The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 02, 2007
Filed:
Nov. 02, 2005
Satoshi Ishii, Kanagawa, JP;
Masato Taniguchi, Kanagawa, JP;
Tetsuo Ueda, Kanagawa, JP;
Noboru Yoshida, Kanagawa, JP;
Satoshi Ishii, Kanagawa, JP;
Masato Taniguchi, Kanagawa, JP;
Tetsuo Ueda, Kanagawa, JP;
Noboru Yoshida, Kanagawa, JP;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
Embodiments of the invention perform a stable data write operation at a low operating ambient temperature and promptly perform a write command process within a magnetic recording apparatus that employs a load/unload design. In one embodiment, write heads unloaded on a ramp are completely preheated before magnetic disks reach their rated rotation speed. This preheat operation takes time T. After completion of write head preheating, the write heads are loaded from the ramp. This loading operation takes time T. Since time Tand time Tdo not sequentially elapse, it is possible to prevent a write operation from being rendered unstable by thermal protrusion while expediting a write command process.