JPS645392B2 - - Google Patents
Info
- Publication number
- JPS645392B2 JPS645392B2 JP8206281A JP8206281A JPS645392B2 JP S645392 B2 JPS645392 B2 JP S645392B2 JP 8206281 A JP8206281 A JP 8206281A JP 8206281 A JP8206281 A JP 8206281A JP S645392 B2 JPS645392 B2 JP S645392B2
- Authority
- JP
- Japan
- Prior art keywords
- sector
- replacement
- storage area
- sectors
- address
- 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
Links
- 230000002950 deficient Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 5
- 238000012790 confirmation Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1883—Methods for assignment of alternate areas for defective areas
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B2020/10916—Seeking data on the record carrier for preparing an access to a specific address
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Description
【発明の詳細な説明】
本発明はセクタ単位でデータを記録する磁気デ
イスク装置に係り、データを記録したセクタが不
良となつた場合、このセクタの代わりに割り当て
るために予め用意された交代トラツク上の交代セ
クタをトラツク上のセクタの連続方向に１セクタ
おき、または数セクタ毎に使用することとした磁
気デイスク装置の交代セクタアドレス確認方法に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic disk device that records data in sector units, and when a sector in which data is recorded becomes defective, a replacement track is allocated in place of the sector. The present invention relates to a method for confirming alternate sector addresses in a magnetic disk device, in which alternate sectors are used every other sector or every few sectors in the direction of consecutive sectors on a track.
磁気デイスク装置を動作させるためにはコマン
ドを発するプロセツサと該プロセツサのコマンド
により磁気デイスク装置を制御する磁気デイスク
制御装置を有している。 In order to operate a magnetic disk device, a processor that issues commands and a magnetic disk control device that controls the magnetic disk device based on the commands from the processor are required.
また、プロセツサは多種類の仕事をしているの
で、磁気デイスク装置の動作としてはなるべく下
位の装置で処理を可能とするのが望ましい。 Furthermore, since the processor performs many different tasks, it is desirable that the operations of the magnetic disk device be performed by a lower-level device as much as possible.
従来の磁気デイスク装置においては、セクタ単
位に分割された複数のトラツクからなる通常の記
録再成を行う第１の記憶域と、第１の記憶域と同
様にセクタ単位に分割された複数のトラツクから
なる第１の記憶域において使用不能な不良セクタ
が発生した場合に、当該不良セクタの代わりにそ
の領域を割り当てるための第２の記憶域が設けら
れている。 In a conventional magnetic disk device, there is a first storage area that performs normal recording and regeneration, which is made up of a plurality of tracks divided into sectors, and a plurality of tracks, which are divided into sectors like the first storage area. A second storage area is provided for allocating an area in place of an unusable bad sector when an unusable bad sector occurs in the first storage area.
このような磁気デイスク装置においては、この
第１の記憶域において不良セクタが発生した場合
には、この保良セクタの代わりに第２の記憶域に
交代セクタを割り当て使用される。そして、第１
の記憶域の使用不能セクタには、不良であること
を示すフラグと、第２の記憶域の交代セクタのア
ドレスを記憶し、第２の記憶域の交代セクタに
は、交代セクタであることを示すフラグと、第１
の記憶域の使用不能セクタのアドレスを本来の交
代セクタのアドレス代えて記憶する。 In such a magnetic disk device, when a bad sector occurs in the first storage area, a replacement sector is allocated and used in the second storage area in place of the defective sector. And the first
In the unusable sector of the storage area, a flag indicating that it is defective and the address of a replacement sector in the second storage area are stored, and in the replacement sector of the second storage area, a flag indicating that it is a replacement sector is stored. flag indicating and the first
The address of the unusable sector in the storage area is stored instead of the address of the original replacement sector.
このような従来の磁気デイスク装置において
は、交代トラツク上のセクタを全部交代セクタと
して使用して良いこととなつている。従つて交代
トラツク上のセクタを全部交代セクタとして使用
した場合には、本来の交代トラツクのアドレスを
持つたセクタは存在しなくなる。故に交代セクタ
に磁気ヘツドをシークする場合、交代トラツク上
の交代セクタが全て交代域として使用されていれ
ば、交代セクタそのもののアドレスが記憶されて
いるセクタが存在しないため、交代セクタのアド
レスを読んでも確認することが出来ない事になる
のでこの確認動作をするようになつていない。 In such conventional magnetic disk devices, all sectors on the alternate track can be used as alternate sectors. Therefore, if all the sectors on the replacement track are used as replacement sectors, there will be no sector that has the original address of the replacement track. Therefore, when seeking a magnetic head to a replacement sector, if all replacement sectors on the replacement track are used as replacement areas, there is no sector in which the address of the replacement sector itself is stored, so it is necessary to read the address of the replacement sector. However, since it would not be possible to confirm, this confirmation operation has not been performed.
従つて不良セクタをアクセスして不良交代がな
されていることが判明し、これに対する交代トラ
ツク上の不良セクタに対応する交代セクタにシー
クしようとした時、誤つてその交代セクタの存在
する交代トラツクとは異なる交代トラツクにシー
クした場合には、当然指定交代セクタがなく若し
交代セクタとして使用していないセクタがあつて
もそのセクタのアドレスを読んで確認動作をしな
いので指定された交代セクタが無いとの報告を磁
気デイスク制御装置を経てプロセツサに報告する
こととなる。 Therefore, when it is discovered that a bad sector has been replaced by accessing a bad sector, and an attempt is made to seek to the replacement sector corresponding to the bad sector on the replacement track, the replacement track where the replacement sector is located is mistakenly identified. When seeking to a different alternate track, naturally there is no designated alternate sector, and even if there is a sector that is not used as a alternate sector, the address of that sector is not read and confirmed, so there is no designated alternate sector. The information will be reported to the processor via the magnetic disk controller.
従つて、プロセツサはこの報告により磁気デイ
スク制御装置に命令し、再度別の交代セクタを指
定しこのセクタをシークさせるか、シークのやり
直しをさせるので時間がかかると共にプロセツサ
に負荷がかかる欠点があつた。 Therefore, the processor uses this report to instruct the magnetic disk controller to specify another alternate sector again and seek this sector, or to redo the seek, which has the disadvantage of taking time and placing a load on the processor. .
また、前記第１の記憶域の不良セクタのために
割に当てた前記第２の記憶域の第１の交代セクタ
が、また不良となつた場合は第２の記憶域の第１
の交代セクタとは異なる位置にある第２の交代セ
クタを指定し、この第２の交代セクタに交代セク
タであるフラグを記録するとともに、該１の記憶
域の不良セクタのアドレスを記憶し、また第１の
記憶域の不良セクタには第２の交代セクタのアド
レスを再記憶する。しかし、この場合第１の交代
セクタは表示を変更しないので、不良セクタをア
クセスした場合誤つて第１の交代セクタをシーク
するとそのままこのセクタを読み込んだり、又こ
のセクタに書き込んだりする。このため読み込む
時はチエツクをするのでこのセクタが不良である
ことが判り、再度この交代セクタを指定すること
になり、時間がかかると共にプロセツサにも負荷
がかかる欠点があり、書き込む時はチエツクしな
いのでそのまま書き込む。従つて誤まつた場所に
書き込むので後の処理が出来なくなる欠点があ
る。又、所定の不良交代トラツクをシークした場
合でも所定の交代セクタを探すのはインデツクス
信号を基準としてレコード番号を逐次おつてゆき
探すので時間がかかる欠点があつた。 Further, if the first replacement sector of the second storage area allocated for the bad sector of the first storage area becomes defective again, the first replacement sector of the second storage area
designates a second replacement sector located at a different position from the replacement sector of the second replacement sector, records a flag indicating that it is a replacement sector in this second replacement sector, and stores the address of the defective sector in the first storage area; The address of the second replacement sector is stored again in the defective sector of the first storage area. However, in this case, the display of the first replacement sector does not change, so if a defective sector is accessed and the first replacement sector is sought by mistake, this sector is read or written as is. For this reason, when reading, a check is performed, and if this sector is found to be defective, the replacement sector must be specified again, which has the disadvantage of taking time and putting a load on the processor.However, when writing, it is not checked. Write it as is. Therefore, since the data is written in the wrong location, there is a drawback that subsequent processing cannot be performed. Furthermore, even when a predetermined defective replacement track is sought, the search for a predetermined replacement sector involves sequentially passing record numbers based on the index signal, which takes time.
本発明の目的は上記の欠点を無くするために、
不良交代トラツク上の交代セクタをセクタの連続
方向に１セクタおき又は数セクタ毎に使用するこ
ととし、交代セクタとして使用しないセクタを確
保し、かつ交代セクタ以外のセクタのアドレスを
読み込み確認するようにすることにより、所定の
不良交代トラツクか否か又シークしたセクタのレ
コード番号が判るので、正常の場合でも又誤つて
別の不良交代トラツクをシークした場合でも、プ
ロセツサをわずらわすことなく磁気デイスク制御
装置で対応出来、尚迅速に交代セクタをシーク出
来る磁気デイスク装置の交代セクタアドレス確認
方法の提供にある。 The purpose of the present invention is to eliminate the above-mentioned drawbacks.
The replacement sectors on the defective replacement track are used every other sector or every few sectors in the continuous direction of sectors, sectors that are not used as replacement sectors are secured, and addresses of sectors other than the replacement sectors are read and confirmed. By doing this, you can find out whether it is a specified bad replacement track or not and the record number of the sought sector, so even if it is normal or if you accidentally seek another bad replacement track, you can read the magnetic disk without bothering the processor. To provide a method for confirming an alternate sector address of a magnetic disk device, which can be handled by a control device and can quickly seek the alternate sector.
本発明は上記の目的を達成するために、セクタ
単位に分割された複数のトラツクにより構成され
た第１の記憶域と第２の記憶域を持ち、第１の記
憶域のあるセクタが使用不能となつた場合、該第
２の記憶域のセクタを交代セクタとして使用する
構成とし、該第１の記憶域の使用不能セクタに
は、不良であることを示すフラグと、第２の記憶
域の交代セクタのアドレスを記憶し、また第２の
記憶域の交代セクタには交代セクタであることを
示すフラグと、第１の記憶域の使用不能セクタの
アドレスを記憶するようにした磁気デイスク装置
において、
前記第２の記憶域の交代セクタの使用をトラツ
ク上のセクタの連続方向に１セクタおきまたは数
セクタ毎に使用するようにし、該第１の記憶域の
使用不能セクタのアクセスにより第２の記憶域の
交代セクタを検出し処理する場合、該第２の記憶
域のトラツク上の交代セクタとして使用しないセ
クタのアドレスにより該交代セクタのアドレスを
確認可能としたことを特徴とする磁気デイスク装
置の交代セクタアドレス確認方法である。 In order to achieve the above object, the present invention has a first storage area and a second storage area configured by a plurality of tracks divided into sectors, and a certain sector of the first storage area is unavailable. In this case, the sector in the second storage area is used as a replacement sector, and the unusable sector in the first storage area is marked with a flag indicating that it is defective, and a flag in the second storage area is placed in the unusable sector. In a magnetic disk device in which an address of a replacement sector is stored, and a flag indicating that the sector is a replacement sector is stored in the replacement sector of a second storage area, and an address of an unusable sector of a first storage area is stored. , the alternate sectors of the second storage area are used every other sector or every few sectors in the direction of continuous sectors on the track, and the second storage area is accessed by accessing the unusable sectors of the first storage area. A magnetic disk device characterized in that, when detecting and processing a replacement sector in a storage area, the address of the replacement sector can be confirmed by the address of a sector that is not used as a replacement sector on a track of the second storage area. This is a replacement sector address confirmation method.
以下、本発明の一実施例につき図に従つて説明
する。第１図は磁気デイスクの多数のトラツクを
説明する図で、１は第１の記憶域、２は不良交代
トラツク領域（第２の記憶領域）を示す。第２図
は本発明の実施例の一本の交代トラツク上の交代
セクタの使用状況を示し、５は一本の交代トラツ
ク、３，３′，３″，３は交代セクタ、４，４′，
４″，４は交代セクタとして使用しないセクタ
を示す。第３図は１セクタ中に書き込まれる情報
を示し、６はフラグビツト領域（以下Ｆと称す）、
７はシリンダアドレス領域（以下CCと称す）、８
はヘツドアドレス領域（以下HHと称す）、９は
レコード番号領域（以下Ｒと称す）、１０はデー
タ領域（以下DATAと称す）である。今、第１
の記憶領域１内のｍ番目のトラツクのｎ番目のセ
クタを読むために該アドレスをアクセスした場
合、このセクタには第３図に示す情報が書かれて
いる。今、Ｆ６をこのセクタが正常であれば
“0000”とし、不良であれば“1000”とし、尚不
良交代トラツクの交代セクタが使用された場合交
代セクタのＦ６は“0100”と表わすものとする。
従つてこのセクタのＦ６が“0000”ならばそれに
続くCC７、HH８、Ｒ９は正常であるので、後
に続くDATA１０をリードするか、ここにライ
トして処理は終了する。ところがＦ６が“1000”
ならばこのセクタは不良であるのでそれに続く
CC７、HH８、Ｒ９には交代トラツク領域２の、
例えば交代トラツク５の交代セクタ３のアドレス
が記録されている。従つて交代セクタ３のアドレ
スへ再度アクセスする。交代セクタ３の第３図に
示す情報のＦ６には“0100”が記録されており、
これに続くCC７、HH８、Ｒ９には第１記憶領
域１内のｍ番目のトラツクのｎ番目のセクタのア
ドレスが記録されていて交代セクタ３がどのセク
タの交代セクタか判断出来るようになつている。
ここで本発明の場合は第２図に示す如く交代セク
タ３，３′，３″，３のとり方を１セクタおきか
又は数セクタおきにしている。従つて交代セクタ
として使用しないセクタ４，４′，４″，４（Ｆ
６は“0000”）が１トラツク上に一定間隔で保存
されている。又本発明の場合は交代セクタ３，
３′，３″，３以外のセクタ４，４′，４″，４
のアドレスも読み確認するようになつているの
で、交代セクタ３，３′，３″，３のアドレスに
は記録されていない本来のCC７、HH８、Ｒ９
が判り、再アクセスした交代セクタ３のアドレス
の正確さを迅速に確認することが出来、又セクタ
４，４′，４″，４のレコード番号によりインデ
ツクス信号を基準にしなくてもすぐ交代セクタ３
をシーク出来る。又、間違つて交代トラツク５以
外のトラツクをシークした場合では、交代トラツ
クとして使用しないセクタ（第２図の４，４′，
４″，４に相当）が本発明の場合は必ず１セク
タおき又は数セクタ毎にあるので、このアドレス
にて間違つたトラツクをシークしたことが確認出
来、磁気デイスク制御装置はプロセツサの指令を
受ける迄もなく間違つたトラツクのアドレスを基
準にして不良交代トラツク５の交代セクタを迅速
にシーク出来る。 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating a large number of tracks on a magnetic disk, where 1 indicates a first storage area and 2 indicates a defective replacement track area (second storage area). FIG. 2 shows the usage status of alternate sectors on one alternate track in the embodiment of the present invention, where 5 is one alternate track, 3, 3', 3'', 3 is alternate sector, 4, 4' ，
4", 4 indicates a sector that is not used as a replacement sector. FIG. 3 shows information written in one sector, and 6 indicates a flag bit area (hereinafter referred to as F);
7 is a cylinder address area (hereinafter referred to as CC), 8
9 is a head address area (hereinafter referred to as HH), 9 is a record number area (hereinafter referred to as R), and 10 is a data area (hereinafter referred to as DATA). Now, the first
When the address is accessed to read the nth sector of the mth track in the storage area 1 of , the information shown in FIG. 3 is written in this sector. Now, let F6 be expressed as "0000" if this sector is normal, "1000" if it is bad, and if a replacement sector of a bad replacement track is used, F6 of the replacement sector will be represented as "0100". .
Therefore, if F6 of this sector is "0000", the following CC7, HH8, and R9 are normal, so the following DATA10 is read or written here, and the process ends. However, F6 is “1000”
If so, this sector is bad, so follow it.
CC7, HH8, R9 have alternate track area 2,
For example, the address of the replacement sector 3 of the replacement track 5 is recorded. Therefore, the address of alternate sector 3 is accessed again. “0100” is recorded in F6 of the information shown in FIG. 3 of replacement sector 3,
The address of the n-th sector of the m-th track in the first storage area 1 is recorded in the following CC7, HH8, and R9, so that it can be determined which sector the replacement sector 3 is the replacement sector for. .
In the case of the present invention, as shown in FIG. 2, the alternate sectors 3, 3', 3'', 3 are arranged every other sector or every few sectors.Therefore, sectors 4, 4 which are not used as alternate sectors ',4'',4(F
6 is "0000") are stored at regular intervals on one track. In addition, in the case of the present invention, alternate sector 3,
Sectors other than 3', 3'', 3 4, 4', 4'', 4
Since the addresses of the sectors 3, 3', 3'', and 3 are read and confirmed, the original CC7, HH8, and R9 addresses that are not recorded in the alternate sectors 3, 3', 3'', and 3 are also read and confirmed.
It is possible to quickly check the accuracy of the address of the re-accessed replacement sector 3, and the record numbers of sectors 4, 4', 4'', 4 can be used to immediately check the address of the replacement sector 3 without using the index signal as a reference.
You can seek. In addition, if you mistakenly seek a track other than the replacement track 5, the sectors that are not used as the replacement track (4, 4', and
4'', 4) is always present every other sector or every few sectors in the case of the present invention, so it can be confirmed that the wrong track was sought at this address, and the magnetic disk control device does not follow the instructions from the processor. The replacement sector of the defective replacement track 5 can be quickly sought based on the address of the track that was inevitably wrong.
以上、詳細に説明した如く本発明によれば、プ
ロセツサに負荷をかけることなく迅速に所定の交
代セクタをシーク出来ると共に、正確な位置付け
の保証が出来る効果がある。 As described in detail above, according to the present invention, it is possible to quickly seek a predetermined replacement sector without imposing a load on the processor, and it is possible to guarantee accurate positioning.
第１図は磁気デイスクの多数のトラツクを示す
図で、１は第１の記憶領域、２は不良交代トラツ
ク領域（第２の記憶領域）を示す。第２図は本発
明の実施例の一本の交代トラツク上の交代セクタ
の使用状況を示し、５は一本の交代トラツク、
３，３′，３″，３は交代セクタ、４，４′，
４″，４は交代セクタとして使用しないセクタ
を示す。第３図は１セクタ中に書き込まれる情報
を示し、６はフラグビツト領域、７はシリンダア
ドレス領域、８はヘツドアドレス領域、９はレコ
ード番号領域、１０はデータ領域である。
FIG. 1 is a diagram showing a large number of tracks on a magnetic disk, where 1 indicates a first storage area and 2 indicates a defective replacement track area (second storage area). FIG. 2 shows the usage status of a replacement sector on one replacement track according to an embodiment of the present invention, and 5 indicates one replacement track;
3, 3', 3'', 3 are alternate sectors, 4, 4',
4'', 4 indicates a sector that is not used as a replacement sector. Figure 3 shows the information written in one sector, 6 is a flag bit area, 7 is a cylinder address area, 8 is a head address area, and 9 is a record number area. , 10 is a data area.
Claims (1)
り構成された第１の記憶域と第２の記憶域を持
ち、 第１の記憶域のあるセクタが使用不能となつた
場合、該第２の記憶域のセクタを交代セクタとし
て使用する構成とし、 該第１の記憶域の使用不能セクタには、不良で
あることを示すフラグと、第２の記憶域の交代セ
クタのアドレスを記憶し、 また第２の記憶域の交代セクタには、交代セク
タであることを示すフラグと、第１の記憶域の使
用不能セクタのアドレスを記憶するようにした磁
気デイスク装置において、 前記第２の記憶域の交代セクタの使用をトラツ
ク上のセクタの連続方向に１セクタおきまたは数
セクタ毎に使用するようにし、 該第１の記憶域の使用不能セクタのアクセスに
より第２の記憶域の交代セクタを検出し処理する
場合、 該第２の記憶域のトラツク上の交代セクタとし
て使用しないセクタのアドレスにより該交代セク
タのアドレスを確認可能としたことを特徴とする
磁気デイスク装置の交代セクタアドレス確認方
法。[Claims] A first storage area and a second storage area configured by a plurality of tracks divided into sectors, and when a sector in the first storage area becomes unusable, A sector of the second storage area is configured to be used as a replacement sector, and an unusable sector of the first storage area is provided with a flag indicating that it is defective and an address of the replacement sector of the second storage area. In the magnetic disk device, a flag indicating that the sector is a replacement sector and an address of an unusable sector in the first storage area are stored in the replacement sector of the second storage area. The alternate sectors of the storage area are used every other sector or every few sectors in the direction of consecutive sectors on the track, and the second storage area is alternated by accessing the unusable sector of the first storage area. Alternate sector address confirmation for a magnetic disk device, characterized in that when detecting and processing a sector, the address of the alternate sector can be confirmed by the address of a sector that is not used as an alternate sector on a track of the second storage area. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8206281A JPS57198587A (en) | 1981-05-29 | 1981-05-29 | Confirming system for substitutional sector address of magnetic disc device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8206281A JPS57198587A (en) | 1981-05-29 | 1981-05-29 | Confirming system for substitutional sector address of magnetic disc device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57198587A JPS57198587A (en) | 1982-12-06 |
| JPS645392B2 true JPS645392B2 (en) | 1989-01-30 |
Family
ID=13764013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8206281A Granted JPS57198587A (en) | 1981-05-29 | 1981-05-29 | Confirming system for substitutional sector address of magnetic disc device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57198587A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6074158A (en) * | 1983-09-28 | 1985-04-26 | Matsushita Electric Ind Co Ltd | Information recording and reproducing device |
| JP2574251B2 (en) * | 1986-08-18 | 1997-01-22 | 松下電送 株式会社 | Alternating recording / reproducing device |
-
1981
- 1981-05-29 JP JP8206281A patent/JPS57198587A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57198587A (en) | 1982-12-06 |
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