Abstract: A recording head has a first magnetic writer and a second magnetic writer offset from the first magnetic writer in a downtrack and crosstrack direction. The recording head has leads configured to deliver respective first and second write and/or laser currents to the first and second writers. The first and second write and/or laser currents enable the first and second writers to simultaneously write to adjacent tracks of a magnetic disk.

Abstract: A first set of bottom tracks is written via a first head that is moved via a first actuator over a surface of a disk. A second set of top tracks interlaced between and partially overlapping the bottom tracks via a second head that is moved via a second actuator over the surface of the disk independently of the first actuator and first head.

Abstract: Bottom tracks are written to a recording medium using a first setting of a microwave assisted magnetic recording (MAMR) head. Top tracks are interlaced between and partially overlapping the bottom tracks using a second setting of the MAMR head, the second setting resulting in a narrower track width than the first setting.

Abstract: First and second tracks of a magnetic recording medium are read simultaneously via a first reader that provides a first signal based on detecting a total perpendicular field of the first and second tracks. The first and second tracks are read simultaneously via a second reader that provides a second signal based on detecting a total longitudinal field of the first and second tracks. Data is detected from the first and second signals.

Abstract: A method for performing a flaw scan test on a hard disk drive is disclosed. The hard disk drive includes a magnetic recording medium and spindle motor associated with a predetermined rated speed. The method includes writing a test pattern to the magnetic recording medium while operating the spindle motor at a speed greater than the predetermined rated speed. The method also includes reading the test pattern at the greater speed and detecting flaws in response to reading the test pattern.

Abstract: Systems and methods for timing recovery in DNA storage systems is described. In one embodiment, the present systems and methods include generating a unique pattern of DNA bases and use the unique pattern for a phase-locked loop (PLL) field of a data layout, generating a multidimensional mapping, configuring the multidimensional mapping to include one or more prohibited sequences of DNA bases, identifying a prohibited sequence from the multidimensional mapping and use the prohibited sequence for one or more synch-mark (SM) fields of the data layout, prohibiting a User Data field from using any of the prohibited sequences of DNA bases when converting binary data to DNA bases, identifying random insertion and/or deletion of DNA bases in the User Data field, and repairing the random insertion and/or deletion of DNA bases in the User Data field.

Abstract: Two or more read modes of a data storage system and device are defined. The data storage device is capable of concurrently reading from two or more tracks using two or more read transducers. The read modes utilize different numbers of the two or more read transducers while reading data. The read modes are selected based on an operating condition of the data storage system or device.

Abstract: In one implementation, the disclosure provides a method comprising detecting one or more areas of a storage medium having a data pattern with a plurality of consecutive bits, where the consecutive bits have the same polarity. The method further comprises encoding additional information on a section of the one or more detected areas, where the section of the one or more detected areas has a signal to noise ratio (SNR) higher than SNR of the other areas of the storage media.

Abstract: Systems and methods for multi-dimensional mapping of binary data DNA sequences are described. In one embodiment, the method may include determining a current level of a first DNA base from a sequence of DNA bases based at least in part on a read process of the sequence, determining a current level of a second DNA base after the first DNA base and a current level of a third DNA base after the second DNA base, and decoding binary data from the sequence based at least in part on the determined current level of the first DNA base, the determined current level of the second DNA base, and/or the determined current level of the third DNA base.

Abstract: A method for scanning for flaws on a magnetic recording medium is disclosed. The magnetic recording medium has a first set of nonconsecutive data tracks and a second set of nonconsecutive data tracks. The method includes writing a test pattern to only the first set of nonconsecutive data tracks of the magnetic recording medium, reading of the test pattern written to the first set of nonconsecutive data tracks, and identifying flaws within the first set of nonconsecutive data tracks and the second set of nonconsecutive data tracks based on the reading the test pattern.

Abstract: One or more detectors detect data from respective one or more analog sources operable to read from a storage medium. A buffer pool is between the decoders and two or more detectors. The decoders are simultaneously operable, via the buffer pool, to independently decode the data from the one or more detectors.

Abstract: A recording head has a first magnetic writer and a second magnetic writer offset from the first magnetic writer in a downtrack and crosstrack direction. The recording head has leads configured to deliver respective first and second write and/or laser currents to the first and second writers. The first and second write and/or laser currents enable the first and second writers to simultaneously write to adjacent tracks of a magnetic disk.

Abstract: A baseline performance of a disk drive is found based on a media speed and a bit aspect ratio of the drive. A parallelism architecture is chosen for the disk drive based on an end-use application of the drive. The parallelism architecture includes two heads capable of simultaneously accessing one or more disks of the disk drive. An increased performance of the disk drive is determined due to the parallelism architecture, and at least one of the media speed and bit aspect ratio are reduced such that a final drive performance with the parallelism architecture satisfies the baseline performance, the baseline performance being less than the increased performance. The reduction of the media speed and/or bit aspect ratio increases another capability of the drive over that of the equivalent drive.

Abstract: In a device with first and second heads, the second head is held at a radial location over one or more disks via a second actuator that moves the second head. A position error of the second head is read while performing a seek with a first actuator, the first actuator moving the first head over the one or more disks. A mechanical transfer function is determined between the first actuator and the second actuator based on the position error of the second head. The mechanical transfer function is used to provide compensation for the second head via the second actuator in response to subsequent seek of the first actuator.

Abstract: A recording head has a first magnetic writer and a second magnetic writer offset from the first magnetic writer in a downtrack and crosstrack direction. The recording head has leads configured to deliver respective first and second write and/or laser currents to the first and second writers. The first and second write and/or laser currents enable the first and second writers to simultaneously write to adjacent tracks of a magnetic disk.

Abstract: A slider includes an array of two or more transducer sets offset from one another in a cross-track direction. Each transducer set includes at least one writer and at least one reader. All of the transducer sets are configured to operate simultaneously to perform any combination of reading and writing on two or more tracks of a recording medium. At least one actuator is included between two the transducer sets. The actuator is configured to adjust a cross-track spacing between the two transducer sets in response to a control current.

Abstract: Performance data of two or more actuators of a storage device is determined. The actuators independently move respective two or more heads over one or more disks coupled to a spindle motor. The independent movement of the two or more heads causes coupling therebetween that affects tracking of the two or more heads. Based on the performance data, bit aspect ratios associated with each of the two or more heads are selected that minimize performance impacts due to the coupling.

Abstract: Two or more read modes of a data storage system and device are defined. The data storage device is capable of concurrently reading from two or more tracks using two or more read transducers. The read modes utilize different numbers of the two or more read transducers while reading data. The tread modes are selected based on an operating condition of the data storage system or device.

Abstract: A slider includes an array of two or more transducer sets offset from one another in a cross-track direction. Each transducer set includes at least one writer and at least one reader. All of the transducer sets are configured to operate simultaneously to perform any combination of reading and writing on two or more tracks of a recording medium. At least one actuator is included between two the transducer sets. The actuator is configured to adjust a cross-track spacing between the two transducer sets in response to a control current.

Abstract: Host data to be written to a recording medium is categorized as one of sequential data or random data. The sequential data is written to a first track width on the recording medium. The random data is written to a second track width on the recording medium, the second track width being larger than the first track width.