Robert M Solomon

US Patent:

6507890, Jan 14, 2003

Filed:

Sep 29, 2000

Appl. No.:

09/676222

Inventors:

Steve Morley - Upton MA
Robert C. Solomon - Kensington NH
David DesRoches - Methuen MA
John Percy - Cumberland RI

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 1200

US Classification:

711114

Abstract:

A system and method for expanding a log structure in a disk array, the disk array being expanded from M-width to N-width, the disk array including a storage level, the log structure including one or more sequential used segments, the one or more sequential used segments including live data, locates one or more sequential used segments, writes live data from the one or more located segments to the storage level, enlarges the size of the one or more located segments from M-width to N-width, and places the one or more enlarged segments on a first free segment list.

US Patent:

6611852, Aug 26, 2003

Filed:

Sep 29, 2000

Appl. No.:

09/675420

Inventors:

Steve Morley - Upton MA
Robert C. Solomon - Kensington NH
David DesRoches - Methuen MA
John Percy - Cumberland RI

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 1200

US Classification:

707206, 707205

Abstract:

A system and method for cleaning a log structure, the log structure including one or more segments, each segment including live data, orders the one or more segments into a hot list according to age, with the youngest segment at the beginning of the hot list and the oldest segment at the end of the hot list, the youngest segment being the most recently used segment and the oldest segment being the least recently used segment, pushes one or more of the oldest segments in the hot list to a cleaning matrix, the cleaning matrix grouping segments according to age and percent of live data in the segment, traverses the cleaning matrix looking for a segment, determines whether enough live data has been found to write a complete segment, sequentially repeats the previous two processes until enough live data has been found to write a complete segment, reads data from the one or more found segments, and writes the read live data into an unused segment.

US Patent:

6801960, Oct 5, 2004

Filed:

Sep 28, 2000

Appl. No.:

09/670933

Inventors:

George M. Ericson - Shrewsbury MA
Robert C. Solomon - Kensington NH
Jeffrey A. Brown - Shrewsbury MA

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 1300

US Classification:

710 33, 710 30, 713160, 713190

Abstract:

There is disclosed apparatus and methodology for enhancing computer system data transfer when writing to network attached storage systems employing FC-2 fibrechannel protocol by dynamically reconfiguring a fibrechannel switch in response to map/unmap command controls issued by a disk drive aggregator. The reconfiguration involves fabrication of a dynamic map table having sets of fibrechannel FC-2 header fields and their corresponding new or proxy destination IDs (which correspond to the switchs output ports), and fabrication of both an input frame header buffer for temporary storage purposes and a frame header field selector (which can be a frame header mask) containing only relevant information. The input frame header is temporarily stored in the buffer and the field selector is used to obtain a âdistilledâ input header which is compared with the dynamic map table of stored header fields to obtain a match. If one of the sets of header fields matches the distilled input header, its corresponding proxy destination or source ID is substituted into the corresponding FC-2 input frame headers destination ID field, whereby write command data transfers are accomplished between host computer and a particular disk drive directly, avoiding the aggregator and latency otherwise introduced by the aggregator.

US Patent:

6865650, Mar 8, 2005

Filed:

Sep 29, 2000

Appl. No.:

09/675423

Inventors:

Steve Morley - Upton MA, US
Robert C. Solomon - Kensington NH, US
David DesRoches - Methuen MA, US
John Percy - Cumberland RI, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F012/00

US Classification:

711138, 711112, 711113, 711114, 711117, 711122, 711139

Abstract:

A system and method for storing data, the system having one or more storage devices, caches data from a sender into a first random-access structure located in a first cache level, caches data from the first cache level into a log structure located in a second cache level, and stores data from CL into a second random-access structure located in a storage level, wherein CL is the first cache level or the second cache level. In further embodiments of the invention, the second cache level caches in the log structure parity data for the data cached in the log structure. In a still further embodiment of the invention, the storage level stores in the second random-access structure parity data for the data stored in the second random-access structure.

US Patent:

7386666, Jun 10, 2008

Filed:

Sep 30, 2005

Appl. No.:

11/241166

Inventors:

Robert Beauchamp - Framingham MA, US
Robert Solomon - Kensington NH, US
Jeffrey A. Brown - Shrewsbury MA, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 12/00

US Classification:

711114

Abstract:

High availability is provided in a multi-array storage system at the logical storage unit level. One or more storage arrays export logical storage units (LUNs). Each storage array maps the LUNs to physical groups of disks or disk partitions within the array. A controller coupled to the storage arrays arranges the LUNs from all the arrays so that one or more LUN(s) are designated as spare LUN(s). If a disk failure occurs within any disk in any array, the contents of one or more of the LUN(s) associated with the group of disks containing the failed disk are re-established on the spare LUN(s). If the physical groups of disks are RAID protected, then after affected LUNs are moved, the storage array containing the failed disk removes the failed disk from its group and re-establishes RAID protection across the remaining disks in the group.

US Patent:

8452924, May 28, 2013

Filed:

Jun 19, 2009

Appl. No.:

12/488170

Inventors:

Roy E. Clark - Hopkinton MA, US
Robert C. Solomon - Kensington NH, US
Robert W. Beauchamp - Littleton MA, US
Humberto Rodriguez - Williamsburg MA, US
John M. Hayden - Holliston MA, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 12/00

US Classification:

711118, 711104, 711135

Abstract:

A method, computer program product, and cache management system for receiving an indication of a data portion update within an electromechanical storage system. Information concerning the data portion update is provided to at least one proprietary, solid-state, non-volatile, cache memory system. The proprietary, solid-state, non-volatile, cache memory system is associated with at least a first of a plurality of computing devices and is not associated with at least a second of the plurality of computing devices.

US Patent:

8627138, Jan 7, 2014

Filed:

Mar 26, 2010

Appl. No.:

12/732330

Inventors:

Roy E. Clark - Hopkinton MA, US
Robert C. Solomon - Kensington NH, US

Assignee:

EMC Corporation - Hopkinton MA

International Classification:

G06F 11/00

US Classification:

714 44, 714 631

Abstract:

A system, computer-implemented method, and a computer program product for monitoring a first data portion written to a first storage device accessible by a first computing device. At least a second data portion written to at least a second storage device accessible by at least a second computing device is monitored. Recovery data is written to a recovery storage device external to and accessible by the first and the at least a second computing devices, wherein the recovery data is based, at least in part, upon the first and second data portions.

US Patent:

20100163471, Jul 1, 2010

Filed:

Dec 30, 2008

Appl. No.:

12/345856

Inventors:

Irving Elyanow - Lexington MA, US
John Herbert - Marlborough MA, US
Robert Lee Solomon - Seattle WA, US
Nishith Vora - Bensalem PA, US
Lanny D. Weimer - Ellicott City MD, US

International Classification:

C02F 9/10
C02F 9/08
C02F 9/04
C02F 103/08

US Classification:

210176, 210260, 210258, 210202

Abstract:

The present invention discloses a desalination plant that operates with a sea water or brackish water feed and produces a concentrated and selectively improved salt reject stream and a pure water permeate stream from a first treatment section that is arranged to produce primarily water at high recovery using membrane desalination processes. The reject stream from the first treatment line has a component distribution that is substantially reduced in native di- and polyvalent scaling ions, essentially depleted of sulfate, has substantially higher total dissolved solids than a traditional sea water reverse osmosis reject, yet is suitable for thermal treatment processes. The system may be enhanced by monovalent salt components. The unit may be integrated with a second treatment section, in which the first reject stream is further concentrated, purified, and processed to produce a high purity salt product.