JPH02103781A - Defective block substitution processing system for magnetic disk controller - Google Patents

Defective block substitution processing system for magnetic disk controller

Info

Publication number
JPH02103781A
JPH02103781A JP25627888A JP25627888A JPH02103781A JP H02103781 A JPH02103781 A JP H02103781A JP 25627888 A JP25627888 A JP 25627888A JP 25627888 A JP25627888 A JP 25627888A JP H02103781 A JPH02103781 A JP H02103781A
Authority
JP
Japan
Prior art keywords
defective
magnetic disk
block
sector
track
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
Application number
JP25627888A
Other languages
Japanese (ja)
Inventor
Yoshihiko Sasaki
佐々木 義彦
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP25627888A priority Critical patent/JPH02103781A/en
Publication of JPH02103781A publication Critical patent/JPH02103781A/en
Pending legal-status Critical Current

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  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To shorten the substitution processing time by selecting another block in the same cylinder as a defective block as the block with which the defective block should be substituted and substituting the defective block with this selected block. CONSTITUTION:When defective sectors 3 and 4 are found at the time of accessing a track 2 on a magnetic disk face 1-1, defective sectors 3 and 4 are substituted with alternative sectors 7 and 8 on a track in the same cylinder as sectors 3 and 4 on a magnetic disk face 1-n as shown by the broken line of the arrow. When a defective sector 5 is found at the time of accessing a track on a magnetic disk face 1-3, this defective sector 5 is substituted with an alternative sector 9 on the track 10 of the magnetic disk face 1-n in the same cylinder. That is, defective sectors are substituted with another sectors in the same cylinder. Thus, the substitution processing is performed without seek operation, and therefore, the time for this processing is shortened.

Description

【発明の詳細な説明】 〔産業上の利用分野] 本発明は、磁気ディスク制御装置の欠陥ブロック代替処
理方式に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a defective block replacement processing method for a magnetic disk control device.

〔従来の技術〕[Conventional technology]

周知のように、磁気ディスク装置は複数の磁気ディスク
円板を備え、各ディスク円板の表裏面において回転軸を
中心とする同心円に治って情報の読み書きを行うもので
、上記同心円は1〜ラツクと呼ばれている。情報の読み
書きはこのトラックをさらに分割したセクタという単位
で行なわれる。
As is well known, a magnetic disk device is equipped with a plurality of magnetic disk disks, and reads and writes information by forming concentric circles around the rotational axis on the front and back surfaces of each disk disk, and the above concentric circles are 1 to 100 degrees. It is called. Information is read and written in units called sectors, which are further divided into these tracks.

このような磁気ディスク装置において、セクタあるいは
(〜ラック〈以下、これらを総称してブロックという)
のいずれかに情報の読み書きが不能となった欠陥ブロッ
クが取扱いの不注意や経年変化等の原因によって発生す
ることがある。欠陥ブロックが発生した場合、この欠陥
ブロックを有する磁気ディスク円板を交換すればよいが
、磁気ディスク円板は高価である。そこで、磁気ディス
ク円板自体を交換するのではなく、欠陥ブロックを他の
正常なブロックに代替えさせる方法が従来から実施され
ている。
In such magnetic disk devices, sectors or racks (hereinafter collectively referred to as blocks)
A defective block in which information cannot be read or written may occur due to carelessness in handling, deterioration over time, or other causes. When a defective block occurs, the magnetic disk disk having the defective block can be replaced, but magnetic disk disks are expensive. Therefore, instead of replacing the magnetic disk disk itself, a method has been implemented in which the defective block is replaced with another normal block.

この欠陥ブロックの代替処理は磁気ディスク装置におけ
る情報の読み書きを制御する磁気ディスク制御I装置内
で実施される。
This replacement process for defective blocks is performed within the magnetic disk control I device that controls reading and writing of information in the magnetic disk device.

第2図は従来のおける欠陥ブロックの代替処理方法の一
例を説明するための説明図であり、複数の磁気ディスク
而21−1〜21−nのうち例えば21−1のトラック
22をアクセスした時、該l−ラック22が欠陥1〜ラ
ツクであった場合、回転軸近傍に配置した代替シリンダ
領域23の中の欠陥トラック22と同一面の他の1〜ラ
ック24−1に欠陥トラック22を代替えさせるように
したものである。
FIG. 2 is an explanatory diagram for explaining an example of a conventional alternative processing method for defective blocks. , if the l-rack 22 is defective 1~rack, replace the defective track 22 with another 1~rack 24-1 on the same surface as the defective track 22 in the replacement cylinder area 23 arranged near the rotation axis. It was designed so that

第3図は、従来における代替処理方法の他の例を説明す
るだめの説明図であり、第2図の例と同様に複数の磁気
ディスク而21−1〜21−nの回転軸近傍に代替シリ
ンダ領域23を配置すると共に、各磁気ディスク面の各
トラック内にも代替セクタ25を配置し、例えば磁気デ
ィスク而211のトラック22をアクセスした時、この
トラック22内のセクタ26が欠陥セクタであった場合
、この欠陥セクタ26を代替セクタ25に代替えさせ、
さらに同一トラック22内に別の欠陥セクタ27が発見
されたならば、代替シリンダ領域23の中の欠陥セクタ
27と同一面の代替セクタ28に欠陥セクタ27を代替
えさせるようにしたちのである。
FIG. 3 is an explanatory diagram for explaining another example of the conventional alternative processing method. Similar to the example of FIG. In addition to arranging the cylinder area 23, an alternative sector 25 is also arranged in each track on each magnetic disk surface. For example, when the track 22 of the magnetic disk 211 is accessed, the sector 26 in this track 22 is a defective sector. If the defective sector 26 is replaced with a replacement sector 25,
Furthermore, if another defective sector 27 is found within the same track 22, the defective sector 27 is replaced by a replacement sector 28 on the same side as the defective sector 27 in the replacement cylinder area 23.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかし、第2図および第3図で説明したいずれの代替処
理方法においても、欠陥セクタあるいは欠陥トラックが
存在するトラックとは別の1〜ラツクに代替えさせるた
め(すなわち、別のシリンダに代替えさせるため〉代替
処理時にシーク動作を伴うものとなり、代替処理時間が
長くなるという問題があった。
However, in any of the alternative processing methods explained in FIG. 2 and FIG. > There is a problem in that the alternative processing involves a seek operation, which lengthens the alternative processing time.

本発明は上記のような問題点を解澗するためになされた
もので、代替処理時間を短くすることがてきる磁気ディ
スク制御11g置の欠陥ブロック代替処理方式を提供す
ることを目的とする。
The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a defective block replacement processing method for a magnetic disk controller 11g that can shorten the replacement processing time.

〔課題を解決するための手段] 本発明による欠陥ブロック代替処理方式は、欠陥ブロッ
ク(欠陥セクタ3,4.5)を代替えするブロックを該
欠陥ブロックと同一シリンダ内の他のブロック(代替セ
クタ7.8.9)に選定し、この選定したブロック(代
替セクタ7.8.9)に上記欠陥ブロック(欠陥セクタ
3,4.5)を代替えさせるようにしたものである。
[Means for Solving the Problems] The defective block replacement processing method according to the present invention replaces a block to be replaced with a defective block (defective sectors 3, 4.5) by replacing it with another block (replacement sector 7) in the same cylinder as the defective block. .8.9), and the selected block (alternative sector 7.8.9) is substituted for the defective block (defective sector 3, 4.5).

(作用〕 欠陥ブロック(欠陥セクタ3,4.5>は該欠陥ブロッ
クと同一シリンダ内の他のブロック(代替セクタ7.8
.9)に代替えされる。従って、シーク動作は発生せず
、短時間で代替処理を終了することができる。
(Operation) The defective block (defective sectors 3, 4.5) is replaced by another block (substitute sector 7.8) in the same cylinder as the defective block.
.. 9) will be replaced. Therefore, no seek operation occurs, and the alternative processing can be completed in a short time.

(実施例) 第1図は本発明による代替処理方式を説明するための説
明図である。図において、1−1〜1nは磁気ディスク
面、2は磁気ディスク面1−1における任意のトラック
、3および4はトラック2の中の欠陥セクタ、5は磁気
ディスク面1−3におけるトラック6内の欠陥セクタ、
7〜9は磁気ディスク面1−nにおけるトラック10に
割当てられた代替セクタである。
(Example) FIG. 1 is an explanatory diagram for explaining an alternative processing method according to the present invention. In the figure, 1-1 to 1n are magnetic disk surfaces, 2 is an arbitrary track on the magnetic disk surface 1-1, 3 and 4 are defective sectors in track 2, and 5 is in track 6 on the magnetic disk surface 1-3. defective sectors,
7 to 9 are alternative sectors assigned to the track 10 on the magnetic disk surface 1-n.

ここで、トラック2,6.10は同一シリンダに属して
いる。
Here, tracks 2, 6, and 10 belong to the same cylinder.

まず、磁気ディスク面1−1におけるトラック2をアク
セスした時、欠陥セクタ3.4が発見されたならば、こ
の欠陥セクタ3,4は破線の矢印で示すように磁気ディ
スク面1−nにおける同シリンダ内のトラック10の代
替セクタ7.8に代替えされる。また、磁気ディスク面
1−3におけるトラック6をアクセスした時、欠陥セク
タ5が発見されたならば、この欠陥セクタ5は同一シリ
ンダ内の磁気ディスク面1−nのトラック10の代替セ
クタ9に代替えされる。
First, if defective sectors 3 and 4 are found when track 2 on magnetic disk surface 1-1 is accessed, these defective sectors 3 and 4 are located at the same position on magnetic disk surface 1-n as shown by the dashed arrow. It is replaced by a replacement sector 7.8 of the track 10 in the cylinder. Furthermore, if a defective sector 5 is found when accessing the track 6 on the magnetic disk surface 1-3, this defective sector 5 is replaced with the substitute sector 9 of the track 10 on the magnetic disk surface 1-n in the same cylinder. be done.

すなわち、欠陥セクタは同一シリンダ内の他のセクタに
代替えされる。従って、シーク動作を伴うことなく代替
処理を行うことが可能になり、そのための時間も大幅に
短縮される。また、シークミスも発生する余地がないた
め、信頼性も向上する。
That is, the defective sector is replaced with another sector within the same cylinder. Therefore, it becomes possible to perform alternative processing without a seek operation, and the time required for this processing is also significantly shortened. Furthermore, since there is no room for seek errors to occur, reliability is also improved.

なお、上記説明では代替セクタを最下層の磁気ディスク
面1−nに選定しているが、同一シリンダ内であればど
の階層の磁気ディスク面に選定しでもよい。
In the above description, the alternative sector is selected on the lowest magnetic disk surface 1-n, but it may be selected on any layer of the magnetic disk surface within the same cylinder.

さらに、代替セクタを選定している磁気ディスり而は1
つとしているが、2つ以上であってもよい。
Furthermore, the magnetic disk that selects the alternative sector is 1
However, there may be two or more.

〔発明の効果〕〔Effect of the invention〕

以」二説明したように本光明によれば、欠陥ブロックは
同一シリンダ内の他のブロックに代替させるようにした
ため、代替処即時にシーク動作が不要となり、代替処理
時間を短縮できるという効果がある。また、シークミス
が発生する余地がなくなるため、信頼性も向上づ−ると
いう効果がある。
As explained above, according to this Komei, a defective block is replaced with another block in the same cylinder, so there is no need for a seek operation immediately in the replacement process, which has the effect of shortening the replacement processing time. . Furthermore, since there is no room for seek errors to occur, reliability is also improved.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明による代替処理方式を説明するための説
明図、第2図a5よび第3図は従来の代替処理方式を説
明するための説明図である。 1−1〜1−n、21−1〜21−n・・・磁気ディス
ク面、2.6.10・・・トラック、3,4.5・・・
欠陥セクタ、7.8.9・・・代替セクタ、23・・・
代替シリンダ領域。 代理人  大君 増雄(ほか2名) 篇 図 1−1〜1−n:壜テ身x/7面 2.6,10:   トラック 3.4,5:  り(戸4−t=−クタ7.8,9:代
替也V 〜21−n:菊デ歌り面 22: 25.28 26.27 Lラック 子穿替づ斤ダイ負域 :イ代ン名クセ、2り :久閤仁クタ
FIG. 1 is an explanatory diagram for explaining the alternative processing method according to the present invention, and FIG. 2 a5 and FIG. 3 are explanatory diagrams for explaining the conventional alternative processing method. 1-1 to 1-n, 21-1 to 21-n...Magnetic disk surface, 2.6.10...Track, 3,4.5...
Defective sector, 7.8.9...Alternative sector, 23...
Alternate cylinder area. Agent Masuo Daikun (and 2 others) Figures 1-1 to 1-n: Bottle body x/7th side 2.6, 10: Tracks 3.4, 5: Ri (door 4-t = -kuta 7) .8, 9: Alternative V ~21-n: Kikude singing side 22: 25.28 26.27 L rack child replacement Zu 斤 die negative range: I substitute name habit, 2: Kujo Jinkuta

Claims (1)

【特許請求の範囲】 読み書き不能となつた磁気ディスク装置の欠陥ブロック
を他のブロックに代替えさせる磁気ディスク制御装置の
欠陥ブロック代替処理方式において、 上記欠陥ブロック代替えするブロックを該欠陥ブロック
と同一シリンダ内の他のブロックに選定し、この選定し
たブロックに上記欠陥ブロックを代替えさせることを特
徴とする磁気ディスク制御装置の欠陥ブロック代替処理
方式。
[Claims] In a defective block replacement processing method of a magnetic disk control device that replaces a defective block of a magnetic disk device that cannot be read or written with another block, the block to be replaced with the defective block is located in the same cylinder as the defective block. 1. A defective block replacement processing method for a magnetic disk control device, characterized in that the defective block is replaced by another block in the magnetic disk control device.
JP25627888A 1988-10-12 1988-10-12 Defective block substitution processing system for magnetic disk controller Pending JPH02103781A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25627888A JPH02103781A (en) 1988-10-12 1988-10-12 Defective block substitution processing system for magnetic disk controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25627888A JPH02103781A (en) 1988-10-12 1988-10-12 Defective block substitution processing system for magnetic disk controller

Publications (1)

Publication Number Publication Date
JPH02103781A true JPH02103781A (en) 1990-04-16

Family

ID=17290428

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25627888A Pending JPH02103781A (en) 1988-10-12 1988-10-12 Defective block substitution processing system for magnetic disk controller

Country Status (1)

Country Link
JP (1) JPH02103781A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6125427A (en) * 1989-12-19 2000-09-26 Hitachi, Ltd. Magnetic disc control apparatus with parallel data transfer between disc control unit and encoder circuit
KR100413018B1 (en) * 2000-01-06 2003-12-31 인터내셔널 비지네스 머신즈 코포레이션 Method for assigning alternative sector, method for reading data, disk drive apparatus, and apparatus for writing/reading av data

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6125427A (en) * 1989-12-19 2000-09-26 Hitachi, Ltd. Magnetic disc control apparatus with parallel data transfer between disc control unit and encoder circuit
US6311236B1 (en) 1989-12-19 2001-10-30 Hitachi, Ltd. Magnetic disc control apparatus with parallel data transfer between disc control unit and encoder circuit
US6578136B2 (en) 1989-12-19 2003-06-10 Hitachi, Ltd. Magnetic disc control apparatus with parallel data transfer between disc control unit and encoder circuit
KR100413018B1 (en) * 2000-01-06 2003-12-31 인터내셔널 비지네스 머신즈 코포레이션 Method for assigning alternative sector, method for reading data, disk drive apparatus, and apparatus for writing/reading av data

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