CN1087440A - The method and apparatus of magnetic tape track identification - Google Patents

The method and apparatus of magnetic tape track identification Download PDF

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Publication number
CN1087440A
CN1087440A CN 93115071 CN93115071A CN1087440A CN 1087440 A CN1087440 A CN 1087440A CN 93115071 CN93115071 CN 93115071 CN 93115071 A CN93115071 A CN 93115071A CN 1087440 A CN1087440 A CN 1087440A
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China
Prior art keywords
magnetic
track
tape
magnetic track
data
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Pending
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CN 93115071
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Chinese (zh)
Inventor
艾伦R·奥尔森
迈克尔E·哈默利
理查德E·朱伊特
佩尔O·帕尔
理查德W·默尔斯他
罗伯特W·诺潘
西奥多A·施瓦茨
史蒂文R·西曼
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3M Co
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Minnesota Mining and Manufacturing Co
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Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of CN1087440A publication Critical patent/CN1087440A/en
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/54Disposition 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
    • G11B5/55Track change, selection or acquisition by displacement of the head
    • G11B5/5504Track change, selection or acquisition by displacement of the head across tape tracks
    • G11B5/5508Control circuits therefor

Abstract

A kind of magnetic recording tape has write down at least one frame at each at least one end of its a plurality of vertical magnetic tracks and has shown digital encoded data to each particular track identification.The recording/reproducing head stack with regard to tape along vertical transfer path of tape transport and by located lateral.The lateral attitude of recording/reproducing head stack can be monitored in response to the magnetic track recognition data, is positioned desirable magnetic track to guarantee head stack, to prevent on wrong magnetic track record and to prevent data on the playback error magnetic track.

Description

The method and apparatus of magnetic tape track identification
The present invention relates to data cartridge drive, relate in particular to a kind of data cartridge drive of detent mechanism of magnetic tape track recognition methods adopt to(for) multichannel recording/reproducing head stack.
The data cartridge system some the time comprise that the tape of preformatting, this tape are recorded specific sign indicating number figure in advance, are used for record and replay operations are carried out follow-up control.Organize the standard of issuing tape drive and medium exploitation one after another such as " 1/4th inches cartridge drive standard incorporated company " (after this being called QIC) that be positioned at the California St Babara etc.
Be recorded in data on the data tape usually by piece, frame and magnetic track tissue.Piece can be defined as a group record has 512 continuous data bytes to add a header that is made of 8 control bytes as a unit.Frame can be defined as one group of 64 piece that form a complete logical block.Magnetic track then is the longitudinal region on the tape, can write down each piece continuously along this longitudinal region.Header information can be relevant with each piece, except the information of preorder, postorder, data beginning label and this other type of class of other useful information, also comprises the information of magnetic track identifier and so on usually.But on virgin tape, there are not piece and header, virgin tape before virgin tape is regarded as here.Thereby in prior art, on the virgin tape or on unworn magnetic track before any tape, data track is not comprise the magnetic track identifier.
People such as Mo Aileer has disclosed an example of data cartridge system in the United States Patent (USP) 4,424,111 of Dec 20 nineteen eighty-three issue.Mo Aileer provides various digital key patterns, and these digital key patterns all expand to whole tape width equably, forms the key pattern of the adjacent record position of identification.
The tape of prior art can also comprise that the reference burst that is positioned at each magnetic track starting position is used for track location.For some selected track location can be that the preset frequency of 9688FTPI writes down the reference burst such as zero or with for example nominal value, and writes down other reference burst with the nominal frequency of for example 19375FTPI.These reference bursts provide a signal by the identification of head stack control gear, and it makes this mechanism laterally counting reference burst with regard to vertical tape transport of tape.Like this, reference burst provides a kind of mechanism that count down to required track number.But basic pulse does not comprise any numerical data of deciphering, and does not especially comprise any numerical data that specializes the magnetic track identifier.And, find that reference burst coordinates aspect other purposes such as magnetic tape cassette read-write operation useless in prior art.
Can find that another deficiency of reference burst is in the prior art, the magnetic track identification that utilizes this train of impulses is inadequate for the tape of high track density.And the method for prior art can not be discerned each data track on the medium very for certain.
Except the mechanism of explanation before this, the data cartridge record format definition of proposition the servo field or the servo section of record in advance, accurate head position when allowing data recording to medium.The track density that this servo format can obtain is more much higher than following track density that can reach of the situation that does not adopt the head position servo control mechanism.
For example at the United States Patent (USP) 5 of on April 16th, 1991 issue, 008,765 poplar Qwest has proposed a kind of head position servo control mechanism, and it adopts binary code figure, playback time it is recorded on the dedicated magnetic tracks of identification particular track in advance, so that can be finished identification and servo positioning.But in the form that at present QIC is approved, this servo pattern does not contain absolute magnetic track identifying information, and particular track only can begin from the reference position such as the tape edge magnetic track counted indirectly to be determined.Therefore the magnetic track that utilizes servo section information to obtain not is can both be identified for certain under all working condition, and result's indeterminate meeting causes head position in incorrect data track.
If the user data of record just can confirm this track number from the medium sense data before this target data magnetic track contained.But under virgin tape situation for example, the user data of record just can't not confirm track number in this way before magnetic track did not contain.
When data cartridge was recorded for the first time, the total data magnetic track all was blank.On this virgin tape, the each new recording operation on the data track all can run into indeterminate that foregoing magnetic track do not know.If it is wrong that servo search causes in new data magnetic track upper magnetic head location, user data just will be recorded on the wrong data track, thereby make the reliability decrease of recording process.
Referring to Fig. 1, what illustrate is the tram of the recording/reproducing head stack that writes down of the right reference position of data track selected on tape 140.Data track in this example is to comprising data track 60 and 24.Recording/reproducing head stack 10 comprises three transducers 12,14 and 16 respectively.As shown in the figure, transducer 12 is read servosignal from servo track 36.Under to the servo positioning of transducer 12 control, transducer 14 and 16 is positioned and can be at magnetic track 24 and 60 enterprising line items.Like this, the recording/reproducing head stack can be positioned at such as on the servo track 36 the sort of servo tracks by similar the sort of servo control mechanism shown in Figure 5, thereby transducer 14,16 is positioned at respectively on data track 60 and 24.In this example, according to the standard track format, the track location with reference to character direct corresponding physics relevant with magnetic track.That is to say that magnetic track 60 can have the position 60 of physics, magnetic track 24 can have the position 24 of physics, and servo track 36 can have the track location 36 of physics.
Fig. 2 is different with Fig. 1, illustrates that recording/reproducing head stack 10 departs from desirable servo track 36 slightly and situation on adjacent servo track 38.This makes top reocrd changer 14 be in the position rather than the desirable magnetic track 60 of magnetic track 62.Equally, following reocrd changer 16 is also placed magnetic track 26 and rather than magnetic track 24 mistakenly.
As shown in Figure 2, suppose to take place a magnetic track location of mistakes, write head 10 is placed on the wrong servo track, in the present embodiment corresponding to the track location 38 of physics.Because this mistake can't detect, therefore cause chaotic form on new media.When magnetic head the magnetic track of mistake on the potential loss of user data will take place during record.
Different with prior art, its on the one hand the present invention be magnetic recording tape, on the reference position of at least one magnetic track of its a plurality of vertical magnetic tracks, record the digital encoded data that shows at least one frame of particular track identification.
On the other hand, this tape records on each reference position of its a plurality of longitudinal data magnetic tracks and sets up reference burst, and cartridge tape drive can accurately be coordinated the operation that it is read and writes thus.
Among another embodiment, record/playback apparatus comprises a recording/reproducing head stack and makes the mechanism of magnetic head located lateral once tape along vertical transfer path of tape transport.This device also comprises a network, it is in response to the corresponding magnetic head replay signal of magnetic track identification frame that is write down on the residing magnetic track of reality with described magnetic head, discerning actual head position, and do not provide a correct position signalling simultaneously at actual head position and desirable head position.Servo control mechanism is delivered to detent mechanism in response to correct position signalling with a positioning signal, and described head stack is repositioned on the magnetic track of described hope.Can come the lateral attitude of monitor record/playback head assembly subsequently in response to the magnetic track recognition data, be positioned on the desirable magnetic track, avoid, and avoid data on the playback error magnetic track at the enterprising line item of the magnetic track of mistake to guarantee head stack.
The present invention is explanation more all sidedly with reference to the accompanying drawings, and same numeral is corresponding to the same section in several views here.
Fig. 1 schematically shows recording/reproducing head stack when adopting prior art in tram that the selected right original position of data track writes down.
Fig. 2 schematically shows the errors present that the recording/reproducing head stack writes down in the selected right original position of data track when adopting prior art.
Fig. 3 schematically shows the magnetic track identification frame that is positioned at the right original position of selected data track according to the present invention.
Fig. 4 schematically show be recorded in tape selected data track to last user data, each magnetic tape track all comprises magnetic track identification frame and the user data according to the present invention's record here.
Fig. 5 is the block diagram that schematically shows tracking means of the present invention.
Fig. 6 schematically show be recorded in tape selected data track to last user data, each magnetic track comprises according to the magnetic track identification frame of another embodiment of the present invention and sets up reference burst here.
Referring to Fig. 3, this figure schematic illustration is recorded in the magnetic track identification frame on the right reference position of the selected data track of virgin tape.Multiple track magnetic tape cassette 140 comprises that a data track of being made up of magnetic track 24 and 60 is right, be appreciated that, this tape for example can be wide for 1/4 inch (0.635cm), and be loaded with 144 data magnetic tracks that broad ways is arranged, in the magnetic head 12,14 and 16 two to selected magnetic track to carrying out access, and the 3rd magnetic head carries out access to servo track 36.First magnetic track identification frame 70 is recorded in the reference position (promptly leave load point (LP) hole 61 and give set a distance d place) of magnetic track 60, and second magnetic track identification frame 72 is recorded on the reference position of magnetic track 24.
In one example, magnetic track identification frame comprises 52 magnetic track identification blocks and 12 error correction code blocks.Magnetic track identification block and user data block are for the shared identical numbering system of the block address of physics.For example, magnetic track identification frame can have the block address on the address realm upper end, so that distinguish mutually with user data block.
Except can in each magnetic track identification block, comprising the magnetic track identification that starts two bytes, can also comprise out of Memory, the average coercive force of for example tape manufacturer identification, tape serial number, tape build date, tape lot number, tape, LOT and by the out of Memory of tape manufacturers or tape final user appointment.The part of not using in the magnetic track identification block for example can be filled with zero.The magnetic track identification block can also be to not containing user data mark in addition.After magnetic track identification frame, on each magnetic track 60,24, record ED (EOD) mark 74,76.
Magnetic track identification frame can be by tape manufacturers record in advance, perhaps as required, and can be by the data cartridge drive record when using this tape for the first time.Tape manufacturers can be made and not only comprise servo track but also comprise as envisaged by the present invention magnetic track identification frame at the data tape of interior preformatting.
Tape is used for non-user data to the part of records medium made in accordance with the present invention.In an example, 144 data magnetic tracks and 24 servo tracks will be provided, can write down 144 magnetic track identification frames and be used for determining track location.This is corresponding to 3.83 * 10 6Byte capacity.For QIC-10GB record format, these magnetic track identification frames are equivalent to 0.038% of total volume.For QIC-3GB record format, these magnetic track identification frames are equivalent to 0.128% of total volume.If magnetic track identification frame recording is outside the normal recordings zone of using for user data, then capacity is not subjected to of the present invention the influence.
Magnetic track can be discerned any end of frame recording as required at tape.Like this, vertically press in the form of reciprocating structure arrangement at magnetic track, the even number magnetic track can be from reference position (BOT) opening entry of tape, and odd number magnetic track and corresponding magnetic track identification frame thereof then can be from end position (EOT) opening entries of tape.
In a typical operating process, at first will insert data cartridge drive through the data tape of servo formatization, meanwhile, driver controller will make head stack stepping ground across tape, and be positioned servo track.According to the present invention, driver controller also comprises the tape tracker 100 below with reference to Fig. 5 narration.Driver controller is positioned the recording/reproducing head stack for first data track subsequently, and attempts to read first Frame from medium.As long as tape write down user data, no matter be partly to write down or record fully, can be from medium sense data frame.Frame contains the magnetic track identifier by the check of tape drive controller.
Can't be if did after the quite big effort still from the first magnetic track sense data frame, promptly think this medium un-noted or blank.Driver controller is stored in this fact in the storer.When user data will be recorded on these medium, driver controller made the reference position of tape running to tape, if also do not have magnetic track identification frame just to write down magnetic track identification frame in each data track original position.The content of each magnetic track identification frame includes but is not limited to specific magnetic track identifier.Also finish (EOD) mark, come the mark tape not contain user data to show that magnetic track by the magnetic track identifying recording layer that after the identification frame, is right after.
For virgin tape, can make tape running that head stack is positioned the LP mark earlier, again the frame of recording track identification thereon.Head stack can utilize known servo techniques equivalent method to be positioned in turn on each magnetic track.Magnetic track identification frame can be recorded in the original position of each even number magnetic track.When on each even number magnetic track, having write down magnetic track identification frame, just make tape running with head position in 63 places, early warning (EW) hole.Can on each odd number magnetic track, recording track discern frame subsequently.Utilize a plurality of transducer head stacies to allow recording track identification frame on a plurality of magnetic tracks simultaneously.
Referring to Fig. 4, this figure further shows and will be recorded in selected data magnetic track with magnetic track identification frame 70,72 to the user data 80,82 on 60 and 24.Guarantee that according to the driver controller of work of the present invention each data track 60,24 writes down one that contains before the Any user data in the magnetic track identification frame 70,72 on data track.When from this magnetic track reference position, when user data was recorded in a data track for the first time, driver controller is read track identification frame at first, and determined this magnetic track position in the media.Successfully determined head position after desirable track location, driver controller just begins to record the user data on that magnetic track.Driver controller is not being wiped the identification frame subsequently, and does not preferably make under the situation that medium stop, and records the user data in after the magnetic track identification frame.This is that the reliability of this process is desirable, because any pause of medium is all wanted an other magnetic track search and determined operation.
Referring to Fig. 5, with an example of the schematically illustrated tracking means 100 of the present invention of block diagram.Tape 140 comprises servo clothes section and a plurality of data track, and each data track comprises surplus 74 and user data in some cases 80 of magnetic track identification frame 70, end-of-data marker.Tracking means 100 comprises recording/reproducing head stack 10, reads selected servo track and selected data track when being used at tape 140 usually by any one party shown in the arrow 142,144 to vertical tape transport.
Being used to handle in advance, the parts of the servo track pattern of record comprise prime amplifier 102, servo demodulator 104 and digital signal processor 112.Above-mentioned parts can be conventional design, and according to the servo tracking part of the technology groups apparatus for converting of knowing 100.
The parts that are used to handle the magnetic track identification frame data of tape 140 comprise two other prime amplifiers 202,218 and binary channels data demodulator 204.Magnetic-head positioning construction 136, mechanism controls microprocessor 128 and system's control microprocessor 134 are all in response to the control signal that is provided by digital signal processor.Magnetic tape transport 230 is connected with the mechanism controls microprocessor, the such tape transport that tape is schematically shown by usual manner by dotted line 232.The magnetic head 12,14 and 16 that will appreciate that head stack 10 is multi-functional, like this, can make the head stack location according to the control signal of system's control microprocessor 134, make any one servo track that is positioned to select in each magnetic head, and correspondingly link to each other with the servo preamplifier amplifier 108 of appointment, remaining magnetic head then links to each other with 218 with two data prime amplifiers 202.
In the operating process according to the servo track pattern, servo preamplifier amplifier 102 receives the servo track signal 106 of selected servo track section, will export to servo demodulator 104 through amplifying signal 108.
This servo demodulator 104 is exported to digital signal processor 112 in response to signal 108 with position error signal 110.Digital signal processor 112 has departed from selected servo track in response to position error signal if position error signal shows magnetic head selected in the recording/reproducing head stack, just produces a corresponding servo failure signal 122 and gives mechanism controls microprocessor 128.
In operating process according to magnetic track identification frame, when a selected magnetic head read track of recording/reproducing head stack 10 is discerned frame, 202 of one of data prime amplifier receives the first magnetic track identification data signals 206 by the first selected data magnetic track, and to first data-signal 208 of binary channels data demodulator 204 outputs through amplifying.Equally, another data prime amplifier 218 receives the second magnetic track identification data signals 216 by the second selected data magnetic track, and will deliver to second input end of binary channels data demodulator 204 through second data-signal 220 that amplifies.
Binary channels data demodulator 204 is given system's control microprocessor 134 in response to signal 208 and 220 with the head position signal 210 of reality.Actual head position signal identifies the actual residing magnetic track of each magnetic head.
Except the head position signal 210 of reality, system's control microprocessor also receives the status information from mechanism controls microprocessor 128 on data line 132.System's control microprocessor can provide magnetic track to select and action directive signal 130 expediently, and it comprises the position correction signal in response to status information on actual head position signal 210 and the data line 132.If actual head position signal 210 shows that the magnetic track that magnetic head is located is not desirable magnetic track, then position correction signal is delivered to the mechanism controls microprocessor.Mechanism controls microprocessor 128 also produces transfers to the servo-control signal 124 that digital signal processor 112 is handled, and its controlling recording/playback head assembly 10 is locked to a selected servo track.
Mechanism controls microprocessor 128 is in response to servo lock failure signal 122, and magnetic track selection control command signal 130, produces a position and adjusts signal 126.Magnetic-head positioning construction receives this position and adjusts signal 126, by the mode of routine, for example makes stepping motor work rotate screw, shown in dotted line 138 head position is adjusted.
Referring to Fig. 6, this illustrates is the selected data track that will be recorded in tape 140 to the user data on 24 and 60, and each magnetic track comprises magnetic track identification frame 70,72 of the present invention and sets up reference burst 90,92 here.Benchmark is set up train of impulses 90,92 and is preferably discerned frame 70,76 record simultaneously with magnetic track.See through present disclosure and will be understood that, though just seldom the exemplary magnetic track that illustrates, reference burst and magnetic track identification frame can be conveniently used in all magnetic tracks of multiple track tape.
Set up in the example of reference burst invention in employing, set up basic pulse by writing on the regulation subclass of selected magnetic track with the corresponding structure of specific magnetic head component pattern.These selected magnetic tracks needn't rewrite afterwards because they will be used as after tape user's recording parameters benchmark.When format also the pattern recording of reference burst but not on the part of selected subclass at the magnetic track of remainder.But these magnetic tracks can at any time be rewritten and/or wipe.
The reference burst pattern is made up of two sections continuous equal lengths, frequency record constant but inequality." the normal preorder " of regulation is identical in the 8.1.1 joint of first frequency and QIC-91-42 Rev.C, is made up of the bitmap for " 1 " and " 0 " alternately.This can also be described as flux peak density, high-frequency grid figure.
Set up the reference burst pattern the first frequency composition can from the tape hole that detects beginning of tape (BOT) to after 3 to 4 inches between described magnetic track reference position begin to write minimum 25 inches (63.5cm) (when when end of tape (EOT) moves).When writing the odd number magnetic track, 3 to 4 inches (10.2cm) of high frequency grid figure after detecting the EOT hole (when when tape BOT moves), and continue to have write minimum 25 inches (63.5cm) up to grid figure.In the conventional method of this example, magnetic track identification frame 70,72 for the even number magnetic track from load point (LP) hole 61, for the odd number magnetic track then from early warning (EW) hole 63.End-of- data marker 74,76 and user data 80,82 typically are connected on after the magnetic track identification frame.
It is identical with " the prolongation preorder " of 8.1.1 joint regulation among the QIC-91-42 Rev.C to set up the second frequency composition that reference burst will write, by alternately forming for the bit sequence of " 1 " and 7 " 0 " (promptly 10000000).This signal may be prescribed as " writing balanced F/4 " (" Write Equalized F/4 ") pattern.This pattern is right after after normal preorder and writes, and till detecting load point hole or early warning hole, two kinds of situations are any can.
Bifrequency basic pulse string format makes tape drive can accurately coordinate its read-write operation, to guarantee the interchangeability of tape.This reference burst of setting up is of great use for the cartridge drive that has reset fine setting and formatter, and it has the ability of adjusting the read-write fine setting before the beginning that reads and writes data.Formatter writes initial record, and this record is the record specification of accord with Q IC WEQ easily.Be used for the driver that on this tape, writes by the following method step use:
A. selected magnetic track on two recording parameterses are set up the reference burst adjustment fine setting of resetting, make from the peak-peak amplitude of setting up two signals that reference burst obtains identical.Used information needn't be controlled by automatic gain.This also is considered to 100% resolution situation.
B. magnetic head is moved on the new magnetic track that allows rewriting or erasing pulse string.Wipe the train of impulses district on the new magnetic track, utilize the side resolution adjustment that writes of nominal that some recording parameters reference bursts are duplicated.
C. by readout resolution fixedly being compensated the resolution that writes of formatter, the resolution that the test benchmark train of impulses duplicates.If the resolution of duplicating is different with the resolution of formatter, just writes again, and correspondingly adjust the resolution that writes side.Test, the error of setting up between the reference burst up to recording parameters that duplicate and initial selected magnetic track is enough little again.
If above process is finished when each tape inserts, then All Drives will write with essentially identical resolution, form be put in place guarantee adjustable record in case of necessity.
The present invention is done quite detailed narration meeting Patent Law at this, and provide information required when using new principle and formation and using this special-purpose member to those skilled in the art on request.But, should be appreciated that this invention can be realized by different equipment and different schemes, for device specifics and running program, can do various changes under the situation that does not break away from the protection domain of invention own.

Claims (9)

1, a kind of magnetic recording tape is characterized in that, write down at least one frame at each at least one end of its a plurality of longitudinal data magnetic tracks and shown digital encoded data each particular track identification, the lateral attitude of recording/reproducing head stack can with tape along the longitudinal the transfer path tape transport carry out located lateral, this lateral attitude is monitored to guarantee that head stack is positioned required magnetic track, thereby prevent to record on the wrong magnetic track and prevent the data of playback error magnetic track.
2, magnetic recording tape as claimed in claim 1, it is characterized in that this tape also comprises a plurality of servo tracks, adopt them in order that handle, to allow when writing down and reset the data of selecting magnetic track, making magnetic head accurately be positioned this selected track location place by the detent mechanism of recording/reproducing head stack.
3, magnetic recording tape as claimed in claim 1 is characterized in that tape comprises that also being recorded in a plurality of benchmark adjacent with magnetic track identification frame on each magnetic track establishes train of impulses.
4, a kind of magnetic recorder/reproducer, it is characterized in that and to use with a kind of magnetic recording tape, write down at least one frame at each at least one end of a plurality of longitudinal data magnetic tracks that stretch along tape and shown that described device comprises to the digital encoded data of each particular track identification:
(a) make the magnetic tape transport device of described tape along described transfer path tape transport;
(b) a magnetic recording/reproducing magnetic head;
(c) make the device of described magnetic head located lateral in the selected end of one of described longitudinal data magnetic track of discerning frame near described magnetic track;
(d) in response to one with the actual magnetic track of living in of described magnetic head on the corresponding magnetic head replay signal of magnetic track identification frame that writes down, determine described actual head position, and when actual head position is different from desirable head position, provide the device of a correction position signal;
(e) in response to the correction position signal, send a positioning signal to give the location device, make described head stack re-position at the servo control mechanism device of described desired magnetic track.
5, a kind of magnetic tape track method of inspection is characterized in that this magnetic recording has a plurality of longitudinal data magnetic tracks that stretch along tape, but comprise the magnetic recording/reproducing magnetic head of a located lateral in cartridge tape drive, and the method may further comprise the steps:
(a) make each at least one end in a plurality of longitudinal data magnetic tracks write down at least one frame and show digital encoded data each particular track identification;
(b) make described tape along a transfer path tape transport;
(c) make described magnetic head located lateral in described longitudinal data magnetic track selected;
(d) reset from the described magnetic track identification frame of selected magnetic track discerning actual track location, if actual head position just provides a correction position signal when being different from desirable head position;
(e), provide a positioning signal to be used for making head stack to re-position at the magnetic track of described hope in response to the correction position signal.
6, method as claimed in claim 5, it is characterized in that using with the tape that comprises a plurality of servo tracks, the method also comprises: with data recording to medium or when media-playback goes out data, in response to the signal that obtains from least one servo track, to keep the step of accurate head position.
7, method as claimed in claim 5 is characterized in that further comprising the steps of:
(a) read track identification frame;
(b) check track location;
(c) after successfully checking track location, just under the situation of not wiping magnetic track identification frame and tape transport being paused, record the user data on the magnetic track of magnetic track after discerning frame.
8, method as claimed in claim 6 is characterized in that further comprising the steps of:
(a) read track identification frame;
(b) check track location;
(c) after successfully checking track location, just under the situation of not wiping magnetic track identification frame and tape transport being paused, record the user data on the magnetic track of magnetic track after discerning frame.
9, a kind of method of finely tuning cartridge tape drive is characterized in that this driver comprises the playback micro actuator and has the formatter of reading and write resolution, and the method may further comprise the steps:
(a) set up reference burst at each reference position record one of its a plurality of longitudinal data magnetic tracks;
(b) set up reference burst adjustment playback micro actuator to two, make by the peak-peak amplitude of setting up two signals that reference burst obtains identical;
(c) utilize the side resolution that writes of a nominal to adjust and set up reference burst to one and duplicated;
(d) by making playback resolution fixedly compensate the resolution that writes of formatter, the resolution of setting up benchmark arteries and veins string copy is tested;
(e) different if set up the resolution of reference burst copy with the resolution of formatter, just write again and corresponding adjustment writes side resolution, test again, when the resolution of setting up reference burst copy is complementary with the formatter resolution basically till.
CN 93115071 1992-11-20 1993-11-20 The method and apparatus of magnetic tape track identification Pending CN1087440A (en)

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US97980592A 1992-11-20 1992-11-20
US07/979,805 1992-11-20

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CN111344786A (en) * 2017-11-09 2020-06-26 国际商业机器公司 Hybrid servo pattern configuration for magnetic tape
CN111344786B (en) * 2017-11-09 2021-03-09 国际商业机器公司 Tape drive method, apparatus and product for tape hybrid servo patterns

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