A magnetic recording medium is a tape-shaped magnetic recording medium, including: a substrate; an underlayer provided on the substrate; and a magnetic layer provided on the underlayer. The substrate contains polyester, each of the underlayer and the magnetic layer contains a lubricant, the magnetic layer has a surface on which a large number of holes is provided, the arithmetic average roughness Ra of the surface is 2.5 nm or less, a BET specific surface area of the entire magnetic recording medium measured in a state where the magnetic recording medium has been washed and dried is 3.5 m.sup.2/g or more and 7.0 m.sup.2/g or less, a squareness ratio of the magnetic layer in a vertical direction is 65% or more, an average thickness of the magnetic layer is 80 nm or less, an average thickness of the magnetic recording medium is 5.6 μm or less, and a servo pattern is recorded on the magnetic layer and a statistical value δ.sub.SW indicating a non-linearity of the servo pattern is 24 nm or less.

A computer-implemented method for altering a current position in a Data Partition of a tape at which the tape transitions to a DATA_FULL state is disclosed. The computer-implemented method includes determining a size of a last Index appended to the Data Partition of the tape. The computer-implemented method further includes altering, based on the size of the last Index appended to the Data Partition of the tape, the current position in the Data Partition of the tape at which the tape transitions to DATA_FULL state to a new position in the DATA Partition of the tape at which the tape transitions to the DATA_FULL state, wherein the DATA_FULL state is a state on the tape in which only metadata write operations are permitted in the Data Partition.

A cartridge is provided and includes tape-shaped magnetic recording medium; and cartridge memory; wherein cartridge memory includes communication unit that communicates with recording/reproducing device in state where cartridge is loaded on recording/reproducing device; storage unit; and control unit that stores, reads, and transmits information, wherein information includes manufacturing information of cartridge and adjustment information for adjusting a tension applied to the tape-shaped magnetic recording medium in a longitudinal direction of tape-shaped magnetic recording medium thereof, tape-shaped magnetic recording medium has a plurality of servo bands, and wherein a temperature expansion coefficient α of the tape-shaped magnetic recording medium satisfies 6 ppm/° C.≤α≤8 ppm/° C.

[Object] To provide a technology capable of further improving the recording density of data.

[Solving Means] A magnetic recording medium according to the present technology is a tape-shaped magnetic recording medium including: a base material; and a magnetic layer, the tape-shaped magnetic recording medium being long in a longitudinal direction and short in a width direction, in which the magnetic layer includes a data band long in the longitudinal direction and a servo band long in the longitudinal direction, a data signal being written to the data band, a servo signal being written to the servo band, 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 data signal is 185 nm or less, a thickness of the magnetic layer is 90 nm or less, and a thickness of the base material is 4.2 μm or less.

The present disclosure provides where a magnetic recording medium is provided and includes a base; an underlayer that is provided over the base and includes a non-magnetic powder; and a magnetic layer that is provided over the underlayer and includes a magnetic powder and a binder, wherein an average particle volume V of the magnetic powder is 1600 nm.sup.3 or less, an average thickness of the magnetic recording medium is 5.3 μm or less, a thermal stability K.sub.uV.sub.act/k.sub.BT of the magnetic recording medium is 63 or more, and a ratio Hrp/Hc1 of a residual coercive force Hrp of the magnetic recording medium measured using a pulsed magnetic field in a perpendicular direction to a coercive force Hc1 of the magnetic recording medium in the perpendicular direction is 1.98 or less.

A computer-implemented method to detect a damaged tunneling magnetoresistance (TMR) sensor includes applying current at at least two different current values to the TMR sensor and measuring a resistance, R.sub.TMR, at each current value. The method also includes measuring a slope in resistance vs. bias current, RD.sub.SLP, using the measured resistances R.sub.TMR and the at least two different current values. The method includes calculating a ΔRD.sub.SLP value as a difference between the RD.sub.SLP value and an expected value, RD.sub.SLP-expected, for the TMR sensor. The method includes determining whether the ΔRD.sub.SLP value is within a predefined range. In response to determining that the ΔRD.sub.SLP value is outside the predefined range, the method includes outputting an indication that the TMR sensor fails. In response to determining that the ΔRD.sub.SLP value is within the predefined range, the method includes outputting an indication that the TMR sensor passes.

A recording device includes a first derivation unit that derives relevance of positions between different virtual blocks on a recording medium, a second derivation unit that derives inter-data relevance representing a possibility that plural items of data to be recorded on the recording medium are read out in parallel, a third derivation unit that uses a difference between the relevance of the positions and the inter-data relevance to derive a block for recording each of the plural items of data, and a control unit that performs control of recording the plural items of data on the recording medium according to the block derived by the third derivation unit for each of the plural items of data.

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.

The magnetic recording medium includes a non-magnetic support; a non-magnetic layer which contains a non-magnetic powder and is provided on the non-magnetic support; and a magnetic layer which contains a ferromagnetic powder and is provided on the non-magnetic layer, in which a thickness of the non-magnetic layer is less than 0.7 μm, and an average 5-point peak height Rpm is 30 nm or lower and the number of projections having a height of 5 nm or higher is 5,000 or more, as obtained by using an atomic force microscope in a measurement region of 90 μm square on a surface of the magnetic layer.

An apparatus according to one approach includes an array of skew detection transducers. An array of write transducers is spaced from the array of skew detection transducers along an intended direction of tape travel thereacross. An array of read transducers is aligned with the array of write transducers in the intended direction of tape travel. The apparatus also includes a first actuator configured to operatively exert a force on the array of skew detection transducers for orienting a longitudinal axis of the array of skew detection transducers substantially orthogonal to the actual direction of tape travel across the array of skew detection transducers. A magnetic recording medium according to one approach includes a magnetic recording tape having a longitudinal axis extending between distal ends thereof, the magnetic recording tape having vertical bars written in servo-skew patterns thereof, the vertical bars being oriented perpendicular to the longitudinal axis of the tape.