JPH0287370A - Method for managing defect of optical disk - Google Patents
Method for managing defect of optical diskInfo
- Publication number
- JPH0287370A JPH0287370A JP23711388A JP23711388A JPH0287370A JP H0287370 A JPH0287370 A JP H0287370A JP 23711388 A JP23711388 A JP 23711388A JP 23711388 A JP23711388 A JP 23711388A JP H0287370 A JPH0287370 A JP H0287370A
- Authority
- JP
- Japan
- Prior art keywords
- sector
- recording
- replacement
- defective
- alternate
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 30
- 230000007547 defect Effects 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title description 21
- 230000002950 deficient Effects 0.000 claims abstract description 29
- 238000007726 management method Methods 0.000 claims description 7
- 238000012795 verification Methods 0.000 abstract description 10
- 101100400452 Caenorhabditis elegans map-2 gene Proteins 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は追記可能な光ディスク、光磁気ディスク(以下
これらを併せて光ディスクという)の欠陥に起因するデ
ータの再記録の方法、所謂欠陥管理(デフェクトマネジ
メント)の方法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for re-recording data caused by a defect in a write-once optical disk or a magneto-optical disk (hereinafter collectively referred to as an optical disk), so-called defect management ( Defect management) methods.
追記可能型の光ディスクに対するデータの記録は以下の
ように行われている。光ディスクは第4図に示すように
径方向に複数のトラックTを有し、周方向に複数のセク
タSに分割されて管理され、データはセクタ単位で記録
され、また再生される。Data is recorded on a recordable optical disc as follows. As shown in FIG. 4, the optical disc has a plurality of tracks T in the radial direction, is divided into a plurality of sectors S in the circumferential direction, and is managed, and data is recorded and reproduced in units of sectors.
データ記録に際しては記録後直ちにそれを再生して記録
データの検証(ベリファイ)が行われ、補償可能な程度
にまで正しく記録が行われていない場合は予め用意され
ている交替セクタに記録される。When data is recorded, it is reproduced immediately after recording to verify the recorded data, and if the recording is not performed correctly to the extent that it can be compensated for, it is recorded in a pre-prepared replacement sector.
次に第5図に基づいて交替セクタの使用方法を説明する
。Next, a method of using the replacement sector will be explained based on FIG.
この図に示すように複数トラックを1グループとして各
グループに複数の1次交替セクタFASが用意されてい
る。記録、再生、検証を行った結果記録データに所定基
準を越える不良があった場合にはその記録を行ったセク
タのグループに用意された1次交替セクタFASの空領
域に記録し、同様の検証を行う。空領域のあるなしは後
に述べる交替マツプを調べることにより判る。これに再
び不良があれば他の1次交替セクタFASに対する記録
を行う。As shown in this figure, a plurality of tracks are grouped into one group, and a plurality of primary spare sectors FAS are prepared for each group. If there is a defect in the recorded data that exceeds a predetermined standard as a result of recording, playback, and verification, it is recorded in the empty area of the primary spare sector FAS prepared for the group of the sector where the recording was performed, and the same verification is performed. I do. The presence or absence of an empty area can be determined by checking the replacement map described later. If there is a defect again, recording is performed in another primary replacement sector FAS.
而して光ディスクの所定トラックには全グループについ
て共用する2次交替セクタSASが設けられており、記
録対象セクタが属するグループの1次交替セクタFAS
が総て使用されて再記録の余地がない場合はこの2次交
替セクタSAS中のセクタを使用して記録を行う。A predetermined track of the optical disc is provided with a secondary spare sector SAS that is shared by all groups, and a primary spare sector SAS of the group to which the recording target sector belongs is provided.
If all of the sectors are used and there is no room for re-recording, recording is performed using sectors in this secondary spare sector SAS.
2次交替セクタSASへの記録についても再生。The recording to the secondary spare sector SAS is also played back.
検証が行われ、不良があれば他のセクタに記録が行われ
る。不良のセクタは1次、2次とも消去しておく。Verification is performed, and if there is a defect, it is recorded in another sector. Defective sectors are erased on both the primary and secondary sectors.
1次交替セクタFAS、 2次交替セクタSASの利用
状況は所定トラックに設けられた交替マツプAMに記録
される。The usage status of the primary spare sector FAS and the secondary spare sector SAS is recorded in a spare map AM provided on a predetermined track.
データの再生時には光ディスクのドライブ装置へ外部か
ら再生指令の信号が与えられると、該信号に基づき再生
すべき領域を表す物理アドレス(トラック番号、セクタ
番号)を計算し、これを用いて交替マツプAMの内容を
調べ、その結果セクタの交替(本来のセクタへの書込の
外に1次交替セクタFAS、 2次交替セクタSASへ
の記録が行われていること)が行われてない場合は計算
とおりのアドレスへアクセスしてデータ再生を行い、交
替が行われている場合は交替先のセクタへアクセスして
データ再生を行う。When reproducing data, when a reproduction command signal is given to the optical disk drive device from the outside, the physical address (track number, sector number) representing the area to be reproduced is calculated based on the signal, and this is used to create a replacement map AM. Check the contents of the sector, and as a result, calculate if sector replacement (in addition to writing to the original sector, recording to the primary replacement sector FAS and secondary replacement sector SAS) has not been performed. The data is reproduced by accessing the correct address, and if replacement is being performed, accessing the replacement sector and reproducing data.
なお、交替マツプAMの内容は光ディスクをドライブ装
置に装填した段階でドライブ装置に備えられているメモ
リに読込まれており、セクタの交替の有無はこのメモリ
のデータを用いて調べられる。Note that the contents of the replacement map AM are read into a memory provided in the drive device when the optical disc is loaded into the drive device, and the presence or absence of sector replacement is checked using the data in this memory.
次に書替え(オーバライド)の場合について説明すると
、外部から指令信号が与えられると、それに基づき書替
すべき領域を表す物理アドレスをまず計算し、当該アド
レスが交替されているか否かを交替マツプAMの内容を
読込んでいる前記メモリによって調べる。交替がなけれ
ば計算したアドレスへアクセスして記録をし、前述した
ところと同様の再生1検証を行う。また検証の結果によ
り交替セクタへの記録を行う。Next, to explain the case of rewriting (override), when a command signal is given from the outside, the physical address representing the area to be rewritten is first calculated based on it, and the replacement map AM determines whether or not the address has been replaced. The content of is checked by the memory being read. If there is no replacement, the calculated address is accessed and recorded, and the same playback 1 verification as described above is performed. Also, recording is performed in a replacement sector based on the verification result.
交替がある場合は計算したアドレスに対する記録、再生
、検証を行った後、交替先のセクタへアクセスし、この
部分にも記録、再生、検証を行う。If there is a replacement, the calculated address is recorded, reproduced, and verified, and then the replacement sector is accessed, and recording, reproduction, and verification are performed in this area as well.
これはこの交替セクタを書替えないまま旧データを残し
ておくと、これが再生された場合に不都合を生じるから
である。This is because if old data is left without being rewritten in this replacement sector, inconvenience will occur when it is played back.
以上の方式とは異なり、2次交替セクタSASを設けな
い方式もある。これは各グループでの交替セクタを比較
的多く設けておき、自グループの交替セクタに記録の余
地がなくなった場合には相隣グループ等予め定められた
他グループの交替セクタを利用する交替セクタ共用方式
である。この場合にも交替マツプは光ディスクに記録さ
れ、再生。Unlike the above methods, there is also a method that does not provide a secondary spare sector SAS. In this method, a relatively large number of spare sectors are provided for each group, and when there is no room for recording in the spare sector of the own group, spare sectors of other groups determined in advance, such as neighboring groups, are used. It is a method. In this case, the replacement map is also recorded on the optical disc and can be played back.
書き替えは前同様の方式で行われる。Rewriting is performed in the same manner as before.
以上の2方式は共にマツプ方式と称される欠陥管理方式
であり、交替したセクタに関する情報をマツプとして備
えている点に特徴がある。これらの方式とは別にポイン
タ方式と称される方式がある。これは本来の記録領域の
セクタにはそのセクタに属する記録において不良があっ
た場合の処理の交替セクタのトラックアドレス、セクタ
アドレス(フォワードポインタという)を予め記録して
おき、また交替セクタには交替した元のセクタのトラッ
クアドレス、セクタアドレス(バックワードポインタと
いう)を予め記録しておく。なお、フォワードポインタ
については行き先交替セクタとして期待する領域又はそ
の先頭を示し、複数セクタの同時記録の際において複数
のセクタに交替を必要とすることが生じた場合にも対応
できるようになっている。Both of the above two methods are defect management methods called map methods, and are characterized in that information regarding replaced sectors is provided as a map. Apart from these methods, there is a method called a pointer method. This is because the track address and sector address (referred to as a forward pointer) of a replacement sector are recorded in advance in a sector of the original recording area for processing when there is a defect in the recording belonging to that sector, and the replacement sector is also recorded in the replacement sector. The track address and sector address (referred to as a backward pointer) of the original sector are recorded in advance. Note that the forward pointer indicates the area expected as the destination replacement sector or the beginning thereof, and can also be used in cases where multiple sectors need to be replaced when recording multiple sectors simultaneously. .
このような方式ではフォワードポインタ、又はバックワ
ードポインタにより交替先の又は元のセクタの情報が得
られるのである。In such a system, information about the replacement sector or the original sector can be obtained using a forward pointer or a backward pointer.
以上の如き従来の方式による場合、不良である交替セク
タは交替マツプに登録されないので検証の結果不良であ
るとして交替された交替セクタが再使用されることがあ
る。斯かる交替セクタはその原因にもよるが一般には再
び不良であると判定されて他の交替セクタに交替される
ことが多い。In the conventional system as described above, a defective replacement sector is not registered in the replacement map, so a replacement sector that is found to be defective after verification may be reused. Although it depends on the cause, such a replacement sector is generally determined to be defective again and is often replaced with another replacement sector.
従って当然不良の交替セクタへの記録、再生、検証が無
駄になるということになる。Naturally, therefore, recording, reproducing, and verifying the defective replacement sector are wasted.
本発明は斯かる無駄をなくすことにより高速処理を可能
とした光ディスクの欠陥管理方法を提供することを目的
とする。An object of the present invention is to provide an optical disc defect management method that enables high-speed processing by eliminating such waste.
本発明に係る光ディスクの欠陥管理方法は、不良の交替
セクタのリストを作成して光ディスクに記録しておき、
セクタの交替の必要が生じた場合にこのリストを参照し
て、不良リストを使用しないようにすることを特徴とす
る。The optical disc defect management method according to the present invention includes creating a list of defective replacement sectors and recording it on the optical disc;
The present invention is characterized in that when it becomes necessary to replace a sector, this list is referred to and the defective list is not used.
交替セクタに不良セクタがあった場合は光ディスクの所
定領域にこれを記録する。光デイスク装填時にはこの記
録を予め読出しておき、交替セクタへの記録が必要とな
った場合にこれを参照し、不良の交替セクタを避けて交
替マツプに登録されていない他の交替セクタへの記録を
行う。If there is a defective sector in the replacement sector, it is recorded in a predetermined area of the optical disc. This record is read in advance when loading an optical disk, and when it becomes necessary to record to a replacement sector, it is referred to and recorded to other replacement sectors that are not registered in the replacement map, avoiding the defective replacement sector. I do.
以下本発明をその実施例を示す図面に基づいて詳述する
。第1図は本発明を実施するための光デイスクドライブ
装置の要部の構成を示すブロック図である。光ディスク
(図示せず)からの反射光は再生信号検出部lに捉えら
れ、ここで波形成形5誤り訂正等の処理が行われ、再生
信号を所要部に与える。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on drawings showing embodiments thereof. FIG. 1 is a block diagram showing the configuration of essential parts of an optical disk drive device for implementing the present invention. Reflected light from an optical disk (not shown) is captured by a reproduction signal detection section 1, where processing such as waveform shaping 5 and error correction is performed, and a reproduction signal is provided to a required section.
光ディスクは第2図に示すように、不良交替セクタ記録
エリアDARが設けられている点で第5図の従来のもの
と相異している。この光ディスクはドライブ装置に装填
された際に不良交替セクタ記録エリアDARの内容が不
良交替セクタメモリ3に読込まれる。また交替マツプA
Mの内容は交替マツプメモリ2に読込まれる。As shown in FIG. 2, the optical disc is different from the conventional one shown in FIG. 5 in that a defective replacement sector recording area DAR is provided. When this optical disc is loaded into a drive device, the contents of the defective spare sector recording area DAR are read into the bad spare sector memory 3. Also, replacement map A
The contents of M are read into the alternate map memory 2.
而して第2図は記録時における書込制御部4の処理手順
を示すフローチャートである。書込制御部4は外部から
その指令を受けると、指令信号中に含まれる記録セクタ
に関する情報から光ディスクにおける物理アドレス(ト
ラックアドレス、セクタアドレス)を計算し、ここに記
録する(ステップ#1)。そして記録情報を直ちに再生
し検証する(#2)。検証の結果記録したセクタが不良
でないと判定された場合は処理を終える。不良であると
判定された場合は交替マツプメモリ2を参照しく13)
、次に使用すべき交替セクタを調べる。交替セクタが
決まると不良交替セクタメモリ3を参照しく#4) 、
当該交替セクタがそのリストにあるか否かを調べ(#5
) 、不良セクタであった場合はステップ#3に戻り、
次順の交替セクタを探し同様の処理を反復する。FIG. 2 is a flowchart showing the processing procedure of the write control section 4 during recording. When the write control unit 4 receives the command from the outside, it calculates a physical address (track address, sector address) on the optical disc from information regarding the recording sector included in the command signal, and records it there (step #1). Then, the recorded information is immediately reproduced and verified (#2). If it is determined that the recorded sector is not defective as a result of the verification, the process ends. If it is determined to be defective, please refer to replacement map memory 213)
, then find out which replacement sector should be used. Once the replacement sector is determined, refer to defective replacement sector memory 3 (#4).
Check whether the replacement sector is on the list (#5
), if it is a bad sector, return to step #3,
Similar processing is repeated to find the next replacement sector.
不良セクタでなかった場合は記録しく116) 、次に
再生、検証を行い(#7) 、この交替セクタに不良が
なければ処理を終える。不良セクタである場合は不良交
替セクタメモリ3にそれを書加えると共に、不良交替セ
クタ記録エリアDARにそれを書込む。そしてステップ
113へ戻る。なお、不良の交替セクタは記録を消去す
る。If it is not a defective sector, it is recorded (116), then reproduced and verified (#7), and if the replacement sector is not defective, the process ends. If it is a bad sector, it is added to the bad replacement sector memory 3 and also written to the bad replacement sector recording area DAR. Then, the process returns to step 113. Note that the recording of the defective replacement sector is erased.
以上の処理をすることで不良セクタとして判明している
ところに記録をし、これを再生し、検証し、不良セクタ
であることを知って別の交替セクタに記録をする、とい
う無駄な処理を回避できる。By performing the above processing, you can avoid the wasteful process of recording in a sector that is known to be a bad sector, playing it back, verifying it, knowing that it is a bad sector, and recording in another replacement sector. It can be avoided.
また、不良交替セクタの記録はメモリ3において更新さ
れるので不都合を生じないことは勿論、光ディスクのエ
リアDARも更新されていくので次回の装填時にも不良
交替セクタを排除して利用できる。Furthermore, since the record of the defective replacement sector is updated in the memory 3, no inconvenience will occur, and since the area DAR of the optical disk is also updated, the defective replacement sector can be excluded and used the next time it is loaded.
その他、書替、再生の際の処理は交替マツプ酬又は交替
マツプメモリ2の内容を参照して従来同様に行われる。Other processes for rewriting and reproducing are performed in the same manner as in the conventional art with reference to the spare map reserve or the contents of the spare map memory 2.
本発明は以上のように実施されるものであるので、不良
交替セクタに対する記録、再生、検証の処理が除外され
、その分交替処理が高速化される効果が得られる。Since the present invention is implemented as described above, the processing of recording, reproducing, and verifying the defective replacement sector is excluded, and the replacement processing speed can be increased accordingly.
第1図は本発明方法の実施に使用する装置のブロック図
、第2図は本発明に係る光ディスクの記録フォーマント
図、第3図は記録時の処理手順を示すフローチャート、
第4図は光ディスクのトラックとセクタの説明図、第5
図は従来の光ディスクの記録フォーマット図である。
2・・・交替マツプメモリ 3・・・不良交替セクタ4
・・・書込制御部
DAR
・・・不良交替セクタ記録エリ
ア
なお、
図中、
同一符号は同一、又は相当部分を
示す。FIG. 1 is a block diagram of an apparatus used to implement the method of the present invention, FIG. 2 is a recording format diagram of an optical disc according to the present invention, and FIG. 3 is a flowchart showing the processing procedure during recording.
Figure 4 is an explanatory diagram of the tracks and sectors of an optical disc, Figure 5
The figure is a recording format diagram of a conventional optical disc. 2...Replacement map memory 3...Bad replacement sector 4
. . . Write control unit DAR . . . Defective replacement sector recording area In the figures, the same reference numerals indicate the same or corresponding parts.
Claims (1)
場合には交替セクタに記録し、また再生、検証を行う光
ディスクの欠陥管理方法において、 前記検証によって不良であると判定された 交替セクタのリストを作成して光ディスクに記録し、交
替セクタへの記録に先立って該リストを参照し、リスト
中の不良交替セクタを交替記録に用いないことを特徴と
する光ディスクの欠陥管理方法。[Claims] 1. A defect management method for an optical disc in which data recorded in a sector is reproduced and verified, and if the data is found to be defective, it is recorded in a replacement sector, and the data is reproduced and verified, further comprising the steps of: An optical disc characterized in that a list of replacement sectors determined to be defective is created and recorded on the optical disc, the list is referred to before recording to the replacement sectors, and the bad replacement sectors in the list are not used for replacement recording. Defect management methods.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23711388A JPH0287370A (en) | 1988-09-21 | 1988-09-21 | Method for managing defect of optical disk |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23711388A JPH0287370A (en) | 1988-09-21 | 1988-09-21 | Method for managing defect of optical disk |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0287370A true JPH0287370A (en) | 1990-03-28 |
Family
ID=17010607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23711388A Pending JPH0287370A (en) | 1988-09-21 | 1988-09-21 | Method for managing defect of optical disk |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0287370A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6341109B1 (en) | 1999-02-05 | 2002-01-22 | Nec Corporation | Defective area replacement method and information writing/reading device |
WO2011099182A1 (en) * | 2010-02-12 | 2011-08-18 | 日立コンシューマエレクトロニクス株式会社 | Media record/play device and media record/play method |
JP2011243280A (en) * | 2011-08-26 | 2011-12-01 | Hitachi-Lg Data Storage Inc | Medium recording and reproducing device, and medium recording and reproducing method |
JP2011243245A (en) * | 2010-05-17 | 2011-12-01 | Hitachi-Lg Data Storage Inc | Recording method, reproducing method, recording device and reproducing device |
-
1988
- 1988-09-21 JP JP23711388A patent/JPH0287370A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6341109B1 (en) | 1999-02-05 | 2002-01-22 | Nec Corporation | Defective area replacement method and information writing/reading device |
WO2011099182A1 (en) * | 2010-02-12 | 2011-08-18 | 日立コンシューマエレクトロニクス株式会社 | Media record/play device and media record/play method |
CN102511063A (en) * | 2010-02-12 | 2012-06-20 | 日立民用电子株式会社 | Media record/play device and media record/play method |
US8446806B2 (en) | 2010-02-12 | 2013-05-21 | Hitachi Consumer Electronics Co., Ltd. | Media record/play device and media record/play method |
US8750085B2 (en) | 2010-02-12 | 2014-06-10 | Hitachi Consumer Electronics Co., Ltd. | Media record/play device and media record/play method |
JP2011243245A (en) * | 2010-05-17 | 2011-12-01 | Hitachi-Lg Data Storage Inc | Recording method, reproducing method, recording device and reproducing device |
JP2011243280A (en) * | 2011-08-26 | 2011-12-01 | Hitachi-Lg Data Storage Inc | Medium recording and reproducing device, and medium recording and reproducing method |
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