を設けることにより、担体への情報転
送が未了で、かつ装着されている担体が電源の遮断前に
転送対象としていた担体であると判定したとき、不揮発
性記憶手段に保持されている情報が担体に書き込まれ
る。According to the present invention, a nonvolatile storage means for holding information to be transferred to an information record carrier which can be attached to and detached from a device even when the power is cut off, and information transfer to the carrier is completed. Information transfer determining means for determining whether or not the carrier currently mounted is a carrier for determining whether or not the currently mounted carrier is a carrier to be transferred before the power is cut off, and information transfer to the carrier is not completed, In addition, when it is determined that the mounted carrier is the carrier to be transferred before the power is turned off, the writing means writes the information held in the nonvolatile storage means into the carrier. By thus providing the nonvolatile storage means, the information transfer determination means, the history determination means, and the writing means, the information transfer to the carrier is not completed, and the mounted carrier is the transfer target before the power is turned off. When it is determined that the carrier is the existing carrier, the information held in the nonvolatile storage means is written in the carrier.
【０００５】また、情報記録担体から情報を読み取る読
取手段を有し、情報記録担体は、固有の識別子と、その
担体に最後に記録動作を施した情報記録装置を示す履歴
情報とが書き込まれたものであり、履歴判定手段は、読
取手段が担体から読み取った識別子及び履歴情報に基づ
いて判定を行うものであり、書込手段は、担体に情報を
書き込んだ後に担体の保持する履歴情報を更新するもの
である。Further, the information recording medium has a reading means for reading information from the information recording medium, and the information recording medium is written with a unique identifier and history information indicating the information recording device which performed the last recording operation on the medium. The history determining means makes a determination based on the identifier and the history information read by the reading means from the carrier, and the writing means updates the history information held by the carrier after writing the information on the carrier. To do.
【０００６】[0006]
【発明の実施の形態】図１は本発明の第１の実施の形態
を示す情報記録装置のブロック図、図２はこの情報記録
装置の動作を示すフローチャート図である。図１におい
て、１は光磁気ディスク等の情報記録担体、２は情報記
録装置（光磁気ディスク・ドライブ装置）、３は光ヘッ
ド、４は担体１から情報を読み取るための読取回路、５
は担体１への情報転送が完了しているかどうかを判定す
る情報転送判定回路である。1 is a block diagram of an information recording apparatus showing a first embodiment of the present invention, and FIG. 2 is a flow chart showing the operation of the information recording apparatus. In FIG. 1, 1 is an information recording carrier such as a magneto-optical disk, 2 is an information recording device (magneto-optical disk drive device), 3 is an optical head, 4 is a reading circuit for reading information from the carrier 1, 5
Is an information transfer determination circuit for determining whether or not the information transfer to the carrier 1 is completed.
【０００７】また、６は現在装着されている担体１が電
源の遮断前に転送対象としていた担体かどうかを判定す
る履歴判定回路、７は担体１と情報のやり取りをする際
に一時的に情報を蓄えておくためのキャッシュメモリ、
８は情報を電源の遮断時においても保持する不揮発性メ
モリ、９は担体１に情報を書き込むための書込回路、１
０は情報記録装置全体を制御する制御回路である。Further, 6 is a history judgment circuit for judging whether the currently mounted carrier 1 is the carrier to be transferred before the power is cut off, and 7 is a temporary information when the information is exchanged with the carrier 1. Cache memory for storing
Reference numeral 8 is a non-volatile memory that holds information even when the power is cut off, 9 is a writing circuit for writing information on the carrier 1, 1
Reference numeral 0 is a control circuit for controlling the entire information recording apparatus.
【０００８】次に、このような情報記録装置２の電源再
投入後の動作を説明する。まず、情報記録装置２の電源
が投入されると（図２ステップ１０１）、制御回路１０
は情報記録担体１が装着されているかどうかを判定する
（ステップ１０２）。そして、制御回路１０は、情報記
録担体１が装着されていると、この担体１から情報を読
み取らせる（ステップ１０３）。すなわち、光ヘッド３
から担体１にレーザー光を照射して担体１からの反射光
を光ヘッド３で検出し、これにより得られた光ヘッド３
からの信号を読取回路４が復調することにより、担体１
から情報を読み取ることができる。Next, the operation of the information recording apparatus 2 after the power is turned on again will be described. First, when the information recording apparatus 2 is powered on (step 101 in FIG. 2), the control circuit 10
Determines whether the information record carrier 1 is mounted (step 102). Then, when the information recording carrier 1 is mounted, the control circuit 10 causes the information to be read from this carrier 1 (step 103). That is, the optical head 3
The carrier 1 is irradiated with laser light from the carrier to detect the reflected light from the carrier 1 with the optical head 3, and the optical head 3 thus obtained is obtained.
The read circuit 4 demodulates the signal from the carrier 1 so that the carrier 1
Information can be read from.
【０００９】ここで、情報記録担体１には、それに固有
な識別子と、担体１に最後に記録動作を施した情報記録
装置を示す履歴情報とが書き込まれており、電源投入時
の最初の読み出しではこれらの情報が読み取られる。続
いて、情報転送判定回路５は、キャッシュメモリ７から
担体１への情報転送が電源遮断時に完了していたかどう
かを判定する（ステップ１０４）。Here, the information recording carrier 1 is written with an identifier unique to it and history information indicating the information recording device that performed the recording operation last on the carrier 1, and the first reading when the power is turned on. Then, this information is read. Subsequently, the information transfer determination circuit 5 determines whether or not the information transfer from the cache memory 7 to the carrier 1 was completed when the power was cut off (step 104).
【００１０】この判定は、不揮発性メモリ８に情報が残
っているかどうかで判断する。つまり、不揮発性メモリ
８に書き込まれた情報は後述のように担体１への転送完
了後に消去されるので、メモリ８に情報が残っている場
合は転送が完了していないと判断し、残っていない場合
は転送が完了していると判断する。転送が完了している
と判断した場合は、ステップ１１０に進み、通常の動作
（図示しないホスト・コンピュータからの指示に従う動
作）を行う。This judgment is made based on whether or not information remains in the non-volatile memory 8. That is, the information written in the non-volatile memory 8 is erased after the transfer to the carrier 1 is completed as described later. Therefore, when the information remains in the memory 8, it is determined that the transfer is not completed and the information remains. If not, it is judged that the transfer is completed. If it is determined that the transfer has been completed, the process proceeds to step 110, and normal operation (operation according to an instruction from a host computer not shown) is performed.
【００１１】また、不揮発性メモリ８に情報が残ってい
て転送が完了していないと判断した場合、履歴判定回路
６が、担体１から読み取った識別子と、メモリ８に記憶
された電源遮断前に最後に転送対象としていた担体の識
別子とを比較する（ステップ１０５）。識別子が一致し
ない場合は、電源が切られたとき装着されていた担体で
はないと判断して、ステップ１１０に進む。When it is judged that the transfer is not completed because the information remains in the non-volatile memory 8, the history judgment circuit 6 stores the identifier read from the carrier 1 and the power supply stored in the memory 8 before power-off. Finally, the identifier of the carrier that was the transfer target is compared (step 105). If the identifiers do not match, it is determined that the carrier is not the one mounted when the power is turned off, and the process proceeds to step 110.
【００１２】そして、識別子が一致した場合、履歴判定
回路６は、担体１から読み取った履歴情報により、電源
遮断後から現在に至るまでの間に他の装置による記録動
作を受けていないかどうかを判定する（ステップ１０
６）。このとき、履歴情報が担体１に最後に記録動作を
施した情報記録装置が他の装置であると示している場合
は、電源遮断後から現在に至るまでの間に他の装置によ
る記録動作を受けていることになるから、ステップ１１
０に進む。When the identifiers match, the history determination circuit 6 determines whether or not the recording operation by another device is performed from the power-off to the present, based on the history information read from the carrier 1. Judge (Step 10
6). At this time, when the history information indicates that the information recording device that last performed the recording operation on the carrier 1 is another device, the recording operation by the other device is performed from the power-off to the present. I have received it, so step 11
Go to 0.
【００１３】また、履歴情報が担体１に最後に記録動作
を施した情報記録装置が自装置であると示している場
合、制御回路１０は、情報記録担体１に情報を書き込ま
せる（ステップ１０７）。すなわち、不揮発性メモリ８
に残っていた情報がキャッシュメモリ７へ転送され、こ
の情報が書込回路９によって記録信号に変換され、記録
信号に基づいたレーザー光が光ヘッド３から担体１に照
射されることにより、情報が担体１に書き込まれる。When the history information indicates that the information recording device that has performed the recording operation on the carrier 1 last is the device itself, the control circuit 10 causes the information recording carrier 1 to write the information (step 107). . That is, the nonvolatile memory 8
The information remaining in the cache memory 7 is transferred to the cache memory 7, this information is converted into a recording signal by the writing circuit 9, and the laser light based on the recording signal is emitted from the optical head 3 to the carrier 1, whereby the information is recorded. Written on carrier 1.
【００１４】この情報の転送後、制御回路１０は、担体
１に書き込まれた履歴情報を自装置が記録動作を施した
ことを示す情報に更新させる（ステップ１０８）。この
更新処理は上記の書き込み動作と同様にして実施され
る。さらに、制御回路１０は、キャッシュメモリ７及び
不揮発性メモリ８に残っている情報を消去すると共に、
転送対象としていた担体として担体１の識別子を不揮発
性メモリ８に書き込む（ステップ１０９）。After the transfer of this information, the control circuit 10 updates the history information written in the carrier 1 to the information indicating that the own device has performed the recording operation (step 108). This update process is performed in the same manner as the above-mentioned write operation. Further, the control circuit 10 erases the information remaining in the cache memory 7 and the non-volatile memory 8, and
The identifier of the carrier 1 as the carrier to be transferred is written in the non-volatile memory 8 (step 109).
【００１５】以上のように本実施の形態では、担体への
情報転送が未了であると情報転送判定回路５が判定し、
担体１から読み取った識別子と電源遮断前に最後に転送
対象としていた担体の識別子とが一致し、かつ担体１が
電源遮断後から現在に至るまで他の装置による記録動作
を受けていないと履歴判定回路６が判定したとき、不揮
発性メモリ８に残っていた情報を担体１に書き込む。As described above, in the present embodiment, the information transfer determination circuit 5 determines that the information transfer to the carrier has not been completed,
The history is determined that the identifier read from the carrier 1 matches the identifier of the carrier that was the last transfer target before power-off, and that the carrier 1 has not been subjected to recording operation by another device from power-off to the present. When the circuit 6 makes the determination, the information remaining in the non-volatile memory 8 is written to the carrier 1.
【００１６】したがって、電源の遮断によって未転送の
情報が生じた場合でも、電源の再投入後に本来記録すべ
き担体に転送し直すことで情報の整合性が得られ、また
誤って別の担体に情報を書き込んでしまうことがないの
で、信頼性を向上させることができる。Therefore, even if untransferred information is generated due to the interruption of the power supply, the consistency of the information can be obtained by transferring the information to the carrier to be originally recorded after the power is turned on again, and the information is erroneously transferred to another carrier. Since the information is never written, the reliability can be improved.
【００１７】なお、ステップ１１０において書き込み動
作が行われる場合には、ホストコンピュータからキャッ
シュメモリ７へ転送された情報が不揮発性メモリ８に送
られて記憶される。同時に、この情報が書込回路９によ
って記録信号に変換され、記録信号に基づいたレーザー
光が光ヘッド３から担体１に照射されることにより、情
報が担体１に書き込まれる。When the write operation is performed in step 110, the information transferred from the host computer to the cache memory 7 is sent to and stored in the non-volatile memory 8. At the same time, this information is converted into a recording signal by the writing circuit 9, and laser light based on the recording signal is applied to the carrier 1 from the optical head 3 to write the information on the carrier 1.
【００１８】そして、ステップ１０８と同様に担体１に
書き込まれた履歴情報が更新され、ステップ１０９と同
様にメモリ７、８に残っている情報が消去され担体１の
識別子がメモリ８に書き込まれる。これにより、上述し
た電源再投入後の動作が実現できる。なお、本実施の形
態では、キャッシュメモリ７と不揮発性メモリ８を別々
に設けているが、キャッシュメモリ７自身に不揮発性メ
モリを用いてメモリ８を兼ねるようにしてもよい。ま
た、本実施の形態では、情報記録担体１として光磁気デ
ィスクを例にとって説明したが、磁気ディスク等の他の
担体でもよいことは言うまでもない。Then, the history information written in the carrier 1 is updated as in step 108, the information remaining in the memories 7 and 8 is erased and the identifier of the carrier 1 is written in the memory 8 as in step 109. As a result, the operation after the power is turned on again can be realized. Although the cache memory 7 and the non-volatile memory 8 are separately provided in the present embodiment, a non-volatile memory may be used as the cache memory 7 itself so that the cache memory 7 also serves as the memory 8. Further, in the present embodiment, the magneto-optical disk is described as an example of the information recording carrier 1, but it goes without saying that another carrier such as a magnetic disk may be used.
【００１９】[0019]
【発明の効果】本発明によれば、不揮発性記憶手段、情
報転送判定手段、履歴判定手段及び書込手段を設け、担
体への情報転送が未了で、かつ装着されている担体が電
源の遮断前に転送対象としていた担体であると判定した
とき、不揮発性記憶手段に保持されている情報を担体に
書き込むことにより、突然の電源遮断によって未転送の
情報が生じた場合でも、電源の再投入後に本来記録すべ
き担体に転送し直すことで情報の整合性が得られる。ま
た、誤って別の担体に情報を書き込んでしまうことがな
いので、信頼性を向上させることができる。According to the present invention, the nonvolatile storage means, the information transfer determination means, the history determination means, and the writing means are provided, and the information transfer to the carrier is not completed and the mounted carrier is the power source. When it is determined that the carrier was the transfer target before shutting off, by writing the information held in the non-volatile storage means to the carrier, even if untransferred information occurs due to sudden power shutoff, the power is restored. Information consistency can be obtained by transferring again to the carrier to be originally recorded after the input. Further, since the information is not accidentally written on another carrier, the reliability can be improved.
【００２０】また、情報記録担体が固有の識別子と履歴
情報とを保持し、書込手段が担体に情報を書き込んだ後
に担体の保持する履歴情報を更新することにより、履歴
判定手段による判定を容易に行うことができる。Further, the information recording carrier holds the unique identifier and the history information, and the writing unit writes the information on the carrier and then updates the history information held by the carrier, whereby the judgment by the history judging unit is facilitated. Can be done.
【図１】 本発明の第１の実施の形態を示す情報記録装
置のブロック図である。FIG. 1 is a block diagram of an information recording apparatus showing a first embodiment of the present invention.
【図２】 図１の情報記録装置の動作を示すフローチャ
ート図である。FIG. 2 is a flowchart showing the operation of the information recording device of FIG.
１…情報記録担体、２…情報記録装置、３…光ヘッド、
４…読取回路、５…情報転送判定回路、６…履歴判定回
路、７…キャッシュメモリ、８…不揮発性メモリ、９…
書込回路、１０…制御回路。1 ... Information recording carrier, 2 ... Information recording device, 3 ... Optical head,
4 ... Read circuit, 5 ... Information transfer determination circuit, 6 ... History determination circuit, 7 ... Cache memory, 8 ... Non-volatile memory, 9 ...
Writing circuit, 10 ... Control circuit.
Claims (2)
転送すべき情報を電源の遮断時においても保持する不揮
発性記憶手段と、 情報記録担体への情報転送が完了しているかどうかを判
定する情報転送判定手段と、 現在装着されている担体が電源の遮断前に転送対象とし
ていた担体かどうかを判定する履歴判定手段と、 前記担体への情報転送が未了で、かつ装着されている担
体が電源の遮断前に転送対象としていた担体であると判
定されたとき、不揮発性記憶手段に保持されている情報
を担体に書き込む書込手段とを有することを特徴とする
情報記録装置。1. A non-volatile storage means for holding information to be transferred to a removable information record carrier from the device even when the power is turned off, and determining whether or not the information transfer to the information record carrier is completed. Information transfer determining means, history determining means for determining whether the currently mounted carrier is the carrier that was the transfer target before the power is turned off, and the information transfer to the carrier has not been completed and is mounted. An information recording apparatus comprising: a writing unit that writes information held in a non-volatile storage unit to a carrier when it is determined that the carrier is a carrier to be transferred before the power is turned off.
報記録担体から情報を読み取る読取手段を有し、 前記情報記録担体は、固有の識別子と、その担体に最後
に記録動作を施した情報記録装置を示す履歴情報とが書
き込まれたものであり、 前記履歴判定手段は、読取手段が担体から読み取った識
別子及び履歴情報に基づいて前記判定を行うものであ
り、 前記書込手段は、担体に情報を書き込んだ後に担体の保
持する履歴情報を更新するものであることを特徴とする
情報記録装置。2. The information recording apparatus according to claim 1, further comprising a reading unit for reading information from the information recording carrier, wherein the information recording carrier has a unique identifier and a recording operation last performed on the carrier. The history information indicating the information recording device is written, and the history determination means makes the determination based on the identifier and the history information read by the reading means from the carrier, and the writing means, An information recording apparatus for updating history information held by a carrier after writing information on the carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8129676A JPH09312084A (en) | 1996-05-24 | 1996-05-24 | Information recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8129676A JPH09312084A (en) | 1996-05-24 | 1996-05-24 | Information recording device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09312084A true JPH09312084A (en) | 1997-12-02 |
Family
ID=15015421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8129676A Pending JPH09312084A (en) | 1996-05-24 | 1996-05-24 | Information recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09312084A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1253365A1 (en) * | 2001-04-25 | 2002-10-30 | Veritas Ag | Hose |
| US6937815B1 (en) | 1998-06-22 | 2005-08-30 | Samsung Electronics Co., Ltd. | Method and apparatus for recording manufacturer information and for determining whether the manufacturer information is effective |
| US7039295B1 (en) | 1998-06-22 | 2006-05-02 | Samsung Electronics Co., Ltd. | Method and apparatus for recording manufacturer information and for determining whether the manufacturer information is effective |
| JP2007080323A (en) * | 2005-09-12 | 2007-03-29 | Sharp Corp | Image output device |
-
1996
- 1996-05-24 JP JP8129676A patent/JPH09312084A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6937815B1 (en) | 1998-06-22 | 2005-08-30 | Samsung Electronics Co., Ltd. | Method and apparatus for recording manufacturer information and for determining whether the manufacturer information is effective |
| US7039295B1 (en) | 1998-06-22 | 2006-05-02 | Samsung Electronics Co., Ltd. | Method and apparatus for recording manufacturer information and for determining whether the manufacturer information is effective |
| US7085475B1 (en) | 1998-06-22 | 2006-08-01 | Samsung Electronics Co., Ltd. | Method and apparatus for recording manufacturer information on a recording medium and for determining whether the manufacturer information is effective |
| US7228062B2 (en) | 1998-06-22 | 2007-06-05 | Samsung Electronics Co., Ltd. | Method and apparatus for recording manufacturer information on a recording medium and for determining whether the manufacturer information is effective |
| US7245823B2 (en) | 1998-06-22 | 2007-07-17 | Samsung Electronics Co., Ltd. | Method and apparatus for recording manufacturer information on a recording medium and for determining whether the manufacturer information is effective |
| US8437614B2 (en) | 1998-06-22 | 2013-05-07 | Samsung Electronics Co., Ltd. | Method and apparatus for recording manufacturer information on a recording medium and for determining whether the manufacturer information is effective |
| US8447166B2 (en) | 1998-06-22 | 2013-05-21 | Samsung Electronics Co., Ltd. | Method and apparatus for recording manufacturer information on a recording medium and for determining whether the manufacturer information is effective |
| US8538243B2 (en) | 1998-06-22 | 2013-09-17 | Samsung Electronics Co., Ltd. | Method and apparatus for recording manufacturer information on a recording medium and for determining whether the manufacturer information is effective |
| US8891940B2 (en) | 1998-06-22 | 2014-11-18 | Samsung Electronics Co., Ltd. | Method and apparatus for recording manufacturer information on a recording medium and for determining whether the manufacturer information is effective |
| EP1253365A1 (en) * | 2001-04-25 | 2002-10-30 | Veritas Ag | Hose |
| JP2007080323A (en) * | 2005-09-12 | 2007-03-29 | Sharp Corp | Image output device |
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