A recording and reproducing device includes: a first acquisition unit which acquires servo band interval information representing an interval, in a width direction of a magnetic tape, between adjacent servo recording elements of plural servo recording elements which record the servo patterns on the plural servo bands, respectively; a second acquisition unit which acquires reproducing element interval information representing an interval in the width direction between respective servo reproducing elements which read the adjacent servo patterns along the width direction with respect to the plural tape drives; and a selection unit which selects a tape drive into which the magnetic tape is inserted, from the plural tape drives, using a value representing a difference between the interval represented by the servo band interval information and the interval represented by the reproducing element interval information.

A recording tape cartridge storage case includes a case body made of resin having a bottom plate that is rectangular in a bottom view and a peripheral wall erected from a peripheral edge of the bottom plate, a plurality of recording tape cartridges being stored in at least two rows with label areas thereof directed upward, respectively, and a bottom rib interposed between mutually adjacent side surfaces of the recording tape cartridges that form the rows being formed on the bottom plate; and a lid member made of resin that is attached to an upper end of the peripheral wall, seals the case body, and has a top rib interposed between the side surfaces, transmission parts that are transparent flat surfaces being formed in portions that face the label areas on both sides of the top rib.

A recording tape cartridge storage case includes a case body made of resin having a bottom plate that is rectangular in a bottom view and a peripheral wall erected from a peripheral edge of the bottom plate, a plurality of recording tape cartridges being stored in at least two rows with label areas thereof directed upward, respectively, and a bottom rib interposed between mutually adjacent side surfaces of the recording tape cartridges that form the rows being formed on the bottom plate; and a lid member made of resin that is attached to an upper end of the peripheral wall, seals the case body, and has a top rib interposed between the side surfaces, transmission parts that are transparent flat surfaces being formed in portions that face the label areas on both sides of the top rib.

[Object] A cartridge memory according to an embodiment of the present technology is a cartridge memory for a recording medium cartridge, including: a memory unit; and a capacity setting unit. The memory unit has a memory capacity capable of storing management information relating to a second information recording medium configured to be capable of recording information with a second data track number larger than a first data track number. The capacity setting unit is configured to be capable of setting a data storage area limited to a first capacity capable of storing management information relating to a first information recording medium configured to be capable of recording information with the first data track number.

[Object] A cartridge memory according to an embodiment of the present technology is a cartridge memory for a recording medium cartridge, including: a memory unit; and a capacity setting unit. The memory unit has a memory capacity capable of storing management information relating to a second information recording medium configured to be capable of recording information with a second data track number larger than a first data track number. The capacity setting unit is configured to be capable of setting a data storage area limited to a first capacity capable of storing management information relating to a first information recording medium configured to be capable of recording information with the first data track number.

Described are enclosures that include a friction stir weld, including electronic device enclosures, and precursors thereof, that contain a base and a cover that in an assembled condition form a joint at which a friction stir weld can be produced, as well as methods for producing a friction stir weld at a joint of such an assembly.

A recording tape cartridge storage case includes a case body made of resin having a bottom plate that is rectangular in a bottom view and a peripheral wall erected from a peripheral edge of the bottom plate, and storing a plurality of recording tape cartridges with label areas thereof directed upward, respectively, and a lid member made of resin that is attached to an upper end of the peripheral wall, seals the case body, and has transmission parts that are transparent flat surfaces being in contact with at least a peripheral part of the label area and being formed closer to the bottom plate than a support part that supports another case body stacked thereon is, on a portion facing the label area.

Techniques provide for a storage drive carrier. The carrier may include a body configured to receive a storage drive, the body having a first length in a first direction, a second length in a second direction, and a third length in a third direction. The third length is below the first length, the first length is below the second length, and the first direction, the second direction, and the third direction are perpendicular to one another. The storage drive carrier may further include a protrusion configured to receive a first circuit board for transmitting data, the protrusion being arranged together with the body in the third direction. The protrusion is positioned within an area delimited by a center line of a face of the body on which the protrusion is provided and sides of the face, the center line bisecting the face and being parallel with the second direction.

Techniques provide for a storage drive carrier. The carrier may include a body configured to receive a storage drive, the body having a first length in a first direction, a second length in a second direction, and a third length in a third direction. The third length is below the first length, the first length is below the second length, and the first direction, the second direction, and the third direction are perpendicular to one another. The storage drive carrier may further include a protrusion configured to receive a first circuit board for transmitting data, the protrusion being arranged together with the body in the third direction. The protrusion is positioned within an area delimited by a center line of a face of the body on which the protrusion is provided and sides of the face, the center line bisecting the face and being parallel with the second direction.

A tool-less quick assembly and disassembly device for a hard disk module, including a mounting rack, a hard disk accommodation cavity being provided on the mounting rack, a multilayer hard disk support structure being provided on the mounting rack inside the hard disk accommodation cavity, and a baffle being provided on the mounting rack at a position corresponding to each layer of the hard disk support structure, the baffle being provided at the end part of one end of the mounting rack, and the other end of the mounting rack being an opening end; elastic positioning mechanisms are provided on both sides of the mounting rack; elastic clamping mechanisms are provided at the bottom of the mounting rack. The invention can enable multiple hard disks to be completely assembled and disassembled without tools, has a simple structure, is easy to assemble and disassemble.