JP3043355B2 - Update partial copy method for non-rewritable media - Google Patents
Update partial copy method for non-rewritable mediaInfo
- Publication number
- JP3043355B2 JP3043355B2 JP2021335A JP2133590A JP3043355B2 JP 3043355 B2 JP3043355 B2 JP 3043355B2 JP 2021335 A JP2021335 A JP 2021335A JP 2133590 A JP2133590 A JP 2133590A JP 3043355 B2 JP3043355 B2 JP 3043355B2
- Authority
- JP
- Japan
- Prior art keywords
- medium
- vtoc
- copying
- input
- labels
- 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
Links
Landscapes
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
- Management Or Editing Of Information On Record Carriers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は書換不可媒体の更新部分の複写を行う方式に
関する。Description: TECHNICAL FIELD The present invention relates to a method for copying an updated portion of a non-rewritable medium.
従来、この種の媒体複写方式は、媒体全体の複写のみ
であった。Heretofore, this type of medium copying method has been only for copying the entire medium.
上述した従来の書換不可媒体の複写方式では、入力媒
体中のVTOC及びデータ部の全てを物理的に複写するた
め、出力側の媒体は出荷後に一度だけ初期化されたもの
でなければならないという制限がある。In the above-mentioned conventional non-rewritable medium copying method, since all of the VTOC and data part in the input medium are physically copied, the output medium must be initialized only once after shipment. There is.
また、一度しか複写できないため、入力側媒体が満杯
に近い状態でないと媒体が無駄になってしまう。このた
め、記憶容量が大きい場合には、満杯に近い状態までデ
ータを書き込むにはかなりの時間を要し、この間に障害
が発生すると、バックアップが全く存在しない状況が発
生するという問題がある。Further, since copying can be performed only once, the medium is wasted unless the input side medium is almost full. For this reason, when the storage capacity is large, it takes a considerable time to write data to a state close to being full, and if a failure occurs during this time, there is a problem that a situation in which no backup exists exists.
本発明の書換不可媒体の更新部分複写方式の構成は、
１ボリュームに１ファイルのみを割り付け、そのファイ
ルのデータを追加した時に、現在のデータの終端アドレ
ス等を含むファイルラベルVTOCに追記し、そのVTOCの最
後に書かれたファイルラベルを有効とするような光ディ
スク等の書換不可媒体を含むシステムにおいて、媒体複
写の対象となる出力媒体のVTOC中のラベル全てと、入力
媒体のラベルのうち、VTOCの先頭から前記出力媒体のVT
OC中の全てのラベルの数と同じ数のラベルを比較し、同
一であればその出力媒体は、前記入力媒体を以前に複写
したものとみなすVTOC比較手段と、前記入力媒体のVTOC
中の最終ラベルと前記出力媒体の最終ラベル中の最終書
き込みアドレスとを比較し、その差となる領域を複写対
象領域とする更新部分抽出手段と、指定された領域につ
いて前記入力媒体から前記出力媒体へ物理的に複写する
複写手段と、前記VTOC比較手段を用いて、前記出力媒体
が以前に入力媒体を複写したものであるか否かを判断
し、もし以前に複写したものであれば、前記更新部分抽
出手段を用いて複写対象領域を求め、その求めた領域を
パラメータとして前記複写手段に渡してデータ部の複写
を行い、前記入力VTOCの更新部分の領域をパラメータと
して前記複写手段に渡してVTOC部の複写を行う更新部分
複写制御手段とを含むことを特徴とする。The configuration of the updated partial copy method of the non-rewritable medium of the present invention is as follows.
Allocate only one file to one volume, and when adding data of that file, add to the file label VTOC including the end address of the current data and make the file label written at the end of the VTOC valid. In a system including a non-rewritable medium such as an optical disk, all the labels in the VTOC of the output medium to be copied and the VT of the output medium from the top of the VTOC among the labels of the input medium.
The same number of labels as the number of all labels in the OC are compared, and if they are the same, the output medium is a VTOC comparing means for assuming that the input medium has been previously copied, and the VTOC comparison means of the input medium.
An updated portion extracting means for comparing the final label in the output medium with the final write address in the final label of the output medium, and setting an area corresponding to the difference as an area to be copied; and Using the copying means for physically copying to, and using the VTOC comparing means to determine whether or not the output medium is a copy of the input medium previously. A copy target area is obtained by using the updated part extracting means, the obtained area is passed to the copying means as a parameter to copy the data part, and the area of the updated part of the input VTOC is passed to the copying means as a parameter. Update copy control means for copying the VTOC portion.
次に、本発明について図面を参照して説明する。第１
図は本発明の一実施例の構成を表わす図である。Next, the present invention will be described with reference to the drawings. First
FIG. 1 is a diagram showing the configuration of one embodiment of the present invention.
１−１は入力側となる入力媒体であり、入力媒体の条
件は、媒体中に１ファイルのみが割り当てられているも
のであることが必要である。1-1 is an input medium on the input side, and the condition of the input medium needs to be such that only one file is allocated in the medium.
１−２は出力側となる出力媒体であり、出力媒体の条
件は、媒体初期化直後であるか、以前に入力媒体１−１
を一度以上、更新部分複写を行ったものであることが必
要である。1-2 is an output medium on the output side, and the condition of the output medium is either immediately after the initialization of the medium or before the input medium 1-1.
Must be updated more than once.
１−３はVTOC比較手段であり、出力媒体１−１中のラ
ベルと入力媒体１−２中のラベルのうち、先頭から出力
側媒体中のラベル数と同じ数のラベルを比較し、一致し
ている場合のみ、複写対象入出力媒体であるとみなす。1-3 is a VTOC comparing means, which compares the labels in the output medium 1-1 and the labels in the input medium 1-2 with the same number of labels as the number of labels in the output side medium from the head and finds a match. Only if the input / output medium is a copy target input / output medium.
１−４は更新部分抽出手段であり、入力媒体と出力媒
体のそれぞれから有効ラベルを取り出し、２つの有効ラ
ベル中の最終書き込みアドレスを比較し、その差となる
領域を複写対象領域とみなす。1-4 is an updated portion extracting means, which extracts effective labels from each of the input medium and the output medium, compares the last write addresses in the two effective labels, and regards an area corresponding to the difference as a copy target area.
１−５は複写手段であり、更新部分抽出手段１−４が
抽出した複写対象領域について、複写処理を行う。A copying unit 1-5 performs a copying process on the copy target area extracted by the updated part extracting unit 1-4.
また、入力側VTOC中の更新部分についても、複写処理
を行う。The copying process is also performed on the updated portion in the input VTOC.
１−６は更新部分複写制御手段であり、更新部分複写
制御手段は、VTOC比較手段により、入出力媒体が複写対
象媒体か否かを判断し、複写対象媒体であれば、更新部
分抽出手段により、複写対象領域を入手し、複写対象領
域を複写手段に渡して複写処理を行い、複写処理が正常
終了したら、入力媒体のVTOCの更新部分を複写手段に渡
して、VTOCの複写処理を行う。Reference numeral 1-6 denotes an updated partial copy control means. The updated partial copy control means determines whether or not the input / output medium is a copy target medium by a VTOC comparison means. Then, an area to be copied is obtained, and the area to be copied is passed to the copying means to perform the copying process. When the copying process is completed normally, the updated portion of the VTOC of the input medium is passed to the copying means to perform the copying process of the VTOC.
以上説明したように本発明は、書換不可媒体に更新が
ある毎に、随時更新部分複写を実行することにより、出
力側媒体は常に入力側媒体と物理的にも完全に一致した
バックアップ媒体とすることが可能となる効果がある。As described above, according to the present invention, every time an update is performed on a non-rewritable medium, an update partial copy is executed as needed, so that the output side medium is always a backup medium physically and completely identical to the input side medium. This has the effect that it becomes possible.
第１図は本発明の一実施例の全体構成図である。 １−１……入力媒体、１−２……出力媒体、１−３……
VTOC比較処理、１−４……更新部分抽出手段、１−５…
…複写手段、１−６……更新部分複写制御手段。FIG. 1 is an overall configuration diagram of one embodiment of the present invention. 1-1 ... input medium, 1-2 ... output medium, 1-3 ...
VTOC comparison processing, 1-4 ... updated part extraction means, 1-5 ...
... copy means, 1-6 ... updated partial copy control means.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｇ１１Ｂ 27/02 Ｇ１１Ｂ 27/02 Ｋ 27/034 Ｚ (56)参考文献 特開 平３−259324（ＪＰ，Ａ) 特開 平２−205944（ＪＰ，Ａ) 特開 平１−248383（ＪＰ，Ａ) 特開 平１−290170（ＪＰ，Ａ) 特開 昭63−279482（ＪＰ，Ａ) 特開 昭64−60883（ＪＰ，Ａ) 特開 昭62−273688（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G06F 12/00 G06F 3/06 G06F 3/08 G11B 27/02 G11B 27/034 ────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI G11B 27/02 G11B 27/02 K 27/034 Z (56) References JP-A-3-259324 (JP, A) JP-A JP-A-2-205944 (JP, A) JP-A-1-248383 (JP, A) JP-A-1-290170 (JP, A) JP-A-63-279482 (JP, A) JP-A-64-60883 (JP, A A) JP-A-62-273688 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) G06F 12/00 G06F 3/06 G06F 3/08 G11B 27/02 G11B 27/034
Claims (1)
け、そのファイルにデータを追加した時に、現在のデー
タの終端アドレス等を含むファイルラベルをVTOCに追記
し、そのVTOCの最後に書かれたファイルラベルを有効と
するような光ディスク等の書換不可媒体を含むシステム
において、媒体複写の対象となる出力媒体のVTOC中のラ
ベル全てと、入力媒体のラベルのうち、VTOCの先頭から
前記出力媒体のVTOC中の全てのラベルの数と同じ数のラ
ベルを比較し、同一であればその出力媒体は、前記入力
媒体を以前に複写したものとみなすVTOC比較手段と、前
記入力媒体のVTOC中の最終ラベルと前記出力媒体の最終
ラベル中の最終書き込みアドレスとを比較し、その差と
なる領域を複写対象領域とする更新部分抽出手段と、指
定された領域について前記入力媒体から前記出力媒体へ
物理的に複写する複写手段と、前記VTOC比較手段を用い
て、前記出力媒体が以前に入力媒体を複写したものであ
るか否かを判断し、もし以前に複写したものであれば、
前記更新部分抽出手段を用いて複写対象領域を求め、そ
の求めた領域をパラメータとして前記複写手段に渡して
データ部の複写を行い、前記入力VTOCの更新部分の領域
をパラメータとして前記複写手段に渡してVTOC部の複写
を行う更新部分複写制御手段とを含むことを特徴とする
書換不可媒体における更新部分複写方式。When only one file is allocated to one volume and data is added to the file, a file label including the end address of the current data is added to the VTOC, and a file label written at the end of the VTOC is added. In a system including a non-rewritable medium such as an optical disk that validates, all of the labels in the VTOC of the output medium to be copied and the labels of the input medium, from the top of the VTOC in the VTOC of the output medium, Compare the same number of labels as the number of all labels, and if they are the same, the output medium is a VTOC comparing unit that considers the input medium as a previously copied one; and the last label in the VTOC of the input medium is An updated portion extracting means for comparing a final write address in a final label of the output medium with a difference area as a copy target area; Using the copying means for physically copying from the medium to the output medium and the VTOC comparing means to determine whether the output medium is a copy of the input medium previously, and if so, If,
Using the updated portion extracting means, a copy target area is obtained, and the obtained area is passed to the copying means as a parameter to copy the data portion, and the area of the updated portion of the input VTOC is passed to the copying means as a parameter. Updated copy control means for copying a VTOC portion by using an updated partial copy control means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021335A JP3043355B2 (en) | 1990-01-30 | 1990-01-30 | Update partial copy method for non-rewritable media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021335A JP3043355B2 (en) | 1990-01-30 | 1990-01-30 | Update partial copy method for non-rewritable media |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03225450A JPH03225450A (en) | 1991-10-04 |
| JP3043355B2 true JP3043355B2 (en) | 2000-05-22 |
Family
ID=12052256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2021335A Expired - Fee Related JP3043355B2 (en) | 1990-01-30 | 1990-01-30 | Update partial copy method for non-rewritable media |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3043355B2 (en) |
-
1990
- 1990-01-30 JP JP2021335A patent/JP3043355B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03225450A (en) | 1991-10-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |