Abstract: Disclosed is a magnetic recording medium which enables a magnetic head to be accurately positioned even if higher-density recording of magnetic recording media is reinforced. The magnetic recording medium includes at least one servo band being magnetized in one direction and including a plurality of servo patterns being formed repeatedly along a long side of the servo band. Furthermore, each of the servo patterns includes a first magnetizing area being formed across a width of the servo band at an angle from 8 to 20 degrees with respect to the width, and a second magnetizing area being formed across the width of the servo band in non-parallel with the first magnetizing area. In addition, the first and second magnetizing areas are magnetized in a direction opposite to that of the servo band.

Abstract: A servo writer according to the present invention is a servo writer which writes a servo signal on a servo band of a magnetic tape. It comprises a magnetic tape driving system in which a magnetic tape supplied from a supply reel is taken up by a take-up reel to drive the magnetic tape; a DC erasing head which is slidably in contact with said driving tape and which DC-magnetizes said servo band with imparting an azimuth relative to said servo band; and a servo signal writing head provided on a downstream of said DC erasing head in the driving direction of the magnetic tape, which is slidably in contact with said driving tape and which magnetizes the servo band by a magnetizing force having a component with a reverse magnetizing force relative to the magnetizing force of the DC erasing head in the lengthwise direction of the magnetic tape.

Abstract: A magnetic tape is characterized in that a servo signal for performing tracking control of a magnetic head is written on a data band, data is recorded on the data band, and the servo signal is magnetized and written on the servo band magnetized in any one of direction of longitudinal directions with being magnetized in a reverse direction for the one direction.

Abstract: A magnetic head assembly to record servo signals, that serves for positioning of data recording magnetic heads and data reproducing magnetic heads, on magnetic tapes includes a servo signal recording head of which sliding surface has a magnetic gap embedded thereon in order to record the servo signals onto a magnetic tape and guide blocks which are set adjacent to at least one of the up-stream position or the down-stream position of a line of magnetic tape passing the servo signal recording head and are slightly set back from the sliding surface of the recording head so that said magnetic tape slides an edge of the servo signal recording head and an edge of the guide block.

Abstract: A servo signal inspection device and a method for detecting servo signal are provided which can measure and evaluate quality of the servo signal on a magnetic tape with a sufficient resolution. The device includes a servo signal inspecting head, a peak detecting means, a time interval measuring means and an inspection means, wherein a period T [s] of a standard clock signal used in the time interval measuring means and a running speed v [m/s] of the magnetic tape at the servo signal inspecting head satisfy the following relationship: T×v<80 nm.

Abstract: A servo writer according to the present invention is a servo writer which writes a servo signal on a servo band of a magnetic tape. It comprises a magnetic tape driving system in which a magnetic tape supplied from a supply reel is taken up by a take-up reel to drive the magnetic tape; a DC erasing head which is slidably in contact with said driving tape and which DC-magnetizes said servo band with imparting an azimuth relative to said servo band; and a servo signal writing head provided on a downstream of said DC erasing head in the driving direction of the magnetic tape, which is slidably in contact with said driving tape and which magnetizes the servo band by a magnetizing force having a component with a reverse magnetizing force relative to the magnetizing force of the DC erasing head in the lengthwise direction of the magnetic tape.

Abstract: A method for inspecting a head unit moving device is characterized by having the steps of running a inspection use tape in which a servo signal is written displaced in a width direction of a magnetic tape at a predetermined frequency and amplitude; measuring a position of a head unit practically moved in a width direction of the inspection use tape in response to the servo signal; and calculating a difference between the position and a position to be instructed so as to move the head unit in response to the servo signal, wherein the head unit moving device moves the head unit with a servo signal reading head, a data signal recording head, and a data signal reproducing head in the width direction of the magnetic tape in response to the servo signal read from the magnetic tape by the servo signal reading head.

Abstract: Data for specifying servo bands SB1 to SB5 is embedded in each servo signal S1 to S5 that is written on a plurality of servo bands SB1 to SB5 formed on a magnetic tape MT.

Abstract: A magnetic tape is characterized in that a servo signal for performing tracking control of a magnetic head is written on a data band, data is recorded on the data band, and the servo signal is magnetized and written on the servo band magnetized in any one of direction of longitudinal directions with being magnetized in a reverse direction for the one direction.

Abstract: Disclosed is a servo writer which forms servo bands on information recording media so as to enable a drive to track the servo bands with great accuracy by using a recording/reproducing head. The servo writer includes a driving mechanism for running a tape-shaped information recording medium, a servo pattern writing means for writing servo patterns on the running tape-shaped information recording medium, thereby forming servo bands thereon, and a tape edge forming mechanism for cutting evenly an edge of the running tape-shaped information recording medium, so that the edge becomes parallel to the servo bands.

Abstract: A servo writer according to the present invention is a servo writer which writes a servo signal on a servo band of a magnetic tape. It comprises a magnetic tape driving system in which a magnetic tape supplied from a supply reel is taken up by a take-up reel to drive the magnetic tape; a DC erasing head which is slidably in contact with said driving tape and which DC-magnetizes said servo band with imparting an azimuth relative to said servo band; and a servo signal writing head provided on a downstream of said DC erasing head in the driving direction of the magnetic tape, which is slidably in contact with said driving tape and which magnetizes the servo band by a magnetizing force having a component with a reverse magnetizing force relative to the magnetizing force of the DC erasing head in the lengthwise direction of the magnetic tape.

Abstract: A tape drive of the present invention records data on a tape having a plurality of servo bands, where a servo signal is recorded in advance along a longitudinal direction, and a data band containing a plurality of data tracks formed between each of the servo bands while tracking the tape, based on a servo signal: the tape drive comprises a tape running system for running the tape between two reels that can wind it; and a data recording head comprising a pair of servo read elements provided corresponding to the servo band, and data write elements provided plurally side by side between the pair of the servo read elements, wherein when recording the data, the tape drive writes a condition in recording, which is obtained by reading the servo signal with the servo read elements, in at least one of the data tracks with the data write elements.

Abstract: A servo write head assembly comprises an AC demagnetizing head that slides in contact with a magnetic tape all of which surface is magnetized in one direction of longitudinal directions thereof, and demagnetizes a data band of the magnetic tape; a servo write head that slides in contact with the magnetic tape, magnetizes a servo band of the magnetic tape in a reverse direction, and writes a servo signal; and a guide for regulating a movement in lateral directions of the magnetic tape that is running, wherein the AC demagnetizing head and the servo write head are integrally configured and the guide is provided between the AC demagnetizing head and the servo write head.

Abstract: A servo write head assembly comprises an AC demagnetizing head that slides in contact with a magnetic tape all of which surface is magnetized in one direction of longitudinal directions thereof, and demagnetizes a data band of the magnetic tape; a servo write head that slides in contact with the magnetic tape, magnetizes a servo band of the magnetic tape in a reverse direction, and writes a servo signal; and a guide for regulating a movement in lateral directions of the magnetic tape that is running, wherein the AC demagnetizing head and the servo write head are integrally configured and the guide is provided between the AC demagnetizing head and the servo write head.

Abstract: A magnetic tape is characterized in that a servo signal for performing tracking control of a magnetic head is written on a data band, data is recorded on the data band, and the servo signal is magnetized and written on the servo band magnetized in any one of direction of longitudinal directions with being magnetized in a reverse direction for the one direction.

Abstract: A servo signal inspection device and a method for detecting servo signal are provided which can measure and evaluate quality of the servo signal on a magnetic tape with a sufficient resolution. The device includes a servo signal inspecting head, a peak detecting means, a time interval measuring means and an inspection means, wherein a period T [s] of a standard clock signal used in the time interval measuring means and a running speed v [m/s] of the magnetic tape at the servo signal inspecting head satisfy the following relationship: T×v<80 nm.

Abstract: Disclosed are a magnetic tape capable of suppressing deterioration of the S/N ratio of the data and servo signals and adapted to high density recording design, and a servo writer capable of producing the above magnetic tape. Further, the magnetic tape includes a DC-magnetized DC written region, a servo signal being written onto the DC written region, and a data track. Here, the DC written region and the servo signal are formed to satisfy a relationship ?1.5×Tw?Fd?1.5×Tw, where Fd denotes a position of an end of the DC written region with respect to an end of the servo signal, and Tw denotes a width of the data track.

Abstract: A servo write head assembly comprises an AC demagnetizing head that slides in contact with a magnetic tape all of which surface is magnetized in one direction of longitudinal directions thereof, and demagnetizes a data band of the magnetic tape; a servo write head that slides in contact with the magnetic tape, magnetizes a servo band of the magnetic tape in a reverse direction, and writes a servo signal; and a guide for regulating a movement in lateral directions of the magnetic tape that is running, wherein the AC demagnetizing head and the servo write head are integrally configured and the guide is provided between the AC demagnetizing head and the servo write head.

Abstract: Disclosed is a magnetic recording medium which enables a magnetic head to be accurately positioned even if higher-density recording of magnetic recording media is reinforced. The magnetic recording medium includes at least one servo band being magnetized in one direction and including a plurality of servo patterns being formed repeatedly along a long side of the servo band. Furthermore, each of the servo patterns includes a first magnetizing area being formed across a width of the servo band at an angle from 8 to 20 degrees with respect to the width, and a second magnetizing area being formed across the width of the servo band in non-parallel with the first magnetizing area. In addition, the first and second magnetizing areas are magnetized in a direction opposite to that of the servo band.

Abstract: A tape drive of the present invention records data on a tape having a plurality of servo bands, where a servo signal is recorded in advance along a longitudinal direction, and a data band containing a plurality of data tracks formed between each of the servo bands while tracking the tape, based on a servo signal: the tape drive comprises a tape running system for running the tape between two reels that can wind it; and a data recording head comprising a pair of servo read elements provided corresponding to the servo band, and data write elements provided plurally side by side between the pair of the servo read elements, wherein when recording the data, the tape drive writes a condition in recording, which is obtained by reading the servo signal with the servo read elements, in at least one of the data tracks with the data write elements.