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:
Mar. 27, 2001
Filed:
Jan. 27, 1999
Serge Shats, Palo Alto, CA (US);
Iouri Bagachev, Sunnyvale, CA (US);
Luong-Duc Bui, Milpitas, CA (US);
Quantum Corp., Milpitas, CA (US);
Abstract
A method of data transfer in a cache system comprising a cache buffer including a plurality of data blocks for storing data, and a cache manager for retrieving data from a disk drive and storing the data into the cache buffer. The disk drive includes a data disk having a plurality of concentric data tracks thereon, a spindle motor for rotating the data disk, and a transducer supported by a carrier for positioning the transducer over individual data tracks to write data thereto or read data therefrom. In one embodiment, a method of data transfer in response to a request for retrieving a set of data blocks from the selected track, comprises the steps of: (a) defining a data segment on the selected track, wherein the data segment comprises, in sequence, a pre-fetch data area, a fetch data area comprising said set of data blocks, and a post-fetch data area; (b) determining a landing position of the transducer over the selected track relative to the data segment; and (c) controlling transfer of data from the data segment to the cache buffer based on said landing position relative to the data segment in maximize the data read from the data segment without increasing rotational latency.