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:
Jun. 09, 2015
Filed:
Nov. 21, 2014
Hgst Netherlands B.v., Amsterdam, NL;
James Bowling French, Jr., Longmont, CO (US);
HGST Netherlands B.V., Amsterdam, NL;
Abstract
Embodiments of servo systems for disk drives are described that include servo identifiers (SIDs) that can be used in mini-mode with a shortened servo gate window that skips over the initial fields in the SID. The SID embodiments include a Servo Address Mark (SAM), Track-ID (TID), P and Q PES bursts, and one or more Integrated Servo sequences that provide a Servo Track Mark (STM) that is detectable in mini-mode. The Integrated Servo sequences can also provide additional PES information, as well as, sector identification information. In one embodiment the servo pattern includes only one IS sequence (which is aligned with the P-Burst) and the Q-Burst is made longer than the P-Burst. The additional number of cycles (bits) in the Q-Burst increases the equivalent number of bits in the PES to compensate for the lack of the second IS sequence.