Seagate Technology Incorporated

Jp Morgan Chase Bank

Robert Dale Murphy

John Edward Moon

Robert William Dixon

Lealon Ray McKenzie

Thomas Dale Hosman

Mehmet Fatih Erden

Karl Arnold Belser

Walter Richard Eppler

Lawrence Matthias Bryant

Michael Edward Baum

Greg D Larrew

David Charles Waugh

Michael Habinsky

David A Hitch

Steven Scott Williams

Stanton MacDonough Keeler

Randall D Hampshire

Stephen R Genheimer

Paul Francis Kusbel

Alan A Fennema

Margot Ann LaPanse

Todd Ray Strope

Clyde Everett Goodner, Iii

Daniel Scott Fisher

Rodney Brittner

Stephen Matthew Gaub

John Wehman

Glen Douglas Worstell

Rod Brittner

Peter Murray

Mark A Hickl

Margot A Lapanse

Preston Donald Sellers

Joseph Masaki Baum

Gabor Sz&iuml;ta

Daniel Zaharris

An edge node has a central processing operable to gather sensor node data via a sensor and store at least part of the sensor node data locally in a public region of a persistent storage. The edge node backs up duplicate portions of the sensor node data to public storage regions of peer-edge nodes. The edge node receives private data from a host that is coupled to the edge computing node and the peer edge nodes, and stores the private data in a private region of the persistent storage. The private region is protected from the peer edge nodes using distributed key management.

Sensor nodes and host forming a tiered ecosystem that uses public and private data for duplication

One or more networks each include a plurality of sensor nodes operable to communicate public data with each other. Each of the plurality of sensor nodes is operable to gather sensor node data and store the sensor node data locally on the sensor node. Duplicate portions of the sensor node data are distributed to the public data of others of the plurality of sensor nodes via the public data paths for backup storage. The system includes a host that is coupled to individually communicate private data with each of the plurality of sensor nodes. Each of the sensor nodes protects the private data from others of the sensor nodes using distributed key management to ensure distributed encryption.

Apparatuses, systems, and methods for implementing fast resume from hibernate are disclosed. In one embodiment, an apparatus can include a data storage device having a circuit configured to determine a first memory location of hibernation data without receiving an indication of the first memory location from the host, and store the hibernation data to a second memory location of the DSD.

Fast resume from hibernate

A data storage area of a data storage device can be used to communicate information between the data storage device and an external device or software. In some examples, configuration data stored within the data storage area can be used to determine a subset of data to copy or move from a first data storage medium to a second data storage medium. The data storage area can be a unique partition and the data storage device can locate partition information to determine a location of the partition. The data storage device can then use the partition to store data for two-way communication between the data storage device and an external system, device, or software.

Direct hinting for a memory device

In a particular embodiment, a system includes a controller adapted to determine a data transfer rate associated with at least one data stream to be written to a storage media and to selectively activate at least one of a first memory and a second memory based on the data transfer rate to record the at least one data stream.

Storage device and controller to selectively activate a storage media

Systems and methods are disclosed for cache data value tracking. In an embodiment, a controller may be configured to select data; set a node weight for the data representing a cache hit potential for the data; store a first time stamp value for the data representing when the data was accessed; and store the data in a cache memory based on the node weight and the first time stamp value. In another embodiment, a method may comprise setting a node weight for data associated with a data access command, storing a first access counter value for the data representing a number of times new data has been stored to the cache memory when the data was accessed, and removing the data from the cache memory or maintaining the data in the cache memory based on the node weight and the first access counter value.

Cache data value tracking

The disclosure is related systems and method for improved boot and resume from hibernate times in hybrid drives. In one embodiment, a device may comprise an interface circuit to communicate with a host device, a first nonvolatile data storage medium, and a controller configured to monitor the interface circuit for a trigger event and pin data associated with read requests to the first nonvolatile data storage medium during a first specific duration in response to the trigger event. Another embodiment may be a method comprising receiving a trigger event, monitoring a duration since the trigger event, retrieving data from a nonvolatile cache memory, retrieving data from a disc memory when the data is not in the nonvolatile cache memory, and pinning the data retrieved from the disc memory to the nonvolatile cache memory.

Fast boot in hybrid drives

The disclosure is related to data storage systems having multiple cache and to management of cache activity in data storage systems having multiple cache. In a particular embodiment, a data storage device includes a volatile memory having a first read cache and a first write cache, a non-volatile memory having a second read cache and a second write cache and a controller coupled to the volatile memory and the non-volatile memory. The memory can be configured to selectively transfer read data from the first read cache to the second read cache based on a least recently used indicator of the read data and selectively transfer write data from the first write cache to the second write cache based on a least recently written indicator of the write data.

Systems and methods of tiered caching

A disc drive with an information portion previously written on a rotatable disc surface, a servo write clock generator phase lock loop circuit controlling timing for writing a reference mark to the rotatable disc surface in substantial time alignment and phase and frequency coherent with the information portion previously written to the rotatable disc surface, a servo write clock generator phase lock loop circuit controlling timing for writing the reference mark, a pulse detector circuit for creating logic level signals from the reference mark, a pattern generator for generating reference mark write signals from the logic level signals, a memory buffer for storing radial position correction tables and values for writing the reference mark, and a self-servo control and sequencing circuit synchronizing timing signals for writing the reference mark to rotatable disc surface of disc drive.

Self-writing servo and clock fields on a recording medium

A method and apparatus for reading and writing data from and to a data storage disc in a data storage device. The data storage disc includes a first disc surface and second disc surface for storing data. The data storage device includes an actuator assembly configured to selectively position a first transducer over the first disc surface and a second transducer over the second disc surface, wherein the first transducer is substantially identical to the second transducer. Furthermore, each transducer includes a read element and a write element, wherein the read element is offset from the write element by at least the width of one servo track.

Servo writing in a disc drive with substantially identical heads having read and write elements in a radial offset position

A method and system of identifying and compensating for the cumulative effect of once per revolution, OPR, timing errors by modulating the size of an inter-sector runout (ISR) field between servo sectors. The ISR field is part of an inter-sector gap (ISG) field. The method begins when the nominal data field frequency is increased by one-half of the spin speed tolerance to guarantee adequate data field tolerances at the fastest portion of the timing OPR error curve. The ISR field is added to the disc format and maintained as a rotationally varying field. The ISR field is varied rotationally from a minimum of zero to a maximum equal to the timing OPR error tolerance. The size of the ISR field is varied rotationally based upon a calibration table that is used to identify the location of the disc drive head and to compensate for the appropriate timing OPR error at that location. The remainder of the ISG field is used to compensate for fixed timing errors.

Variable format timing runout compensation

A method for adapting a control system governing the swing of an actuator arm to the actual deceleration capacity of an attached servomechanism, comprising: maximally accelerating the actuator arm; measuring the actual acceleration; calculating the ratio between the actual acceleration and nominal acceleration; multiplying an actual distance parameter by the ratio before indexing into a velocity profile to retrieve a target velocity; and multiplying a feedforward signal by the ratio prior to feeding it into a control loop. The apparatus includes a servomechanism that swings the actuator arm; a transducer that produces a signal representing the arm's position; a ROM containing a velocity profile; a microprocessor connected to the transducer and ROM, controlling the velocity of the actuator arm such that it tracks retrieved target velocities by outputting a control signal, and a power amplifier connected to the microprocessor and servomechanism, for receiving the control signal and driving the servomechanism.

Continuously adaptive seek deceleration profiling

A digital phase detector that conducts pump up and pump down control signals to a charge pump, wherein each of the control signals has pulses that have a substantially 50/50 duty cycle characteristic when the two input signals, i.e., the input data signal and the feedback clock signal, are substantially in phase. This substantially 50/50 duty cycle output reduces, if not eliminates, inherent problems related to the turn-on delays of the charge pump while maintaining a locked condition. The phase detector may further include an intelligence to detect and handle other situations, such as missing data pulses.

Phase frequency detector circuit having reduced dead band

A method for minimizing once per revolution (OPT) positional errors in a single disk servo track writer (STW) comprises clamping a disc in the servo track writer; spinning the disc at a predetermined speed; determining an average OPR positional error; and adjusting a reference position for writing servo tracks on the disc to include the average OPR positional error. The apparatus includes a distance measuring device positioned adjacent the disc in the STW. Another method for reducing the effects of OPR positional error in a disc drive comprises positioning a disc on a drive motor spindle in a disc drive during assembly of the drive; spinning the disc at a predetermined speed; determining the position of maximum peak to peak OPR position error, and then readjusting the position of the disc on the spindle to minimize the error. The apparatus for this method includes a controller, a distance sensor, and a positioner for nudging the disc to an optimum position on the disc drive spindle.

Growing community of inventors

Boulder, CO, United States of America

Robert Dale Murphy