WO2000051113A1 - Dispositif de disque magnetique et disque d'informations maitre - Google Patents
Dispositif de disque magnetique et disque d'informations maitre Download PDFInfo
- Publication number
- WO2000051113A1 WO2000051113A1 PCT/JP2000/000955 JP0000955W WO0051113A1 WO 2000051113 A1 WO2000051113 A1 WO 2000051113A1 JP 0000955 W JP0000955 W JP 0000955W WO 0051113 A1 WO0051113 A1 WO 0051113A1
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- WIPO (PCT)
- Prior art keywords
- magnetic disk
- disk
- track
- information
- head
- Prior art date
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 184
- 230000005415 magnetization Effects 0.000 claims description 16
- 230000005294 ferromagnetic effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 239000003302 ferromagnetic material Substances 0.000 claims description 4
- 239000010409 thin film Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 238000005070 sampling Methods 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- NOTIQUSPUUHHEH-UXOVVSIBSA-N dromostanolone propionate Chemical compound C([C@@H]1CC2)C(=O)[C@H](C)C[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H](OC(=O)CC)[C@@]2(C)CC1 NOTIQUSPUUHHEH-UXOVVSIBSA-N 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 101000969688 Homo sapiens Macrophage-expressed gene 1 protein Proteins 0.000 description 1
- 102100021285 Macrophage-expressed gene 1 protein Human genes 0.000 description 1
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- 238000007796 conventional method Methods 0.000 description 1
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- 238000001312 dry etching Methods 0.000 description 1
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- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/86—Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers
- G11B5/865—Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers by contact "printing"
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/08—Track changing or selecting during transducing operation
- G11B21/081—Access to indexed tracks or parts of continuous track
- G11B21/083—Access to indexed tracks or parts of continuous track on discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
- G11B21/106—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following on disks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
- G11B5/82—Disk carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59633—Servo formatting
- G11B5/59655—Sector, sample or burst servo format
Definitions
- the present invention relates to a magnetic disk drive for recording and reproducing information on a magnetic disk capable of recording and reproducing information, and more particularly to a format of a data track on the magnetic disk. Further, the present invention relates to a master information disk provided with data track format information and a magnetic disk device provided with a magnetic disk on which format information is transferred and recorded using the master information disk.
- FIG. 8 is a schematic explanatory view showing an example of a conventional magnetic disk drive.
- the magnetic disk 1 is a medium for recording data.
- the magnetic head 2 is a means for recording and reproducing information on and from the magnetic disk 1.
- the actuator 3 is means for mounting the magnetic head 2 at the tip and performing a positioning operation at an arbitrary radial position on the magnetic disk 1.
- the head amplifier 5 is means for detecting and amplifying the reproduced signal of the magnetic head 2.
- the controller 4 detects the relative position of the magnetic head 2 with respect to the magnetic disk 1 from the output of the head amplifier 5 and outputs a control signal for positioning the actuator 3 at a predetermined position on the magnetic disk 1. It is a step.
- the driver 6 is a means for supplying a current corresponding to the control signal to the actuator 3.
- the actuator 3 includes a carriage 3a, a suspension 3b, a drive coil 3c, a permanent magnet 3d, and the like.
- the carriage 3a is a means that moves around the point c as a rotation center.
- the suspension 3b is mounted on the carriage 3a, and is a means for flying the magnetic head 2 at a distance of several tens of nanometers from the surface of the magnetic disk 1 by a flying mechanism called a slider.
- the drive coil 3c is a means for generating a driving force by a permanent magnet 3d provided opposite to the drive coil 3c, thereby rotating the actuator 3 as a result.
- the permanent magnet 3 d is means for generating a driving force by the driving coil 3 c to rotate the actuator 3.
- a spindle motor for rotating the magnetic disk 1
- an interface for exchanging digital information with the host
- a buffer and buffer control for storing the information and efficiently recording and reproducing data on the magnetic disk 1.
- an information recording / reproducing circuit for storing the information and efficiently recording and reproducing data on the magnetic disk 1.
- Magnetic disk 1 When recording / reproducing the information, the spindle motor (not shown)
- the magnetic head 2 is positioned on the magnetic disk 1 by the actuator 3, but is formed integrally with the pressing force of the suspension 3b provided at the tip of the actuator 3 and the magnetic head 2 not shown.
- the slider is held in a floating state at a position where the acting force of the air flow between the slider and the magnetic disk 1 is balanced.
- position information (b in the figure) is recorded in advance on concentric tracks (one track is indicated by a broken line in a in the figure).
- the position information b is recorded at regular intervals on each track, and the magnetic head 2 reproduces the position information at regular intervals as the magnetic disk 1 rotates (this time is taken as the sampling period and the sampling period).
- the reciprocal of is called the sampling frequency, which is 5.4 kHz in the case of this conventional example.
- the area where the position information b is recorded is called a servo area.
- Information is recorded or reproduced in an area other than the servo area. This area is called a data area.
- the reproduced signal from the magnetic head 2 is input to the controller 4 by being detected and amplified by the head amplifier 5.
- the controller 4 determines the position information based on the input signal, calculates the position error of the magnetic head 2 with respect to the target track a at that time, and drives the actuator 3 so as to reduce the position error. Calculates the amount of control required for output and outputs a control signal. In this case, for example, a control method such as phase compensation is used.
- the driver 6 supplies a necessary current to the drive coil 3c of the actuator 3 based on the input control signal.
- a driving force is generated by the driving coil 3c and the permanent magnet 3d provided opposite thereto, and the actuator rotates around the point c and always magnetizes on the target track a.
- R to position head 2 In this state, information is recorded and reproduced in the data area by the magnetic head 2.
- a closed loop positioning control system for positioning the magnetic head 2 on the target track when recording and reproducing information is employed.
- FIG. 9 shows the details of the position information formed in the servo area 7a.
- track identification information In the servo area 7a, track identification information, a burst pattern, and the like are recorded as servo information for positioning the head 14 having the write head 15 and the read head 16.
- the track identification information is information indicating the track number of each data area, and is read by the magnetic head 2 so that the track position where the magnetic head 2 is currently located can be determined.
- the burst pattern is composed of a plurality of patterns (four in the case of this conventional example) having different phases. By controlling the actuator 3 in 4, the magnetic head 2 always follows and positions on a predetermined track. More specifically, AGC 9 is an area for making the amplitude of the reproduced waveform constant by the AGC circuit, and Sync 1 ⁇ is an area for clock synchronization.
- SAM Servo Address Mark 11 1 indicates the start position of the servo area.
- Trac k No. Wedge No. 12 is a track number called a gray code and a ⁇ edge number.
- the burst 13 is a burst area for generating a position signal in a track.
- Track No. Wedge No. 12 is the track identification information, and burst 13 corresponds to the burst pattern.
- SAM Servo Ad dress Mark
- the head detects Trac No. Wedge No. 12 based on the point in time and detects the track number. After that, a burst signal is detected in burst 13 from a reference time to a predetermined time, and based on the signal, the head is positioned based on a closed-loop positioning control system.
- FIG. 10 illustrates an example of a two-phase servo in which a position signal in a track is generated, and a reference signal for positioning the head 14 is generated based on the signal.
- servo areas 7a and data areas 7b are alternately arranged.
- the case where the head 14 records and reproduces the n + 1st track of the support area 7a will be described.
- Reference numeral 17 denotes a burst signal detected for the first time, and the vertical axis indicates a position in the radial direction from the rotation center of the head 14.
- the shape of the inverted signal is the amplitude of the detected signal.
- 18, 19, and 20 also represent the detected amplitude of the burst signal at the position of head 14.
- the burst signal is thus composed of four signals, A, B, C, and D.
- 21 is the difference between the signal detected at 17 and the signal detected at 18, and is called N-phase.
- 22 is the difference between the amplitude of the 19 detection signals and the amplitude of the 20 detection signals, and is called the Q phase.
- AGC servo information
- the present invention has a problem that when data that is transferred continuously over time is recorded and reproduced, the transfer efficiency of the data is reduced or a part of the data is lost, and it takes time to preformat a magnetic disk. Considering the problem of high cost, magnetic data can efficiently record and reproduce data that is transferred continuously over time, and can preformat magnetic disks in a short time and without cost. It is intended to provide a disk device and a master information disk.
- a first aspect of the present invention is a head for recording and reproducing data while moving relatively to a magnetic disk rotating at a predetermined rotation speed.
- An actuator for positioning the head relative to the disk, and detecting the position of the head by a servo sector having positioning information magnetically recorded on the magnetic disk;
- a controller for controlling the actuator to be positioned based on the detection signal, wherein the magnetic disk has at least a portion in which the arrangement of the track having the servo sector is helical, A ferromagnetic thin film or a ferromagnetic powder coating phase is formed on the surface of the disk.
- the at least the surface of the protrusion of the irregularities is ferromagnetic, the concave-convex shape is formed in a spiral shape, the surface of the master information disk, the magnetic
- the magnetic disk device is characterized in that a magnetic pattern corresponding to the irregular shape is recorded by bringing the magnetic pattern into contact with the surface of a magnetic disk.
- the magnetic disk includes a region in which the track is formed in a spiral shape and a region in which the track is formed in a concentric shape.
- the magnetic disk device according to the first invention According to a third aspect of the present invention (corresponding to claim 3), the track force concentrically formed region is formed on a side close to a rotation center of the magnetic disk, and the track has a spiral shape.
- the area where the track is formed spirally and the area where the track is formed concentrically include at least the servo sector of the area adjacent to each other.
- a fifth aspect of the present invention includes a disk base on which a concavo-convex shape corresponding to positioning information of a servo sector is formed, and at least a convex surface of the concavo-convex shape is magnetized; At least a part of the shape is spirally formed on the disk base, and is used to record a magnetization pattern corresponding to the irregular shape on the magnetic disk by being brought into contact with the surface of the magnetic disk. Master information disc.
- the magnetic disk drive of the present invention includes a rotating magnetic disk and a magnetic disk.
- a head for recording and reproducing information while relatively moving; and an actuator for supporting the head and moving and positioning the head in a substantially radial direction of the magnetic disk in accordance with a command.
- the actuator is for positioning a head in accordance with position information magnetically recorded in a servo sector on a magnetic disk, and the position information is formed spirally on the magnetic disk. This allows the head to record and reproduce while following the spiral track during recording and reproduction, so that large-capacity continuous data such as video and audio can be recorded and reproduced efficiently without track jumps.
- continuous transfer performance is remarkably improved, and frames are not dropped.
- the use of the master information disk of the present invention eliminates the need for highly precise positioning technology and the time required for writing by writing servo sectors with a servo track writer, thereby reducing the cost of manufacturing the magnetic disk device of the present invention. Can be realized.
- FIG. 1 is a schematic diagram showing a configuration of a magnetic disk drive according to a first embodiment of the present invention.
- FIG. 2 is a diagram illustrating a configuration of a servo area according to the first embodiment of the present invention.
- FIG. 3 is a diagram illustrating a magnetic field in which a track according to a second embodiment of the present invention has a spiral zone and a concentric zone. Diagram showing disk
- FIG. 4 is a diagram showing a pattern of a servo area of a master information disk according to the first embodiment of the present invention.
- FIG. 5 is a diagram for explaining a case in which a magnetization pattern of a master information disk is transferred to a magnetic disk according to the first embodiment of the present invention.
- FIG. 6 is a diagram showing a magnetic disk on which a magnetization pattern has been transferred by a master information disk according to the first embodiment of the present invention.
- FIG. 7 is a diagram showing a reproduced waveform of a magnetic disk on which a magnetization pattern has been transferred by a master information disk according to the first embodiment of the present invention.
- FIG. 8 is a diagram showing a schematic configuration of a conventional magnetic disk drive.
- FIG. 9 is a diagram illustrating a magnetization pattern of a servo area of a conventional magnetic disk.
- FIG. 10 is a diagram illustrating a two-phase servo signal of a conventional magnetic disk.
- FIG. 11 is a diagram showing that the recording / reproducing ability of the magnetic disk device is reduced due to seek and settling in the first embodiment of the present invention.
- FIG. 1 a first embodiment will be described with reference to FIGS. 1, 2, 4 to 7, and 11.
- FIG. 1 a first embodiment will be described with reference to FIGS. 1, 2, 4 to 7, and 11.
- FIG. 1 is a schematic diagram showing a magnetic disk drive of the first embodiment.
- a magnetic disk 26 is a medium for recording data, and has a spiral track for recording and reproducing video and audio data.
- the magnetic head 2 is a means for recording and reproducing information on and from the magnetic disk 26.
- the actuator 3 is means for mounting the magnetic head 2 at the tip and performing a positioning operation at an arbitrary radial position on the magnetic disk 26.
- the head amplifier 5 is means for detecting and amplifying a reproduction signal of the magnetic head 2.
- the controller 4 detects the relative position of the magnetic head 2 with respect to the magnetic disk 26 from the output of the head amplifier 5, and positions the actuator 3 at a predetermined position on the magnetic disk 26.
- the driver 6 is a means for supplying a current corresponding to the control signal to the actuator 3.
- the actuator 3 includes a carriage 3a, a suspension 3b, a drive coil 3c, a permanent magnet 3d, and the like.
- the carriage 3a is means for swinging about the point c as a center of rotation.
- the suspension 3b is mounted on the carriage 3a, and is a means for floating the magnetic head 2 at a distance of several tens of nanometers from the surface of the magnetic disk 26 by a floating mechanism called a slider.
- the driving coil 3c is a means for generating a driving force by a permanent magnet 3d provided opposite to the driving coil 3c, thereby rotating the actuator 3.
- the permanent magnet 3 d is means for generating driving force by the driving coil 3 c and rotating the actuator 3.
- a spindle motor for rotating the magnetic disk 26, an interface for exchanging digital information with the host, and a buffer for storing the information and efficiently recording and reproducing data on the magnetic disk 26.
- a buffer control unit and an information recording / reproducing circuit are also shown.
- the magnetic disk 26 is configured such that the tracks having the servo area and the data area are arranged spirally.
- the track of the conventional magnetic disk is arranged concentrically like the magnetic disk 1 of FIG.
- the head 14b Move in as short a time as possible.
- settling 24 is performed to set the swing to the center of the target track (the position of the head 14b).
- the heads 14b are precisely positioned.
- recording or reproduction of data is performed. It is necessary to control the head 14b so that it is correctly positioned on the target track even during data recording and reproduction.
- the rotating disk generates various vibrations, and the head 14b also vibrates, so that a following operation that follows the track is required.
- the positioning operation of the head 14b is roughly divided into three modes: seek, settling, and following.
- high-definition programs such as high-definition programs require a large amount of data to be transferred to obtain clear and detailed image quality.
- the magnetic head 2 cannot perform recording and reproduction while performing the operations of the seek 23 and the settling 24 shown in Fig. 11. Therefore, continuous playback performance cannot be guaranteed during playback of AV data, or video and audio are partially stopped (dropped frames) or transfer efficiency is reduced. Stated.
- the tracks of the magnetic disk 26 of FIG. 1 are arranged so as to be spiral.
- AV data is data that is continuously transmitted in time during recording, and is data that is continuously reproduced in time during reproduction. Record this AV data W
- AV data When recording or reproducing, AV data can be recorded or reproduced continuously on the spiral track of the magnetic disk 26.
- the magnetic disk 26 uses a continuous track when recording or reproducing AV data, the seek 23 and settling 24 shown in FIG. 11 are not required. Therefore, the performance is improved by 30% or more as compared with the magnetic disk device described in the related art, and it is particularly effective for data that is transferred continuously in time such as AV data.
- the magnetic disk 26 formed a spiral counterclockwise so that the carriage 3a could match the rotation of the disk 26, but the carriage 3a was arranged on the left side instead of the right side as shown in FIG. If so, a spiral may be formed clockwise so as to ensure consistency with the rotation of the magnetic disk 26.
- the magnetic disk 26 having such a spiral track is rotated at a constant rotation speed (5,400 rotations per minute in the case of the present embodiment) by a spindle motor (not shown). Being driven.
- the magnetic head 2 is positioned on the magnetic disk 26 by the actuator 3, but it is integrated with the pressing force of the suspension 3b provided at the tip of the actuator 3 and the magnetic head 2 not shown.
- the slider is held in a floating state at a position where the acting force of the air flow between the slider and the magnetic disk 26 formed on the disk is balanced.
- position information (b in the figure) is recorded in advance on each spiral track.
- the position information b is recorded at regular intervals on each track.
- FIG. 2 shows a track 4 of a magnetic disk 26 in which tracks are spirally arranged, and a servo area 5 and a data area 6 constituting a track.
- the magnetic head 2 has position information at regular intervals as the magnetic disk 26 rotates. (This time is called a sampling period, and the reciprocal of the sampling period is called a sampling frequency, and in the case of the present embodiment, it is 5.4 kHz as in the conventional technique).
- the reproduced signal of the magnetic head 2 is detected and amplified by the head amplifier 5 and input to the controller 4.
- the controller 4 determines that the position information is based on the input signal, calculates the position error of the magnetic head 2 with respect to the target track a at that time, and reduces the position error by reducing the position error.
- the control amount required to drive 3 is calculated and a control signal is output. In this case, for example, a control method such as phase compensation is used.
- the driver 6 supplies a necessary current to the drive coil 3c of the actuator 3 based on the input control signal.
- a driving force is generated by the drive coil 3c and the permanent magnet 3d provided opposite thereto, and the actuator rotates around the point c and always has the magnetic head 2 on the target track a.
- Position In this state, information is recorded / reproduced in the data area by the magnetic head 2.
- a closed loop positioning control system for positioning the magnetic head 2 on the target track when recording and reproducing information is employed.
- Track 4 is composed of servo area 5 and data area 6, as shown in Fig. 2.How to position heads 14 in servo area 5 is the same as that described in the prior art. Therefore, the description is omitted.
- AV data can be recorded and reproduced efficiently by arranging the tracks of the magnetic disk in a spiral shape.
- Writing the positioning information to the servo area of the magnetic disk is usually performed using a servo track writer. It takes 10 minutes to several hours. Further, as described in the present embodiment.
- the configuration and the operation in the case where the positioning information is written by magnetic transfer to the servo area using the master information disk for pre-formatting the magnetic disk in which the tracks are spirally arranged will be described.
- FIG. 4 is a diagram showing a pattern of a master information disk 36 arranged in a spiral.
- the master information disk 36 has a servo area 36a, and the servo area 36a includes a tracking servo area 36b and an address information area 36c. Further, on both sides of the servo area 36, there are a data area 36d and a data area 36e.
- FIG. 5 is a diagram showing a case where the magnetization pattern of the master-one information disk is transferred to the magnetic disk.
- the master information disk 36 is arranged close to the magnetic disk 27. As a result, the magnetization pattern of the master information disk 36 is transferred to the magnetic disk 27.
- the master information disk 36 has a convex portion 39 and a concave portion 40.
- the protrusion 39 is magnetized by the magnetization 37 of the protrusion ferromagnetic material. Because the surface of the master information disk 36 changes in magnetoresistance due to the uneven shape, the convex ferromagnetic material
- the recording magnetic field 35 is generated by the magnetization 37 of the material. Since the recording magnetic field 35 has opposite polarities on the surface of the projection 39 and the surface of the depression 40, the magnetic disk 27 has a recording magnetization 38 corresponding to the uneven shape shown in FIG. The pattern will be recorded.
- FIG. 6 shows a state in which the recording magnetic field 35 is transferred to the magnetic disk 27 and the magnetic disk is magnetized in a predetermined magnetization pattern.
- the recording magnetization 38 is magnetized with a polarity opposite to that of the convex portions 39 and the concave portions 40.
- FIG. 7 shows a reproduced waveform when the magnetic disk 27 on which the magnetic pattern is transferred is reproduced by the master information disk 36. This is basically the same as a conventional magnetic disk preformatted by a servo track writer. Next, a method for creating fine irregularities provided on the surface of the master information disk 36 will be described.
- Such a fine concavo-convex pattern can be easily formed by using various fine processing techniques used in a forming process of a master stamper for molding an optical disc and a semiconductor process.
- a resist film is exposed and developed, and then a fine uneven pattern may be formed by dry etching.
- fine processing can be performed directly using a laser beam, an electron beam, or an ion beam without using a resist film.
- the master information disk 36 can be manufactured.
- the track has a spiral shape.
- a master information disk 36 having a simple uneven pattern can be easily manufactured, and by transferring the master information disk 36 to the magnetic disk 27, a magnetic disk 27 having spiral tracks can be manufactured.
- Fig. 3 shows an example of a magnetic disk that divides the magnetic disk 28 into two zones and can efficiently record both the recording and playback of AV data and the access of data that is not transferred continuously over time, such as a computer. It is.
- the magnetic disk 28 is divided into two zones. Tracks are formed spirally on the side (outer peripheral side) far from the rotation center of the magnetic disk 28, and concentrically on the side (inner peripheral side) near the rotation center. There is a spiral track 30 in the outer zone, and the track 30 has a servo area 29 and a data area 31.
- the inner zone has a concentric track 34, and the track 30 has a servo area 33 and a data area 32.
- the zone on the outer circumference side and the zone on the inner circumference side avoid interference between the servo area (particularly burst pattern) of the spiral track and the servo area (particularly burst pattern) of the concentric track.
- the interval may be such that there is no interference between the servo areas.
- the last servo area on the innermost side of the spiral track on the outer side and the concentric circle on the inner side are used.
- the track is configured so that the distance from the servo area is one track.
- the zone on the outer peripheral side of the magnetic disk 28 when recording / reproducing AV data, if the zone on the outer peripheral side of the magnetic disk 28 is used, the zone on the outer peripheral side generally has a higher data transfer speed. Can be increased, so that AV data can be recorded and reproduced efficiently.
- a spiral track is provided in the zone on the outer circumference side and a concentric track is provided in the zone on the inner circumference side.
- concentric tracks may be provided in the outer zone, and spiral tracks may be provided in the inner zone.
- Such a magnetic disk 28 can be easily manufactured by the master information disk manufacturing method described in the first embodiment.
- a magnetic disk capable of efficiently accessing or recording / reproducing both data and AV data of a computer or the like can be obtained.
- a disk device can be provided.
- a master-one information disk for manufacturing a magnetic disk constituting the magnetic disk device according to claim 1 of the present invention also belongs to the present invention.
- the magnetic disk used in the magnetic disk device of the present invention and the magnetic disk itself manufactured from the master information disk of the present invention also belong to the present invention.
- the magnetic disk drive of the present invention is a data disk that is currently used in the mainstream.
- the data surface servo ctor servo
- the present invention is not limited to this, and a disk device equipped with a plurality of disks, one of which is a dedicated surface for servo, and the other surface while applying servo on that surface.
- the present invention is also applicable to a servo surface servo that records and reproduces data with another head.
- the magnetic disk itself constituting the magnetic disk device when the present invention is applied to a servo surface servo also belongs to the present invention.
- the present invention can efficiently record and reproduce data transferred continuously over time, and perform preformatting of the magnetic disk in a short time and without cost.
- the present invention can provide a magnetic disk device and a master information disk which can perform the above operations.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US09/673,900 US6466385B1 (en) | 1999-02-23 | 2000-02-21 | Method and apparatus of forming a magnetic disk with a servo sector and a data sector on a spiral track |
EP00904053A EP1073043A4 (en) | 1999-02-23 | 2000-02-21 | MAGNETIC DISK DEVICE AND MASTER INFORMATION DISK |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11045223A JP2000251426A (ja) | 1999-02-23 | 1999-02-23 | 磁気ディスク装置及びマスター情報ディスク |
JP11/45223 | 1999-02-23 |
Publications (1)
Publication Number | Publication Date |
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WO2000051113A1 true WO2000051113A1 (fr) | 2000-08-31 |
Family
ID=12713280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/000955 WO2000051113A1 (fr) | 1999-02-23 | 2000-02-21 | Dispositif de disque magnetique et disque d'informations maitre |
Country Status (4)
Country | Link |
---|---|
US (1) | US6466385B1 (ja) |
EP (1) | EP1073043A4 (ja) |
JP (1) | JP2000251426A (ja) |
WO (1) | WO2000051113A1 (ja) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003248923A (ja) * | 2002-02-26 | 2003-09-05 | Fuji Photo Film Co Ltd | 磁気転写用マスター担体の作製方法 |
US6735041B1 (en) * | 2002-03-29 | 2004-05-11 | Western Digital Technologies, Inc. | Method for seeking in a magnetic disk drive having a spiral track |
US6940667B2 (en) | 2002-06-28 | 2005-09-06 | Seagate Technology Llc | Redundant servo pattern stamper |
US6891694B2 (en) * | 2002-08-23 | 2005-05-10 | Hitachi Global Storage Technologies Netherlands B.V. | Method for writing streaming audiovisual data to a disk drive |
JP3979468B2 (ja) * | 2002-08-30 | 2007-09-19 | 富士通株式会社 | 磁気記録媒体のプリフォーマット方法、磁気記録媒体、及び磁気記録再生装置 |
US7274530B2 (en) * | 2003-10-09 | 2007-09-25 | Seagate Technology Llc | Logical mapping for improved head switching between corresponding tracks in a data handling device |
US7397623B2 (en) * | 2003-10-14 | 2008-07-08 | Seagate Technology Llc | Using a mechanical stop for determining an operating parameter of a data handling device |
US7210091B2 (en) * | 2003-11-20 | 2007-04-24 | International Business Machines Corporation | Recovering track format information mismatch errors using data reconstruction |
US7499236B1 (en) | 2004-01-31 | 2009-03-03 | Western Digital Technologies, Inc. | Calibrating correlation between PES and off-track displacement by processing high frequency signal in spiral track |
US6965489B1 (en) | 2004-01-31 | 2005-11-15 | Western Digital Technologies, Inc. | Using an external spiral servo writer to write reference servo sectors and spiral tracks to a disk to facilitate writing product servo sectors to the disk |
JP2006058533A (ja) * | 2004-08-19 | 2006-03-02 | Sharp Corp | 液晶表示装置 |
JP2006114173A (ja) * | 2004-10-18 | 2006-04-27 | Fuji Photo Film Co Ltd | 磁気転写用パターンドマスター担体、磁気記録媒体および磁気記録再生装置 |
US7525109B2 (en) * | 2006-04-12 | 2009-04-28 | Hitachi Global Storage Technologies Netherlands B.V. | Method for writing a large-area closed curvilinear pattern with a cartesian electron beam writing system |
US7619846B2 (en) * | 2006-05-19 | 2009-11-17 | Maxtor Corporation | Self-servo writing using staged patterning |
US8514509B2 (en) * | 2007-03-10 | 2013-08-20 | Rod Brittner | Error tolerant or streaming storage device |
US20140108888A1 (en) * | 2008-03-11 | 2014-04-17 | Rod Brittner | Error tolerant or streaming storage device |
US7839591B1 (en) | 2008-02-11 | 2010-11-23 | Western Digital Technologies, Inc. | Disk drive comprising index spiral track identified by change in sync mark |
JP2009076199A (ja) * | 2008-12-04 | 2009-04-09 | Toshiba Corp | 磁気ディスク装置 |
KR101842133B1 (ko) * | 2016-05-30 | 2018-03-26 | 한국표준과학연구원 | 임프린팅 방식을 이용한 자화상태 제어 방법 |
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- 1999-02-23 JP JP11045223A patent/JP2000251426A/ja active Pending
-
2000
- 2000-02-21 EP EP00904053A patent/EP1073043A4/en not_active Ceased
- 2000-02-21 US US09/673,900 patent/US6466385B1/en not_active Expired - Lifetime
- 2000-02-21 WO PCT/JP2000/000955 patent/WO2000051113A1/ja active Application Filing
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US4644416A (en) | 1984-09-10 | 1987-02-17 | Victor Company Of Japan, Ltd. | Method for recording servo control signals on a magnetic disc |
JPH04102267A (ja) * | 1990-08-20 | 1992-04-03 | Sony Corp | ハード磁気ディスク装置 |
US5583712A (en) * | 1993-06-24 | 1996-12-10 | Maxtor Corporation | Magnetic recording system having spiral tracks |
US5619387A (en) * | 1994-01-21 | 1997-04-08 | International Business Machines Corporation | Disk storage device with spiral data track and incremental error offsets in angularly spaced imbedded concentric servo patterns |
JPH0955016A (ja) * | 1995-08-14 | 1997-02-25 | Sony Corp | ディスク状記録媒体、データ再生方法及び装置 |
JPH09128942A (ja) * | 1995-10-31 | 1997-05-16 | Sony Corp | ディスク型記録再生装置 |
JPH1040544A (ja) | 1996-07-22 | 1998-02-13 | Matsushita Electric Ind Co Ltd | マスター情報坦体およびマスター情報信号の磁気記録媒体への記録方法 |
JPH10312647A (ja) | 1997-05-14 | 1998-11-24 | Toshiba Corp | 磁気ディスク装置及び同装置に適用するディスク・フォーマッティング方法 |
Non-Patent Citations (1)
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Also Published As
Publication number | Publication date |
---|---|
EP1073043A4 (en) | 2008-03-19 |
JP2000251426A (ja) | 2000-09-14 |
EP1073043A1 (en) | 2001-01-31 |
US6466385B1 (en) | 2002-10-15 |
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