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disk  information recording  information  light beam  light  magnetic disk  magnetic  optical  read  recording  region magnetic  unit 
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OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE

Thu, 03 Nov 2016 08:00:00 EDT

A light information recording/reproducing apparatus can improve the optical efficiency of an optical system at the time of reproduction to thereby improve the reproduction transfer rate. An optical element (for example, an optical isolator), which removes a return light beam of a light beam, is arranged such that the light beam passes through the optical element at the time of recording information in an optical information recording medium and such that the light beam does not pass through the optical element at the time of reproducing information from the optical information recording medium.



STORAGE APPARATUS, CONTROLLER AND CONTROL METHOD

Thu, 03 Nov 2016 08:00:00 EDT

A storage apparatus of an embodiment includes a magnetic disk, a head, and a controller. The head includes a writing unit that outputs a magnetic field to record write data into a recording region of the magnetic disk to which light is irradiated and a reading unit that reads read data from the recording region of the magnetic disk. Based on a first spectrum of first read data read by the reading unit at a first position of the magnetic disk and a second spectrum of second read data read by the reading unit at a second position which is a following position of the first position, the controller detects whether an offset of the writing unit occurs while writing into the recording region of the magnetic disk is performed by the writing unit.



GRAMOPHONE RECORD

Thu, 03 Nov 2016 08:00:00 EDT

A gramophone record of the present disclosure includes a recording member 3 and a functional member 2. The recording member 3 has a main body 31 that is made of a polymeric material and that defines a receiving area 30 in a center thereof, and at least a groove 32 formed on the main body 31. The functional member 2 is disposed in the receiving area 30 and is made of a material having a density greater than a density of the polymeric material of the main body 31.