In the magnetic recording and reproducing device, a distal end width of the first magnetic pole in the recording element is substantially the same as a distal end width of the second magnetic pole; the reproducing element width of the reproducing element is equal to or less than 0.8 μm; and in the magnetic recording medium, a number distribution A of equivalent circle diameters of a plurality of bright areas 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, and a number distribution B of equivalent circle diameters of a plurality of dark areas in a binarized image of a secondary electron image obtained by imaging the surface of the magnetic layer with a scanning electron microscope at an acceleration voltage of 2 kV satisfy predetermined number distribution, respectively.

An information processing device (10) includes at least one processor. The processor divides data with a certain size or larger, which is specified on the basis of a read-out history, into a plurality of pieces of partial data, and performs control to distribute and record the plurality of pieces of partial data with respect to a plurality of magnetic tapes, respectively.

The present disclosure is generally related to a tape drive including a tape head configured to read shingled data tracks on a tape. The tape head comprises a first module head assembly aligned with a second module head assembly. Both the first and second module head assemblies comprises one or more servo heads and a plurality of data heads. Each data head comprises a write head, a first read head aligned with the write head, and a second read head offset from the first read head in both a cross-track direction and a down-track direction. The first read heads and the second read heads are configured to read data from a shingled data track of the tape simultaneously. In some embodiments, the tape head is able to be dynamically tilted in order to tilt the first and second reads heads when reading curved portions of shingled data tracks.

The present disclosure generally relates to a tape head and a tape drive including a tape head. The tape head comprises a first same gap verify (SGV) head assembly comprising a first media facing surface (MFS) and a plurality of first write transducer and first read transducer pairs, and a second SGV head assembly comprising a second MFS and a plurality of second write transducer and second read transducer pairs. During operation, when a tape or magnetic media moves in a first direction over the tape head, the tape contacts the second MFS and is spaced from the first MFS, and when the tape moves in a second direction opposite the first direction over the tape head, the tape contacts the first MFS and is spaced from the second MFS. As such, the tape contacts only one edge of either the first or second MFS during operation.

The disclosed embodiments generally relate to a data storage device for accessing a magnetic tape. The device includes write heads writing data tracks on the magnetic tape and control circuitry configured to: (1) use the heads to write a first set of data tracks on the magnetic tape; (2) measure a distortion of the first set of data tracks after the first set of data tracks have been written; and (3) use the heads to shingle write a second set of data tracks relative to the first set of data tracks based on the measured distortion. To compensate for the distortion, a priority servo is chosen based on whether the distortion is an expansion or contraction, and/or whether the shingle writing direction is inbound or outbound. The head bar is moved during shingle writing toward the servo track associated with the priority servo.

A magnetic recording medium includes a layer structure including a magnetic layer, a base layer, and a back layer in this order, in which an average thickness t.sub.T is t.sub.T≤5.5 μm, a dimensional variation Δw in a width direction to tension change in a longitudinal direction is 660 ppm/N≤Δw, and a surface roughness R.sub.abe of the base layer on a side of the back layer is 4.2 nm≤R.sub.abe≤8.5 nm.

Techniques to transmit encoded data along a physical medium, e.g. tape, and decode the transmitted data along the physical medium are provided. Some techniques include logic to encode data transmitted along a physical medium, such as a tape suitable for any purpose including the encoding of multimedia data, where the encoding is pursuant to a conversion between a first and second colorspace. The logic may further be configured to decode the data once it is received at a node along the tape, where the colorspace conversion provides the basis, key, or cipher for preforming the decoding operation. The logic may be further configured to alter the encryption and decryption basis, key, or cypher by altering the colorspace scheme defining the encoding (and by extension the decoding) during transmission, including a transmission that takes place after a previous transmission governed by the previously defined (and subsequently altered) colorspace conversion scheme. Other embodiments are described and claimed.

An information processing device performs control to record deletion information indicating that an object with a designated object ID has been deleted, on a recording medium, in a case where a specific object ID is designated and an instruction to delete the object is input, for a magnetic tape on which an object that includes data and metadata related to the data and that is assigned an object ID as identification information is recorded, the object being assigned an object ID in a case where the object is updated different from an object ID of the object before the update.

The magnetic tape includes a non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic support, in which the magnetic layer has a timing-based servo pattern, a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 1.8 nm, and an isoelectric point of a surface zeta potential of the magnetic layer is equal to or greater than 5.5.

The magnetic tape includes a non-magnetic support; a non-magnetic layer including a non-magnetic powder and a binding agent on the non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic layer, in which a total thickness of the non-magnetic layer and the magnetic layer is equal to or smaller than 0.60 μm, the magnetic layer has a servo pattern, and an isoelectric point of a surface zeta potential of the magnetic layer is equal to or greater than 5.5.