Robert H Lester
Accountancy at Cree Dr, Colorado Springs, CO
License number
Colorado 536
Issued Date
May 27, 1952
Renew Date
May 16, 1986
Expiration Date
May 16, 1986
Type
Certified Public Accountant
Address
Address
1162 Cree Dr, Colorado Springs, CO 80915
Professional information
Request Priority Seek Manager
US Patent:
2009000, Jan 1, 2009
Filed:
Jun 29, 2007
Appl. No.:
11/771505
Inventors:
Clark Edward Lubbers - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Assignee:
SEAGATE TECHNOLOGY LLC - Scotts Valley CA
International Classification:
G06F 12/00
US Classification:
711114, 711E12001
Abstract:
As apparatus and associated method for a dual active-active array storage system with a first controller with top level control of a first memory space and a second controller with top level control of a second memory space different than the first memory space. A seek manager residing in only one of the controllers defines individual command profiles derived from a combined list of data transfer requests from both controllers. A policy engine continuously collects qualitative information about a network load to both controllers to dynamically characterize the load, and governs the seek manager to continuously correlate each command profile in relation to the load characterization.
Host Adaptive Seek Technique Environment
US Patent:
7870335, Jan 11, 2011
Filed:
Jun 26, 2007
Appl. No.:
11/768850
Inventors:
Clark Edward Lubbers - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G06F 12/00
US Classification:
711114, 711113, 711E12001, 709224
Abstract:
A data storage system and associated method implement a HASTE with a policy engine that continuously collects qualitative information about a network load to the data storage system in order to dynamically characterize the load, and continuously correlates a command profile to a data storage device of the data storage system in relation to the characterization.
Failure Trend Detection And Correction In A Data Storage Array
US Patent:
2006020, Sep 7, 2006
Filed:
Mar 3, 2005
Appl. No.:
11/070942
Inventors:
Robert Gittins - Woodland Park CO, US
Robert Lester - Colorado Springs CO, US
Robert Lester - Colorado Springs CO, US
International Classification:
G11C 29/00
US Classification:
714763000
Abstract:
Method and apparatus for detecting and correcting parametric failure trends in a data storage array. A plurality of data storage devices, such as hard disc drives, are arranged to form a multi-device addressable memory array space. A controller controls access to the array space, and is configured to accumulate operational performance data from each of the devices into a history log. A statistical analysis engine of the controller analyzes the data to detect anomalous operation of the devices, including a horizontal analysis of data across multiple devices. The controller initiates a data storage device specific corrective action event in response to the analysis, as required. The analysis by the engine can be in addition to, or in lieu of, analysis by the individual devices. A data request block requests additional data samples for a given parameter, or requests additional parametric data to further the analysis.
Failure Trend Detection And Correction In A Data Storage Array
US Patent:
7765437, Jul 27, 2010
Filed:
Oct 4, 2007
Appl. No.:
11/867543
Inventors:
Robert Sherwood Gittins - Woodland Park CO, US
Robert Michael Lester - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G06F 11/00
US Classification:
714 47
Abstract:
A plurality of data storage devices are arranged to form a multi-device array space, and a controller controls access to the array space. The controller is configured to index sets of operational performance data from the plurality of data storage devices into a unified data log. The controller further detects a failure trend of one or more data storage devices by analyzing at least one of a vertical block of data and a horizontal block of data in the unified data log. The vertical data block of data is associated with one of the data storage devices at a plurality of indices. The horizontal block of data is associated with a plurality of the data storage devices at an index.
Command Queue Management Of Back Watered Requests
US Patent:
7840751, Nov 23, 2010
Filed:
Jun 29, 2007
Appl. No.:
11/771595
Inventors:
Clark Edward Lubbers - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G06F 13/18
US Classification:
711112, 711158, 711E12072, 711E12075, 710 39, 710 40, 710 52, 710 74
Abstract:
Apparatus and method for command queue management of back watered requests. A selected request is released from a command queue, and further release of requests from the queue is interrupted when a total number of subsequently completed requests reaches a predetermined threshold.
Preferred Zone Scheduling
US Patent:
2009000, Jan 1, 2009
Filed:
Jun 29, 2007
Appl. No.:
11/771980
Inventors:
Clark Edward Lubbers - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Assignee:
SEAGATE TECHNOLOGY LLC - Scotts Valley CA
International Classification:
G06F 12/02
US Classification:
711114, 711E12005
Abstract:
A data storage system and associated method are provided wherein a policy engine continuously collects qualitative information about a network load to the data storage system in order to dynamically characterize the load and continuously correlates the load characterization to the content of a command queue of transfer requests for writeback commands and host read commands, selectively limiting the content with respect to writeback commands to only those transfer requests for writeback data that are selected on a physical zone basis of a plurality of predefined physical zones of a storage media.
Skip List With Address Related Table Structure
US Patent:
7831624, Nov 9, 2010
Filed:
Jun 24, 2005
Appl. No.:
11/166901
Inventors:
Clark Edward Lubbers - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G06F 7/00
US Classification:
707796
Abstract:
Apparatus and method for efficiently arranging and searching data in a memory space, such as a cache memory of a data storage array controller. A data structure comprises a skip list of nodes having an array of forward pointers. Each node has a node level derived from an index at which the node is stored in a table in the memory space. The total available number of nodes is preferably selected to be less than half of the largest power of 2 that can be expressed by a number of bits of the index, and the nodes are preferably stored at only even or only odd indices of the table. In such case, a free list of nodes is preferably generated from an array of pairs of counts and indices to identify the available nodes. Additional table structures can further be provided to enhance data arrangement and searching functions.
Command Queue Loading
US Patent:
7797487, Sep 14, 2010
Filed:
Jun 26, 2007
Appl. No.:
11/768849
Inventors:
Clark Edward Lubbers - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Robert Michael Lester - Colorado Springs CO, US
Assignee:
Seagate Technology LLC - Scotts Valley CA
International Classification:
G06F 12/00
US Classification:
711113, 709224
Abstract:
A data storage system and associated method are provided wherein a policy engine continuously collects qualitative information about a network load to the data storage system in order to dynamically characterize the load and continuously correlates the load characterization to a command queue depth of data transfer requests.