Abstract: The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. In a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions having an equivalent circle diameter of 60 nm or more and less than 120 nm is 8000 or more and 30000 or less. Standard deviation ? of the number of the bright regions in a width direction of the surface of the magnetic layer is 2000 or less.

Abstract: The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. The number of recesses existing on a surface of the magnetic layer and having an equivalent circle diameter of 0.15 ?m or more and 0.25 ?m or less is 100 or more and 2500 or less per an area of 40 ?m×40 ?m. Standard deviation ? of the number of the recesses in a width direction of the surface of the magnetic layer is 100 or less.

Abstract: The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. In a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions having an equivalent circle diameter of 60 nm or more and less than 120 nm is 8000 or more and 30000 or less. Standard deviation ? of the number of the bright regions in a width direction of the surface of the magnetic layer is 2000 or less.

Abstract: The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. In a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions having an equivalent circle diameter of 60 nm or more and less than 120 nm is 8000 or more and 30000 or less. Standard deviation ? of the number of the bright regions in a width direction of the surface of the magnetic layer is 2000 or less.

Abstract: The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. The number of recesses existing on a surface of the magnetic layer and having an equivalent circle diameter of 0.15 ?m or more and 0.25 ?m or less is 100 or more and 2500 or less per an area of 40 ?m×40 ?m. Standard deviation ? of the number of the recesses in a width direction of the surface of the magnetic layer is 100 or less.

Abstract: The magnetic tape container includes a core around which a magnetic tape is wound. The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder, and the roundness of the trajectory of one rotation drawn by the magnetic tape in a case where the wound magnetic tape is pulled out from the core is 100 ?m or less as the arithmetic mean of the measured values at three points in the width direction of the magnetic tape.

Abstract: The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which a non-linear component of a signal phase difference generated by storage for 10 days in an environment of a temperature of 60° C. and a relative humidity of 20% is 17.5 nm or less. A magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape.

Abstract: The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, and a magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. In a binarized image of a secondary electron image obtained by imaging a surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions having an equivalent circle diameter of 60 nm or more and less than 120 nm is 8000 or more and 30000 or less. Standard deviation ? of the number of the bright regions in a width direction of the surface of the magnetic layer is 2000 or less.

Abstract: The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which a non-linear component of tape width deformation generated by storage for 10 days in an environment of a temperature of 60° C. and a relative humidity of 20% is 100 nm or less. A magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape.

Abstract: The magnetic tape container includes a core around which a magnetic tape is wound. The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. A maximum value of a deviation of a center position of an average minimum region reference circle of a trajectory of one rotation drawn by the magnetic tape, in a case where the wound magnetic tape is drawn out from the core core is 100 ?m or less for three points of the magnetic tape in a width direction.

Abstract: The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. A dimension change amount ?w in a width direction with respect to a tension change in a longitudinal direction is 400 ppm/N to 900 ppm/N, the magnetic layer includes a plurality of servo bands, and a coefficient of variation CV calculated by Equation A: CV=(?G/?w)×100 is 10% or less. The ?G is a standard deviation of servo band intervals measured in a region of the magnetic tape over 100 m in the longitudinal direction with a tension of 0.6 N in the longitudinal direction. A magnetic tape container containing the magnetic tape.

Abstract: Provided are a magnetic tape control system that executes pre-rewinding storage of storing a magnetic tape in a state of being wound around a reel, and post-rewinding storage of storing the magnetic tape in a state of being rewound around a reel different from or the same reel as the reel after the pre-rewinding storage such that an end that is a tape outside end during the pre-rewinding storage is turned into a tape inside end and an end that is a tape inside end during the pre-rewinding storage is turned into a tape outside end, and a magnetic tape control device including a rewinding control unit that transmits rewinding execution information, and a drive unit that receives the rewinding execution information and starts running of a magnetic tape stored in a state of being wound around a reel to execute rewinding of the magnetic tape.

Abstract: Provided is a magnetic recording and reproducing device including, in a sealed space in the magnetic recording and reproducing device: a magnetic tape; and a magnetic head are provided, in which a relative humidity difference (RHC-RHB) between a relative humidity RHB in the sealed space measured in an environment of a temperature of 21° C. and a relative humidity of 50% and a relative humidity RHC in the sealed space measured in an environment of a temperature of 60° C. and a relative humidity of 5% is within ±10%.

Abstract: Provided is a magnetic tape device including: a magnetic head having a magnetic element that acts on a magnetic layer formed on a front surface of a magnetic tape; and a position adjusting actuator that adjusts a position of the magnetic element in a normal direction of the front surface by moving the magnetic head; and a processor that controls an operation of the position adjusting actuator.

Abstract: A magnetic tape in which a minimum value of TDStens among five TDStens measured respectively at a temperature of 16° C. and a relative humidity of 20%, a temperature of 16° C. and a relative humidity of 80%, a temperature of 26° C. and a relative humidity of 80%, a temperature of 32° C. and a relative humidity of 20% and a temperature of 32° C. and a relative humidity of 55% is 1.43 ?m/N or more, a ratio of a change of TDStens to a change of a relative humidity obtained from the five TDStens is 0.005 ?m/N/% or less, and a ratio of a change of TDStens to a change of a temperature obtained from the five TDStens is 0.020 ?m/N/° C. or less.

Abstract: The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. A dimension change amount ?w in a width direction with respect to a tension change in a longitudinal direction is 400 ppm/N to 900 ppm/N, the magnetic layer includes a plurality of servo bands, and a coefficient of variation CV calculated by Equation A: CV=(?G/?w)×100 is 10% or less. The ?G is a standard deviation of servo band intervals measured in a region of the magnetic tape over 100 m in the longitudinal direction with a tension of 0.6 N in the longitudinal direction. A magnetic tape container containing the magnetic tape.

Abstract: The magnetic tape container includes a core around which a magnetic tape is wound. The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. A maximum value of a deviation of a center position of an average minimum region reference circle of a trajectory of one rotation drawn by the magnetic tape, in a case where the wound magnetic tape is drawn out from the core core is 100 ?m or less for three points of the magnetic tape in a width direction.

Abstract: The magnetic tape container includes a core around which a magnetic tape is wound. The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder, and the roundness of the trajectory of one rotation drawn by the magnetic tape in a case where the wound magnetic tape is pulled out from the core is 100 ?m or less as the arithmetic mean of the measured values at three points in the width direction of the magnetic tape.

Abstract: The magnetic tape satisfies TDSage+TDSenv?TC?0.30 ?m. TDSage is a maximum absolute value of a difference between the servo band interval obtained before a predetermined storage and the servo band interval obtained after the storage, TDSenv is a value calculated by multiplying a difference between a maximum value and a minimum value of the servo band interval respectively obtained under five predetermined environments by ½, TC is a value calculated by multiplying TDStens by 0.5 N, and TDStens is a ratio of a change in the servo band interval to a change in tension calculated from the servo band interval respectively obtained under five predetermined environments by applying a plurality of different tensions in the longitudinal direction of the magnetic tape.

Abstract: A magnetic tape device, a magnetic tape, and a magnetic tape cartridge, in which the magnetic tape is caused to run between a winding reel and a cartridge reel in a state where a tension is applied in a longitudinal direction of the magnetic tape and a maximum value of the tension is 0.50 N or more, the magnetic tape after running in a state where the tension is applied is wound around the cartridge reel by applying a tension of 0.40 N or less in the longitudinal direction, and a center line average roughness Ra measured regarding a surface of a back coating layer of the magnetic tape with an atomic force microscope is in a range of 5 to 13 nm.