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公开(公告)号：SG34301A1
公开(公告)日：1996-12-06
申请号：SG1995001807
申请日：1995-11-10
Applicant: IBM
Inventor： YARMCHUK EDWARD JOHN , SCHULTZ MARK D , WEBB BUCKNELL C , CHAINER TIMOTHY JOSEPH
Abstract: During a write revolution of a storage medium, a transition is written on the storage medium while servoing on another transition previously recorded on the storage medium. During that write revolution, a position error signal corresponding to the position error of the transducer relative to the previously recorded transition is determined. That position error signal is then stored, during the write revolution, to be used in computing a reference track value associated with the transition being written to correct for the position error. Additionally, a product servo-pattern is written, which includes an embodying of the position error therein.
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公开(公告)号：CA2163689A1
公开(公告)日：1996-06-03
申请号：CA2163689
申请日：1995-11-24
Applicant: IBM
Abstract: A mechanism for servowriting on a storage medium of a storage device. The storage device has a transducer and a servo loop for positioning the transducer with respect to the storage medium. At least one transition is written on a track of the storage medium, while servoing o n other transitions previously recorded on the storage medium. A reference waveform is derived as a functio n of a closed loop response of the servo loop and a position error waveform. The position error waveform corresponds to one or more position errors of the transducer relative to the previously recorded transitions. The reference waveform is usable in writing subsequent tracks on the storage medium. Using the reference waveform for writing subsequent tracks provides a substantial rejection of mechanical disturbance s by the servo loop.
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公开(公告)号：GB2500965A
公开(公告)日：2013-10-09
申请号：GB201301546
申请日：2013-01-29
Applicant: IBM
Inventor： PARIDA PRITISH RANJAN , CHAINER TIMOTHY JOSEPH , IYENGAR MADHUSUDAN , MILNES DAVID PAUL , SIMONS ROBERT
Abstract: A cooling system such as an intra-rack cooling system 500 of a data centre comprises: one or more nodes, such as servers 300, each node having at least one temperature sensor to monitor a temperature of the node components; an air-to-liquid heat exchanger 402 configured to accept a liquid coolant input, preferably via a first shut-off valve 504, to provide cooled air to the one or more nodes; and a temperature sensor to monitor a temperature of air Tai provided by the heat exchanger. The cooling system also comprises a direct liquid cooling apparatus to provide liquid coolant to components of the one or more nodes, preferably an inlet plenum 404, i.e. manifold, and an outlet plenum 406. The apparatus supplies cold input coolant 412, preferably via a second shut-off valve 506, to the one or more nodes and ejects warm coolant 410. A valve, ideally a three-way valve 502, is configured to control a proportion of the coolant flow directed to the heat exchanger and the one or more nodes based upon the monitored temperatures. A flow rate of coolant is also controlled based upon the monitored temperatures, preferably by varying the pump strength of a pump 401.
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公开(公告)号：MY128973A
公开(公告)日：2007-03-30
申请号：MYPI9702018
申请日：1997-05-07
Applicant: IBM
Inventor： CHAINER TIMOTHY JOSEPH , SCHULTZ MARK DELORMAN , WEBB BUCKNELL CHAPMAN , YARMCHUK EDWARD JOHN
Abstract: METHODS AND SYSTEMS FOR SELF-SERVOWRITING A DATA STORAGE MEDIUM ARE DISCLOSED, INCLUDING SERVOING TO PROPAGATION BURSTS OF A PROPAGATION PATTERN LOCATED IN TRACKS OTHER THAN AN IMMEDIATELY PRECEDING TRACK. REFERENCE LEVELS USED TO POSITION A RECORDING HEAD ARE ACCORDINGLY KEPT IN A USABLE DYNAMIC RANGE NECESSARY TO KEEP SERVO TRACK SPACING CONSTANT ACROSS THE MEDIUM. THE METHODS AND SYSTEMS ARE DISCLOSED IN CONNECTION WITH A ROTARY ACTUATOR HAVING SPACED READ AND WRITE HEADS. SIMILAR METHODS ARE DISCLOSED FOR WRITTING TRIGGER OR TIMING BURSTS OF THE PROPAGATION PATTERN.(FIG 4)
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公开(公告)号：HU222296B1
公开(公告)日：2003-06-28
申请号：HU9801391
申请日：1995-03-13
Applicant: IBM
Inventor： CHAINER TIMOTHY JOSEPH , SOHN WAYNE JAY , YARMCHUK EDWARD JOHN
IPC: G11B5/596
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Patent Agency Ranking
公开(公告)号：DE69525323T2
公开(公告)日：2002-10-02
申请号：DE69525323
申请日：1995-11-03
Applicant: IBM
Inventor： CHAINER TIMOTHY JOSEPH , PRAINO ANTHONY PAUL , SCHULTZ MARK DELORMAN , WEBB BUCKNELL CHAPMAN , YARMCHUK EDWARD JOHN
Abstract: Improvements in placement of timing patterns in self servo writing include correcting for random and systematic errors due to geometric effects. In a disk drive having a recording head with separate read and write elements, a method for determining separation between the elements and for correcting for such errors as a function of skew angle between the head and the disk. Errors resulting from misalignment and non-parallelism of the elements as well as misalignment of the head on it its actuator are also detected and corrected. Errors due to changes in rotational velocity of the disk and misplacement of timing patterns with respect to adjacent timing patterns are detected and corrected. In general, a single revolution process may be used to both write and detect random errors on each track and corrected on subsequent tracks.
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公开(公告)号：DE69612778T2
公开(公告)日：2001-10-11
申请号：DE69612778
申请日：1996-02-13
Applicant: IBM
Inventor： CHAINER TIMOTHY JOSEPH , HERMAN JR , KRONGELB SOL , ROMANKIW LUBOMYR TARAS , YARMCHUK EDWARD JOHN
Abstract: An integrated data storage disk and disk drive assembly includes a rotatably supported magnetic disk for storing data. A rotor is fixedly joined to the disk for rotating the disk, and includes a plurality of rotor poles. A stator includes a plurality of stator poles positioned around the rotor for sequentially cooperating with respective ones of the rotor poles for rotating the rotor to rotate the disk. The disk and drive may be fabricated using lithographic and electroplating techniques, and a plurality of coaxial disks may be driven by a single disk drive in exemplary embodiments.
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公开(公告)号：SG71034A1
公开(公告)日：2000-03-21
申请号：SG1997002589
申请日：1995-11-10
Applicant: IBM
Inventor： CHAINER TIMOTHY JOSEPH , PRAINO ANTHONY PAUL , SCHULTZ MARK DELORMAN , WEBB BUCKNELL CHAPMAN , YARMCHUK EDWARD JOHN
Abstract: Improvements in placement of timing patterns in self servo writing include correcting for random and systematic errors due to geometric effects. In a disk drive having a recording head with separate read and write elements, a method for determining separation between the elements and for correcting for such errors as a function of skew angle between the head and the disk. Errors resulting from misalignment and non-parallelism of the elements as well as misalignment of the head on it its actuator are also detected and corrected. Errors due to changes in rotational velocity of the disk and misplacement of timing patterns with respect to adjacent timing patterns are detected and corrected. In general, a single revolution process may be used to both write and detect random errors on each track and corrected on subsequent tracks.
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公开(公告)号：SG52990A1
公开(公告)日：1998-09-28
申请号：SG1997002063
申请日：1997-06-14
Applicant: IBM
Inventor： CHAINER TIMOTHY JOSEPH , SCHULTZ MARK DELORMAN , WEBB BUCKNELL CHAPMAN , YARMCHUK EDWARD JOHN
Abstract: An improved servowriting system and method whereby errors introduced into the written servo information are reduced or eliminated for greater servowriting accuracy. Accuracy is enhanced by one or more of the following improvements: 1) optimizing write current and write frequency to minimize write width modulation; 2) optimizing the RPM of the storage medium to minimize random mechanical vibration; and 3) providing a clip level check to eliminate the introduction of large errors in product servopattern. The proposed improvements provide substantial rejection of, for example, mechanical and magnetic disturbances, ensuring a robust servowriting process.
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50.发明专利
公开(公告)号：CZ9702752A3
公开(公告)日：1998-01-14
申请号：CZ275297
申请日：1995-03-13
Applicant: IBM
Inventor： CHAINER TIMOTHY JOSEPH , SOHN WAYNE JAY , YARMCHUK EDWARD JOHN
IPC: G11B21/10 , G11B20060101 , G11B5/596
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