Patents by Inventor Giovanni Cherubini

Giovanni Cherubini has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for writing a servo pattern to a magnetic tape medium with magnetically encoded servo band bursts
    Patent number: 9514769
    Abstract: A method for writing a servo pattern to a magnetic tape medium by a write head is described. The write head includes a coil configured to generate a magnetic flux when applying an electric current thereto, and a pole piece structure configured to guide the generated magnetic flux. The method includes moving the magnetic tape medium with its servo band above the two gaps in a direction along the longitudinal extension of the magnetic tape medium, applying a current pulse to the coil, continuing to move the magnetic tape medium, and applying another current pulse to the coil. The magnetic tape medium includes at least one servo band along the longitudinal extension of the tape medium having servo patterns organized in servo frames for supporting to determine positional information.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: December 6, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Giovanni Cherubini, Johan B. C. Engelen, Simeon Furrer, Mark A. Lantz
  • TAPE HEAD ASSEMBLY FOR LINEAR TAPE
    Publication number: 20160351218
    Abstract: A tape head assembly includes a set of data readers configured to simultaneously read data from a set of adjacent data tracks of a tape storage medium, each data track having a width; wherein the width of each data reader of the set along a lateral extension of the tape head assembly is equal to or less than the width of a data track wherein the lateral extension of the tape head assembly is orthogonal to a longitudinal extension of the tape storage medium when arranged in a tape drive containing the tape head assembly spanning at least the set of data tracks during reading; and a servo reader arrangement containing at least one servo reader arranged laterally offset from one of the data readers by less than the width of a data track.
    Type: Application
    Filed: August 11, 2016
    Publication date: December 1, 2016
    Inventors: Giovanni Cherubini, Simeon Furrer, Jens Jelitto, Mark A. Lantz
  • MANAGING BEAMFORMED SIGNALS TO OPTIMIZE TRANSMISSION RATES OF SENSOR ARRAYS
    Publication number: 20160337020
    Abstract: Technology for managing beamformed signals. A method includes: receiving beamformed signals from one or more arrays of receiving elements, which one or more arrays of receiving elements send beamformed signals at given transmission rates; recovering information from the received beamformed signals; measuring a quality of the recovered information, using a metric that estimates a distance between the recovered information and reference information; and, based on the measured quality, instructing the one or more arrays of receiving elements to change the transmission rates at which they send beamformed signals.
    Type: Application
    Filed: May 11, 2015
    Publication date: November 17, 2016
    Inventors: Giovanni Cherubini, Paul T. Hurley, Orhan Ocal
  • Tape head assembly for linear tape
    Patent number: 9495986
    Abstract: A tape head assembly includes a set of data readers configured to simultaneously read data from a set of adjacent data tracks of a tape storage medium, each data track having a width; wherein the width of each data reader of the set along a lateral extension of the tape head assembly is equal to or less than the width of a data track wherein the lateral extension of the tape head assembly is orthogonal to a longitudinal extension of the tape storage medium when arranged in a tape drive containing the tape head assembly spanning at least the set of data tracks during reading; and a servo reader arrangement containing at least one servo reader arranged laterally offset from one of the data readers by less than the width of a data track.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: November 15, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Giovanni Cherubini, Simeon Furrer, Jens Jelitto, Mark A. Lantz
  • ADJUSTABLE INTERPOLATION SAMPLING INTERVAL FOR TAPE SYSTEMS
    Publication number: 20160300593
    Abstract: In one general embodiment, a method includes determining a sampling interval for an interpolator using at least one of: predefined data stored in memory, and a standard deviation of a position error signal. The method further includes applying the sampling interval to the interpolator in response to determining the sampling interval. In another general embodiment, an apparatus includes an interpolator and a controller. The controller is configured to determine a sampling interval for the interpolator using at least one of: predefined data stored in memory, and a standard deviation of a position error signal. The controller is also configured to apply the sampling interval to the interpolator in response to determining the sampling interval.
    Type: Application
    Filed: April 7, 2015
    Publication date: October 13, 2016
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Giovanni Cherubini, Simeon Furrer, Robert A. Hutchins, Jens Jelitto
  • Controlling the transport of a tape within a tape transport system
    Patent number: 9449638
    Abstract: A control device for controlling the transport of a tape within a tape transport system, the tape transport system having a head being operable to read data from and/or write data to the tape, an outboard reel and an inboard reel, wherein the tape is moveable from the outboard reel to the inboard reel in forward direction or from the inboard reel to the outboard reel in reverse direction, wherein the control device is adapted to generate control signals to control the velocity of the outboard reel and the velocity of the inboard reel as a function of a primary velocity of the tape at the head and a secondary velocity of the tape at the inboard reel and/or a secondary velocity of the tape at the outboard reel.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: September 20, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Giovanni Cherubini, Jens Jelitto, Eiji Ogura, Angeliki Pantazi
  • Write head for a magnetic tape medium with magnetically encoded servo band bursts
    Patent number: 9443539
    Abstract: A write head for writing a servo pattern to a magnetic tape medium includes a first coil configured to generate a first magnetic flux when applying an electric current to the first coil, a second coil configured to generate a second magnetic flux when applying an electric current to the second coil, and a pole piece structure configured to guide the generated magnetic flux. The pole piece includes a first ring structure for guiding the first magnetic flux, a second ring structure for guiding the second magnetic flux, and a common section of the first and the second ring structure which common section is arranged between the first coil and the second coil. The write head further includes a section containing a gap in each of the first ring structure and the second ring structure. The magnetic flux is oriented in opposite directions across the two gaps.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: September 13, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Giovanni Cherubini, Johan B. C. Engelen, Simeon Furrer, Mark A. Lantz
  • Skew estimation for a tape storage device
    Patent number: 9390759
    Abstract: An apparatus for operating a tape storage device comprises a tape skew estimation unit for estimating a value related to a skew of a tape storage medium arranged in the tape storage device relative to a head module of the tape storage device. A servo pattern decoder is configured to decode information encoded in a servo pattern written to one or more servo bands of the tape storage medium based on read-back signals of at least two servo readers of the tape storage device arranged for reading the servo pattern from the one or more servo bands and based on the estimated skew related value.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: July 12, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Giovanni Cherubini, Simeon Furrer, Jens Jelitto, Kazuhiro Tsuruta
  • TAPE HEAD ASSEMBLY FOR LINEAR TAPE OPEN
    Publication number: 20160180872
    Abstract: A tape head assembly includes a set of data readers configured to simultaneously read data from a set of adjacent data tracks of a tape storage medium, each data track having a width; wherein the width of each data reader of the set along a lateral extension of the tape head assembly is equal to or less than the width of a data track wherein the lateral extension of the tape head assembly is orthogonal to a longitudinal extension of the tape storage medium when arranged in a tape drive containing the tape head assembly spanning at least the set of data tracks during reading; and a servo reader arrangement containing at least one servo reader arranged laterally offset from one of the data readers by less than the width of a data track.
    Type: Application
    Filed: February 29, 2016
    Publication date: June 23, 2016
    Inventors: Giovanni Cherubini, Simeon Furrer, Jens Jelitto, Mark A. Lantz
  • Servo control
    Patent number: 9343093
    Abstract: A tape head includes a set of one or more segments, wherein each segment of the set is individually movable with respect to a frame; each segment of the set comprising at least one of a write element configured to write data to a tape and a read element configured to read data from the tape; and each segment of the set comprising a further read element having a width transverse to a motion direction of the tape being at least a width of the write element of the segment or, in the event that no write element is comprised in the segment, of a write element of a different segment.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: May 17, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Giovanni Cherubini, Jens Jelitto, Mark A. Lantz
  • Magnetic tape storage medium
    Patent number: 9330700
    Abstract: A magnetic tape storage medium includes at least one servo band with at least two sub-bands along a longitudinal extension of the medium. Servo bursts are written to the sub-bands to determine positional information of the medium. A first of the sub-bands includes a first burst with at least one servo stripe inclined at a first non-zero angle with respect to a direction orthogonal to the longitudinal extension of the medium followed by a second burst comprising at least one servo stripe inclined at a second non-zero angle with respect to the direction orthogonal to the longitudinal extension of the medium, which second angle is different from the first angle. A second of the sub-bands includes a first burst having at least one servo stripe followed by a second burst having at least one servo stripe, the first and the second bursts parallel to each other.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: May 3, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Giovanni Cherubini, Simeon Furrer, Jens Jelitto, Mark A. Lantz
  • Detecting a servo pattern using a data channel in a magnetic tape drive
    Patent number: 9324348
    Abstract: In one embodiment, a system for processing data includes an equalizer having a finite impulse response (FIR) filter configured to process data read with a channel using servo coefficients to generate equalized data, and one or more low-pass filters configured to filter the equalized data to output filtered data. The one or more low-pass filters is configured to remove high frequency noise from the equalized data. A method for processing data in a read channel, in one embodiment, includes receiving data read from a magnetic tape using the read channel of a magnetic tape drive. A finite impulse response (FIR) filter is applied to the data by an equalizer using servo coefficients to output equalized data. One or more low-pass filters is applied to the equalized data to obtain filtered data, the one or more low-pass filters being configured to remove high frequency noise from the equalized data.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: April 26, 2016
    Assignee: International Business Machines Corporation
    Inventors: Katherine T. Blinick, Giovanni Cherubini, Robert A. Hutchins, Jens Jelitto
  • Magnetic data storage apparatus for use with linear recording media having a reduced servo band width
    Patent number: 9324349
    Abstract: In one embodiment, a magnetic data storage apparatus includes a magnetic head having at least one group of N servo readers, a drive mechanism for passing a linear magnetic recording medium over the head, and a controller electrically coupled to the head. The controller is configured to position a first servo reader of the at least one group of N servo readers in a first lateral medium region of the recording medium with a servo band having a width b that is less than or equal to about 1.2 B/N, where N is an integer greater than or equal to 2, and B corresponds to a distance between data read/write transducers of the magnetic head, and position the magnetic head in a second lateral region of width b with a second servo reader of the at least one group of N servo readers for reading the servo band.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: April 26, 2016
    Assignee: International Business Machines Corporation
    Inventors: Giovanni Cherubini, Jens Jelitto, Mark A. Lantz
  • DEVICE AND METHOD FOR RECEIVING SIGNALS BY A PLURALITY OF RECEIVING ARRAYS
    Publication number: 20160099502
    Abstract: Device and method for receiving signals by a plurality of receiving arrays. The device includes a plurality L of receiving arrays, each of the L receiving arrays including: a respective number L1, L2, . . . , LL of receiving elements and being adapted to generate time-series output data signals based on received signals; a randomizing unit adapted to generate a randomized matrix for each of the receiving arrays, each of the randomized matrices having a respective a dimensionality M1, M2, . . . , ML, wherein M1<L1, M2<L2, . . . , ML<LL, wherein each of the generated randomized matrices is applied to the corresponding receiving array of the plurality L of receiving arrays to perform beamforming across each of the receiving arrays of plurality L of receiving arrays; and an output unit adapted to output beamformed time-series output data signals.
    Type: Application
    Filed: October 2, 2015
    Publication date: April 7, 2016
    Inventors: Giovanni Cherubini, Paul Hurley, Orhan Oecal
  • Tape head assembly for linear tape open
    Patent number: 9305580
    Abstract: A tape head assembly includes a set of data readers configured to simultaneously read data from a set of adjacent data tracks of a tape storage medium, each data track having a width; wherein the width of each data reader of the set along a lateral extension of the tape head assembly is equal to or less than the width of a data track wherein the lateral extension of the tape head assembly is orthogonal to a longitudinal extension of the tape storage medium when arranged in a tape drive containing the tape head assembly spanning at least the set of data tracks during reading; and a servo reader arrangement containing at least one servo reader arranged laterally offset from one of the data readers by less than the width of a data track.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: April 5, 2016
    Assignee: International Business Machines Corporation
    Inventors: Giovanni Cherubini, Simeon Furrer, Jens Jelitto, Mark A. Lantz
  • STORAGE SYSTEM
    Publication number: 20160085469
    Abstract: A method for storing a data segment in a storage tier of a storage unit comprising at least two storage tiers includes receiving the data segment to be stored including metadata; receiving metadata of data segments stored in the storage unit; and determining the storage tier to store the received data segment to and a protection level dependent on the metadata received and dependent on the metadata of the received data segment.
    Type: Application
    Filed: December 10, 2015
    Publication date: March 24, 2016
    Inventors: Giovanni Cherubini, Ilias Iliadis, Jens Jelitto, Vinodh Venkatesan
  • STORAGE SYSTEM
    Publication number: 20160070492
    Abstract: A method for storing a data segment in a storage tier of a storage unit comprising at least two storage tiers includes receiving the data segment to be stored including metadata; receiving metadata of data segments stored in the storage unit; and determining the storage tier to store the received data segment to and a protection level dependent on the metadata received and dependent on the metadata of the received data segment.
    Type: Application
    Filed: August 18, 2015
    Publication date: March 10, 2016
    Inventors: Giovanni Cherubini, Ilias Iliadis, Jens Jelitto, Vinodh Venkatesan
  • STORAGE SYSTEM
    Publication number: 20160062689
    Abstract: A storage system and a method for storing a data segment, a storage capacity manager and a method for managing a capacity of a storage unit, and a storage tier relocation manager and a method for relocating a data segment. The storage system includes at least two storage tiers, an access pattern evaluator, a classification unit, a selector, and logic. The storage capacitor manager includes a monitoring unit and capacity managing unit. The storage tier relocation manager includes a target storage tier, the data segment relocated to the target storage tier, and a protection measure.
    Type: Application
    Filed: August 27, 2015
    Publication date: March 3, 2016
    Inventors: Giovanni Cherubini, Ilias Iliadis, Jens Jelitto, Vinodh Venkatesan
  • Wear leveling
    Patent number: 9274944
    Abstract: A method for operating a computer memory and a storage device. The memory is organized to store data in units of such memory. For each unit of a set of units a wear level of the unit is determined. A maximum wear level among the wear levels is determined. A suggestion of a subset of one or more units for being selected for data erasure is received and at least one unit in the subset is identified for subsequent data erasure, a wear level (c(i)) of which units (i) is less than the maximum wear level (c_max).
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: March 1, 2016
    Assignee: International Business Machines Corporation
    Inventors: Giovanni Cherubini, Ilias Iliadis
  • Magnetic tape storage medium
    Patent number: 9263073
    Abstract: A magnetic tape storage medium includes at least one servo band with at least two sub-bands along a longitudinal extension of the medium. Servo bursts are written to the sub-bands to determine positional information of the medium. A first of the sub-bands includes a first burst with at least one servo stripe inclined at a first non-zero angle with respect to a direction orthogonal to the longitudinal extension of the medium followed by a second burst comprising at least one servo stripe inclined at a second non-zero angle with respect to the direction orthogonal to the longitudinal extension of the medium, which second angle is different from the first angle. A second of the sub-bands includes a first burst having at least one servo stripe followed by a second burst having at least one servo stripe, the first and the second bursts parallel to each other.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: February 16, 2016
    Assignee: International Business Machines Corporation
    Inventors: Giovanni Cherubini, Simeon Furrer, Jens Jelitto, Mark A. Lantz