Hitachi Global Storage Technologies Netherlands B.v.

Shunichiroh Ohta

Masayuki Kanamaru

Naoyuki Kagami

Akira Tokizono

Toshihiko Tsunokawa

Hideki Ohzeki

Tatsuo Takagi

Kazuyuki Ishibashi

Sachiyo Baba

Yasunori Kawamoto

Embodiments of the present invention provide accurate pitch control of a servo write track. A Self-Servo-Write (SSW) according to an embodiment of the present invention determines a reference APC by reading a mark formed on the recording surface corresponding to the propagation head prior to starting the product servo pattern writing. The accurate size of the mark in the radial direction is known previously. The reference APC is for determining the track pitch, and by using the mark with the determined size, the product servo patterns can be written with a desired and accurate track pitch.

Method of writing pattern on magnetic disk and device therefor

A method and apparatus for use with a rotating storage device. The rotating storage device includes a storage medium driven to rotate, a head for reading and writing information on the storage medium and a ramped loading mechanism in which the head is stored. In accordance with the method of the present invention, the head is loaded from the ramped loading mechanism onto the storage medium. Next, determining whether or not a write operation on said storage medium is performed within a predetermined amount of time after loading said head on said storage medium and in response to said determination, setting a verification flag to indicate a data verification is required immediately after said write operation.

Control method and apparatus for reducing the effects of hard disk contamination

A slider is disposed to face a disk-like recording medium and enabled to support a read/write head. The slider has an air bearing surface formed between a leading edge and a trailing edge ; side rails and formed on the air bearing surface almost like a U-letter so as to dispose its tip at the trailing edge side ; a cross rail ; and a pair of landing pads and formed between the tip of each of the side rails and the cross rail to and the trailing edge . One of the pair of landing pads and is formed as a convex surface at its side facing the rail of the landing pad disposed at the outer periphery side of the disk-like recording medium while the slider is disposed so as to face the disk-like recording medium.

Slider, head assembly, and disk drive unit

A method and apparatus for use with a rotating storage device. The rotating storage device includes a storage medium driven to rotate, a head for reading and writing information on the storage medium and a ramped loading mechanism in which the head is stored. In accordance with the method of the present invention, the head is loaded from the ramped loading mechanism onto the storage medium. Next, location information stored in the storage medium via the head is read. A location of the head is then retained for a predetermined period above a track of a region other than a valid storage region of the storage medium after successfully reading the location information.

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Machida, Japan

Shunichiroh Ohta