Abstract: A method for making a magnetic recording tape, in accordance with one approach, includes coupling an underlayer to a substrate, the substrate comprising a poly ether ether ketone (PEEK). A method for making a magnetic recording tape in accordance with another approach includes coupling an underlayer to a substrate via radiation-induced grafting, the substrate comprising a poly ether ether ketone (PEEK). A recording layer is coupled to the underlayer.

Abstract: An approach for improving the tape storage media by optimizing tape drives in a tape library. Embodiments manage, by a web interface provided by a tape library, an inventory of one or more tape drives and the one or more tape media in the tape library, and record high tension discharge and distance measurement after formatting in a cartridge memory of the one or more tape media in the tape library. Further, embodiments manage the high tension discharge and the distance measurement after formatting in the cartridge memory of the one or more tape media by measuring a distance between servo bands utilizing one or more unused tape drives and one or more low frequency tape drives in the tape library, and execute a rewind at low tension using the one or more unused tape drive and the one or more low frequency tape drives.

Abstract: A magnetic recording medium according to the present technology includes: a base material; and a magnetic layer, in which the magnetic recording medium has a tape shape that is long in a longitudinal direction and short in a width direction, the magnetic layer includes a data band and a servo band, a data signal being written to the data band, the data band being long in the longitudinal direction, a servo signal being written to the servo data, the servo band being long in the longitudinal direction, the degree of perpendicular orientation of the magnetic layer being 65% or more, a full width at half maximum of an isolated waveform in a reproduced waveform of the servo signal is 195 nm or less, the magnetic layer has a thickness of 90 nm or less, and the base material has a thickness of 4.2 ?m or less.

Abstract: A data storage device is disclosed comprising at least one head configured to access a magnetic tape. User data is written to a first area of the magnetic tape at a first data track pitch, and when a distortion of the magnetic tape is detected, the user data is rewritten to compensate for the distortion.

Abstract: An external servo writer configured to write a plurality of embedded servo sectors on a magnetic tape to define a plurality of data tracks is disclosed. A first part of the plurality of embedded servo sectors is written while controlling an actuator to first move a head vertically along a width of the magnetic tape. A second part of the plurality of embedded servo sectors is written while controlling the actuator to second move the head vertically along the width of the magnetic tape.

Abstract: According to one embodiment, a magnetic disk device includes a disk having a first area, and a second area to which data is temporary written, a head including a write head which writes data to the disk, and an assisting element which generates energy which improves write performance of the write head, and a controller which writes data to the first area by supplying energy having a first value to the assisting element, and writes data to the second area by supplying energy having a second value different from the first value to the assisting element.

Abstract: Techniques for determining a maximum permissible media deposition temperature for depositing one or more layers over a substrate of a heat assisted magnetic recording (HAMR) platform. In one aspect, a method includes controlling a thermomechanical analyzer to measure the mechanical expansion of a glass material versus temperature within a temperature range that is below the primary transformation temperature (Tg) of the glass material to detect a possible initial transformation that occurs within the glass material at a temperature (Tt) below the primary transformation temperature (Tg). If such an initial transformation is detected, the maximum deposition temperature is set based on the initial transformation temperature (Tt), rather than on the primary transformation temperature (Tg). Otherwise, the maximum permissible media deposition temperature is set based on the transformation temperature (Tg).

Abstract: A disk drive apparatus determines a pattern of bits of a data signal applied to a magnetic write transducer of a heat-assisted magnetic recording apparatus. The magnetic write transducer applies a magnetic field to a recording medium in response to the data signal. A laser power signal is applied to a laser that heats the recording medium while the magnetic field is applied. The laser power signal is modulated based on the pattern of bits. The modulation reduces differences between track widths of recorded marks having different elapsed time values and/or increases a signal-to-noise ratio of the recorded marks having different elapsed time values.

Abstract: A data storage rack may only have a subset of the HDDs therein operating in an active mode where read/write operations may be performed. Other HDDs may operate in an idle mode, which is a power-saving state that permits the HDDs to quickly change-over to the active mode, when needed. In storage racks containing numerous HDDs, a majority of the HDDs may be operated at idle mode for a majority of the time. Where a large number of HDDs are operated at idle mode, a fixed common idle speed shared by the numerous HDDs can cause unwanted excitation, vibration, and resonance. This can yield increased wear on rack components, decreased performance from the HDDs therein, and increased noise. Variable HDD idle spindle speeds mitigate the foregoing, which is caused by an idle spindle speed previously common to many, if not all HDDs within the data storage rack.

Abstract: A heat-assisted magnetic recording (HAMR) head has a gas-bearing slider that supports a a main magnetic pole, a near-field transducer (NFT) and a waveguide optically coupled to the NFT. Optically reflective side shields are located adjacent the cross-track sides of the waveguide at the slider's gas-bearing surface (GBS). The side shields may also be located adjacent the cross-track sides of the NFT and extend in the along-the-track direction to the write head's magnetic return pole. The cross-track gap width between a portion of the side shields adjacent the NFT at the GBS may be different from the cross-track gap width between a portion of the side shields adjacent the waveguide end at the GBS.

Abstract: A magnetic recording cartridge is provided and including a magnetic recording medium, wherein an average thickness of the magnetic recording medium tT is 3.5 ?m?tT?5.6 ?m, a dimensional change amount ?w in a width direction of the magnetic recording medium with respect to a tension change in a longitudinal direction of the magnetic recording medium is 700 ppm/N??w?20000 ppm, the magnetic recording medium is accommodated in a state of being wound around the reel in the cartridge case and (a servo track width on an inner side of winding of the magnetic recording medium)?(a servo track width on an outer side of winding of the magnetic recording medium)>0 is satisfied, and a squareness ratio measured in a vertical direction of the magnetic recording medium is 65% or more.

Abstract: Disclosed is a device for recording information on a magnetic data storage medium which comprises a magnetic field source designed to be capable of generating a magnetic field in the region where the magnetic data storage medium is arranged; a source of electromagnetic radiation at a matrix of controllable mirrors; and a matrix of controllable mirrors mounted in a housing so as to be capable of reflecting electromagnetic radiation by means of the controllable mirrors into the region where the magnetic data storage medium is arranged and/or in another direction. The present invention makes it possible to record information on a fixed magnetic data storage medium.

Abstract: To provide a servo signal verifying device for verifying a servo signal of a magnetic recording tape with high recording density. The present technology provides a servo signal verifying device including: at least one servo signal reading head that reads a servo signal written to a servo band of a magnetic recording tape; a first amplifier that amplifies the servo signal read by the servo signal reading head; and a second amplifier that includes a low-pass filter with a cutoff frequency of 35 MHz or less and amplifies a signal amplified by the first amplifier. Further, the present technology provides also a servo writer that includes the servo signal verifying device, and a method of producing a magnetic recording tape using the servo signal verifying device. Further, the present technology provides also a servo signal reading head constituting the servo signal verifying device.

Abstract: A recording head includes a channel waveguide that delivers light to a media-facing surface. A near-field transducer (NFT) is at an end of the channel waveguide and proximate to the media-facing surface. A laser including an active region has a longitudinal axis corresponding to a propagation direction of the channel waveguide. The active region includes a back facet and a front facet proximate the NFT. The front facet has a surface shape configured to suppress back reflection of the light.

Abstract: A recording head has a waveguide that delivers optical energy from an energy source and a write pole extending to a media-facing surface of the recording head. The recording head also has a near-field transducer coupled to receive the optical energy from the waveguide and emit surface plasmons from the media-facing surface towards a recording medium while the write pole applies a magnetic field to the recording medium. The near-field transducer has an extended portion that, as-manufactured, protrudes beyond the media-facing surface by a first distance.

Abstract: A servo writer includes a writing head that writes a servo signal on a long magnetic tape that is traveling and at least two first guide rollers that guide the travel of the magnetic tape, in which the at least two first guide rollers on which a spiral groove is provided have a circumferential surface that has contact with the traveling magnetic tape, tensile forces act on the magnetic tape from the at least two first guide rollers in a width direction of the traveling magnetic tape, and the tensile forces that act on the magnetic tape from the at least two first guide rollers cancel each other.

Abstract: A recording head includes one or more transducer elements, and an electrically insulative layer encasing the one or more transducer elements. The recording head also includes a substrate below the electrically insulative layer. The recording head further includes a heat sinking layer between the electrically insulative layer and the substrate.

Abstract: A Perpendicular Magnetic Recording (PMR) head is configured for use in Thermally Assisted Magnetic Recording (TAMR). Two or three contiguous write shields, of various widths and thicknesses, formed on a leading edge side of the write gap (WG), main pole (MP) and near-field transducer (NFT), protect the head during write touchdowns (TD) and signal the approach of such a touchdown. Moreover during a write touchdown the contact with the head is restricted to the large write shields, producing a large touchdown area (TDA) and insuring the lifetime of the head.

Abstract: A magnetic tape device (100) includes: a winding reel (101) winding a magnetic tape (201); a drive head (103) performing writing information onto the magnetic tape (201) and/or reading the information recorded on the magnetic tape (201); an image sensor (104) picking up an image of a surface of the magnetic tape (201); and a control unit (105) performing image processing on the image picked up the image sensor (104) and determining presence/absence of an abnormality on the surface of the magnetic tape (201), in which the control unit (105) adjusts, in accordance with at least either one of a type of the drive head (103) and a recording density of the magnetic tape (201), a winding speed at which the magnetic tape (201) is wound by the winding reel (101) when the image sensor (104) picks up the image of the surface of the magnetic tape (201).

Abstract: Embodiments of the present disclosure generally relate to a write head for a magnetic recording device. The write head includes a spin torque oscillator (STO) that has a seed layer formed on a write pole, a spin polarization layer (SPL) formed on the seed layer, a first spacer layer formed on the SPL, a field generation layer (FGL) formed on the first spacer layer, a second spacer layer formed on the FGL, and a notch formed on the second spacer layer. The FGL and the notch are antiferromagnetically coupled through the second spacer layer and thus increases the FGL angle and improves the write capabilities of the write head.