Method and apparatus for positioning head of disk drive using zone-bit-recording

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5257143
SERIAL NO

07641264

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A zone-bit-recording disk drive has a rotating platter with a surface which is divided into at least two zones each having a respective different number of angularly spaced sectors therein. A method and apparatus for positioning the head relative to the platter surface involve maintaining a count of the number of sectors which pass the head after the platter passes a predetermined angular orientation, ignoring the count during a time interval when the head moves out of a first of the zones toward a second of the zones which contains the specified sector and until the head has entered the second zone and the platter thereafter passes a predetermined angular orientation, and thereafter determining when the count corresponds to the specified sector to be accessed.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
NEC CORPORATIONTOKYO10463

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Zangenehpour, Saied Lincoln Township, Berrien County, MI 5 212

Cited Art Landscape

Patent Info (Count) # Cites Year
 
NEC CORPORATION (1)
* 4999720 Zone density sector counter 24 1989
 
PARADYNE CORPORATION (1)
* 4647991 Disk channel controller 3 1985
 
TEXAS INSTRUMENTS INCORPORATED (1)
* 4758944 Method for managing virtual memory to separate active and stable memory blocks 42 1984
 
Research Investment Network, Inc. (1)
* 5050013 Hard sectoring circuit and method for a rotating disk data storage device 59 1990
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
WI-LAN INC. (2)
* 5812755 Logical and physical zones for management of defects in a headerless disk drive architecture 35 1995
* 5802584 Hardware alignment in a headerless disk drive architecture 22 1995
 
WESTERN DIGITAL TECHNOLOGIES, INC. (1)
* 6023384 Data recording device and control apparatus for recording data twice on one track using different encoding methods 6 1995
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
* 5510905 Video storage server using track-pairing 43 1993
 
MEDIATEK INC. (1)
* 5388085 Apparatus and method for accessing sectors of a rotating disk 7 1993
 
PANASONIC CORPORATION (3)
* 7386222 Audio/video information recording/reproducing device and method therefor 0 2001
* 2003/0190,153 Voice/video information recording/reproducing device and method therefor 1 2003
* 8320748 Audio/video information recording/reproducing device and method therefor 0 2008
 
Mobile Storage Technology, Inc. (7)
5596458 Variable zone layout for information storage disk drive 44 1994
5946153 Information storage disk drive with variable zone layout 9 1996
5870237 Method for variable zone layout for information storage disk drive 32 1996
6260257 Method of manufacturing an information storage disk drive with variable zone layout and track pitch parameter considerations 28 1997
6091559 Variable zone layout and track pitch parameter considerations for information storage disk drive 48 1997
6005725 Variable zone layout and track pitch parameter considerations for information storage disk drive 29 1997
7342741 Disk drive with variable track density 7 2000
 
SAMSUNG ELECTRONICS CO., LTD. (1)
* 6081399 Disk drive having double heads and method for controlling head switching 6 1996
 
QLOGIC CORPORATION (3)
9201599 System and method for transmitting data in storage controllers 0 2004
8032674 System and method for controlling buffer memory overflow and underflow conditions in storage controllers 2 2004
7802026 Method and system for processing frames in storage controllers 3 2004
 
NEC CORPORATION (2)
* 5559647 Magnetic disk controller which avoids erroneous write operations to ZBR-type magnetic disks upon detection of a next sector mark from the ZBR magnetic disk 3 1995
* 5654835 Magnetic disk controller capable of avoiding erroneous write operations to ZBR-type magnetic disks 2 1995
 
National Semiconductor Corporation (1)
* 5418659 Reliable time-domain demarcation of split formats in embedded-servo, zoned-data recording disk drives 15 1993
 
RPX CORPORATION (1)
6449111 Data frame write and read processes 43 1998
 
MARVELL INTERNATIONAL LTD. (38)
* 5627695 System and method for generating unique sector identifiers for an identificationless disk format 61 1995
7492545 Method and system for automatic time base adjustment for disk drive servo controllers 2 2003
7457903 Interrupt controller for processing fast and regular interrupts 15 2003
7219182 Method and system for using an external bus controller in embedded disk controllers 10 2003
7080188 Method and system for embedded disk controllers 11 2003
7064915 Method and system for collecting servo field data from programmable devices in embedded disk controllers 9 2003
7039771 Method and system for supporting multiple external serial port devices using a serial port controller in embedded disk controllers 7 2003
7111228 System and method for performing parity checks in disk storage system 13 2003
7007114 System and method for padding data blocks and/or removing padding from data blocks in storage controllers 11 2003
7526691 System and method for using TAP controllers 1 2003
7287102 System and method for concatenating data 7 2004
7139150 Method and system for head position control in embedded disk drive controllers 3 2004
7870346 Servo controller interface module for embedded disk controllers 2 2004
7120084 Integrated memory controller 5 2004
8166217 System and method for reading and writing data using storage controllers 0 2004
7757009 Storage controllers with dynamic WWN storage modules and methods for managing data and connections between a host and a storage device 0 2004
7158058 Method and apparatus for generating a seed set in a data dependent seed selector 64 2004
7386661 Power save module for storage controllers 4 2004
7240267 System and method for conducting BIST operations 3 2004
7609468 Method and system for read gate timing control for storage controllers 3 2005
8713224 System and method for transferring data in storage controllers 0 2005
7975110 Method and system for supporting multiple external serial port devices using a serial port controller in embedded disk controllers 17 2006
7336435 Method and system for collecting servo field data from programmable devices in embedded disk controllers 1 2006
7559009 System and method for performing parity checks in disk storage systems 10 2006
7596053 Integrated memory controller 5 2006
7286441 Integrated memory controller 3 2006
7471485 Method and system for head position control in embedded disk drive controllers 3 2006
7808404 Method and apparatus for generating a seed set in a data dependent seed selector 4 2007
7853747 Method and system for using an external bus controller in embedded disk controllers 1 2007
8015448 System and method for conducting BIST operations 0 2007
7535791 Integrated memory controller 0 2007
8417900 Power save module for storage controllers 0 2008
7870320 Interrupt controller for prioritizing interrupt requests in an embedded disk controller 1 2008
8116026 Method and system for head position control in embedded disk drive controllers 0 2008
8189285 Method and system for automatic time base adjustment for disk drive servo controllers 2 2009
8023217 Method and system for read gate timing control for storage controllers 1 2009
7984252 Storage controllers with dynamic WWN storage modules and methods for managing data and connections between a host and a storage device 0 2010
8370541 Method and system for processing frames in storage controllers 0 2010
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
* 2008/0219,644 AUDIO/VIDEO INFORMATION RECORDING/REPRODUCING DEVICE AND METHOD THEREFOR 0 2008
* Cited By Examiner