Microsoft Technology Licensing, LLC

Microsoft Corporation

Ravisankar V. Pudipeddi

Vishal V. Ghotge

Ravinder S. Thind

Mark J. Zbikowski

Sarosh C. Havewala

Mark Joseph Zbikowski

Ravisankar V Pudipeddi

Vishal Vikram Ghotge

Sarosh Cyrus Havewala

Ravinder S Thind

David Allen Goebel

Robert I Ferguson

William Jefferson Westerinen

Cenk Ergan

Michael Richard Fortin

Michael James Zwilling

Brian Thomas Berkowitz

Hanumantha Rao Kodavalla

Nathan Steven Obr

John M Parchem

Clark David Nicholson

Patrick L Stemen

Rajeev Y Nagar

Therron Powell

Dean L DeWhitt

Surenda Verma

Dan Teodosiu

David T Jones

Emily Nicole Hill

Martin J O'Riordan

Benjamin A Leis

Brian D Andrew

Norbert Paul Kusters

Neal Robert Christiansen

Surendra Verma

Bryan M Willman

Thomas Jay Miller

Kyle G Peltonen

David Golds

Brian Kenneth Dewey

Wesley Allan Witt

Eileen C Brown

Jon Cargille

Revinder S Thind

Rajen J Shah

Edward K Y Jung

Luis Felipe Cabrera

William R Tipton

Praerit Garg

James Ernest Johnson

Srikanth Shoroff

Emily Nicole Wilson

Klaus U Schutz

Dexter Paul Bradshaw

Jianrong Gu

Lonny Dean McMichael

James G Letwin

Gary D Kimura

Alan R Whitney

Muhunthan Sivapragasam

Bartosz Boleslaw Milewski

Daniel W H Chan

Steven J Malan

Daniel Teodosiu

Mike K Lai

J Gordon Letwin

Andrew G Held

David P Golds

Sarosh C Havewala

Vishal V Ghotge

Dean L Dewhitt

Vishal A Ghotge

Neal Christiansen

Ravisankar Pudipeddi

An extensible file system format for portable storage media is provided. The extensible file system format includes the specification of primary and secondary directory entry types that may be custom defined. The primary and secondary directory entry types can be further classified as critical and benign directory entries. The directory entry types can define whether a cluster chain corresponding to a file can be contiguously allocated.

Extending cluster allocations in an extensible file system

An extensible file system format for portable storage media is provided. The extensible file system format includes the specification of primary and secondary directory entry types that may be custom defined. The primary and secondary directory entry types can be further classified as critical and benign directory entries.

Extensible file system

In order to provide a more efficient persistent storage device, one or more long-term storage media are included along with a non-volatile memory. In one embodiment, one portion of the non-volatile memory is used as a write buffer and a read cache for writes and reads to the long-term storage media. Interfaces are provided for controlling the use of the non-volatile memory as a write buffer and a read cache. Additionally, a portion of the non-volatile memory is used to provide a direct mapping for specified sectors of the long-term storage media. Descriptive data regarding the persistent storage device is stored in another portion of the non-volatile memory.

Non-volatile memory cache performance improvement

A method for establishing and maintaining a differential snapshot of a set of files stored on a volume is disclosed. The invention achieves processing time and disk space optimizations by avoiding copy-on-write operations for logically insignificant moves of blocks, such as the block rearrangements characteristic of defragmentation utilities. A file system enhancement enabling the passing of a block copy command from the file system to lower-level drivers, is used to inform the snapshotter that a block move operation is not logically meaningful. When the logically insignificant move is of a block whose data forms part of the data captured in the snapshot virtual volume, and when the move is to a block location that is functioning as logical free space, the snapshotter can simply modify its block bitmap and update translation table entries without needing to perform a copy-on-write.

Optimizing defragmentation operations in a differential snapshotter

Growing community of inventors

Woodinville, WA, United States of America

Mark Joseph Zbikowski