A recording and reproducing device of the present invention includes, a case; at least one recording medium having a disk-shape, a motor configured to rotate the at least one recording medium, a head configured to read or write information from or to the at least one recording medium, and an actuator configured to drive the head to scan in a radial direction of the at least one recording medium which are provided in the case; and a regulating portion configured to, when an external shock is applied to the at least one recording medium, contact an outer peripheral edge of the at least one recording medium to regulate displacements of the at least one recording medium due to bending of the at least one recording medium, wherein the regulating portion includes a regulating member which is movable in an axial direction parallel to a rotation axis of the at least one recording medium.

According to one embodiment, a magnetic disk device includes a disk including a first region and a second region different from the first region, a head that writes data on the disk and reads data from the disk, an actuator that positions the head on the disk, and a controller which positions the head by driving the actuator and writes data in the first region and the second region with the head, a skew angle of the head with respect to a circumferential direction of the disk varying within a first angle in the first region, and varying, in the second region, from a second angle larger than the first angle to a third angle larger than the first angle and the second angle.

According to one embodiment, a magnetic disk device includes a disk including a first region and a second region different from the first region, a head that writes data on the disk and reads data from the disk, an actuator that positions the head on the disk, and a controller which positions the head by driving the actuator and writes data in the first region and the second region with the head, a skew angle of the head with respect to a circumferential direction of the disk varying within a first angle in the first region, and varying, in the second region, from a second angle larger than the first angle to a third angle larger than the first angle and the second angle.

An apparatus includes a head having at least three pairs of modules, each module having an array of transducers and at least one servo transducer. The axes of the arrays are oriented about parallel to each other. Of each pair of modules, the array of a first module is offset from the array of a second module in a direction parallel to the axis of the array of the second module. All of the transducers of each first module are positioned on a first side of an imaginary line oriented in the intended direction of tape travel, all of the transducers of each second module are positioned on a second side of the imaginary line. A first pair of modules and a third pair of modules have a same first function, and a second pair of modules has a second function, the first function and the second function are different.

An apparatus according to one embodiment includes a head having at least two modules, each of the modules having an array of transducers and at least one servo transducer. An axis of each array is defined between opposite ends thereof. The axes of the arrays are oriented about parallel to each other. The axes of the arrays are spaced from one another in an intended direction of tape travel thereacross. The array of a first of the modules is offset from the array of a second of the modules in a first direction parallel to the axis of the array of the second module. All of the transducers of the first module are positioned on a first side of an imaginary line oriented in the intended direction of tape travel, wherein all of the transducers of the second module are positioned on a second side of the imaginary line.

An apparatus according to one embodiment includes a head having at least two modules, each of the modules having an array of transducers and at least one servo transducer. An axis of each array is defined between opposite ends thereof. The axes of the arrays are oriented about parallel to each other. The axes of the arrays are spaced from one another in an intended direction of tape travel thereacross. The array of a first of the modules is offset from the array of a second of the modules in a first direction parallel to the axis of the array of the second module. All of the transducers of the first module are positioned on a first side of an imaginary line oriented in the intended direction of tape travel, wherein all of the transducers of the second module are positioned on a second side of the imaginary line.

An apparatus according to one embodiment includes a head having at least two modules, each having an array of transducers. Axes of the arrays are about parallel and are spaced from one another in an intended direction of tape travel thereacross. The array of a first of the modules is offset from the array of a second of the modules in a first direction parallel to the axis of the array of the second module such that the transducers of the first module and the transducers of the second module are positioned to fill a contiguous data band with written tracks in multiple passes. All of the transducers of the first module are positioned on a first side of an imaginary line oriented in the intended direction of tape travel, and all of the transducers of the second module are positioned on a second side of the imaginary line.

To automatically perform centering for making the center of a mounting hole of a rotating body positioned on the axial center of a rotation shaft, with the rotation shaft placed in non-contact with a peripheral edge of the mounting hole, when inserting the rotation shaft into the mounting hole.

A rotating body is held to a holding surface of a holder in a non-contact state by an action of air, and a movable shaft having the same axial center as a rotation shaft and whose leading end directly faces one end of the rotation shaft is provided as being housed in an insertion part of the holder movably in the axial direction, wherein the centering is automatically performed by making Bernoulli effect appear by the air flowing from the side of a surface opposite to a surface to be held of the rotating body toward the surface to be held through a space between an outer periphery of the movable shaft or that of the rotation shaft and a peripheral edge of the mounting hole, in a series of processes for switching from a state in which the movable shaft is inserted into the mounting hole to a state in which the rotation shaft is inserted into the mounting hole, by moving the holder in the axial direction of the rotation shaft in a state where the mounting hole is positioned on an extension line of the rotation shaft.

To automatically perform centering for making the center of a mounting hole of a rotating body positioned on the axial center of a rotation shaft, with the rotation shaft placed in non-contact with a peripheral edge of the mounting hole, when inserting the rotation shaft into the mounting hole.

A rotating body is held to a holding surface of a holder in a non-contact state by an action of air, and a movable shaft having the same axial center as a rotation shaft and whose leading end directly faces one end of the rotation shaft is provided as being housed in an insertion part of the holder movably in the axial direction, wherein the centering is automatically performed by making Bernoulli effect appear by the air flowing from the side of a surface opposite to a surface to be held of the rotating body toward the surface to be held through a space between an outer periphery of the movable shaft or that of the rotation shaft and a peripheral edge of the mounting hole, in a series of processes for switching from a state in which the movable shaft is inserted into the mounting hole to a state in which the rotation shaft is inserted into the mounting hole, by moving the holder in the axial direction of the rotation shaft in a state where the mounting hole is positioned on an extension line of the rotation shaft.

This base plate constitutes a part of a housing of a disk drive device, and is formed from a metal plate and a die-cast part. The metal plate includes a board-shaped bottom plate portion that spreads out perpendicular to an up-down extending axis of rotation of a disk. The die-cast part covers at least a part of the bottom plate portion. Metal which constitutes the bottom plate portion is higher in rigidity than metal which constitutes the die-cast part.