Disk drive returning dummy data to a host when reading an...

Details Disk drive returning dummy data to a host when reading an... Disk drive returning dummy data to a host when reading an...

Filed on

2009-02-25

Date issued

2010-12-14

Examiner

Sniezek, Andrew L (Department: 2627)

Patent Class

Dynamic magnetic information storage or retrieval

SubClass

Automatic control of a recorder mechanism

SubSubClass

Controlling the head

Other Related Categories

C711S111000, C711S165000, C360S053000, C360S051000, C360S031000, C360S055000

Type

Reexamination Certificate

Status

active

Patent number

07852596

Description

ABSTRACT:
A disk drive is disclosed comprising a disk and a head actuated over the disk. The disk comprises a plurality of tracks, wherein each track comprises a plurality of data sectors. A read command is received from a host to read data from a target data sector. When it is determined that the target data sector has not been written by the host, dummy data is returned to the host.

REFERENCES:
patent: 5664096 (1997-09-01), Ichinomiya et al.
patent: 5729396 (1998-03-01), Dudley et al.
patent: 6970310 (2005-11-01), Kawaguchi et al.
patent: 7062398 (2006-06-01), Rothberg
patent: 2002/0036850 (2002-03-01), Lenny et al.
patent: 2007/0079098 (2007-04-01), Kitamura
patent: 2010/0017577 (2010-01-01), Fujimoto et al.
U.S. Appl. No. 12/118,365 to Chun Sei Tsai, et al., filed May 9, 2008, 18 pages.

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