Microsoft Technology Licensing, LLC

Mathew John

Dustin Lyle Green

John Andrew Starks

Senthil Rajaram

Todd William Harris

Neal Robert Christiansen

Karan Mehra

Chung Lang Dai

Eric P Traut

Christopher Warner McCarron

Kevin Michael Broas

Allen Marshall

Meher P Malakapalli

Christopher Warner Mccarron

This document describes techniques for storing virtual disk payload data. In an exemplary configuration, each virtual disk extent can be associated with state information that indicates whether the virtual disk extent is described by a virtual disk file. Under certain conditions the space used to describe a virtual disk extent can be reclaimed and state information can be used to determine how read and/or write operations directed to the virtual disk extent are handled. In addition to the foregoing, other techniques are described in the claims, figures, and detailed description of this document.

Virtual disk storage techniques

Techniques for a recovery environment for a virtual machine are described herein. Generally, a recovery environment provides a secure environment in which a damaged virtual machine can undergo repair procedures without compromising the security of the damaged virtual machine. In at least some implementations, a recovery environment represents an instance of a virtual machine that is executed to wrap a damaged virtual machine to enable the damaged virtual machine to be repaired.

Recovery environment for a virtual machine

In an exemplary embodiment, a virtual disk file can be assigned an identifier and a virtual disk files that is dependent on the virtual disk file can include a copy of the identifier. In the instance that the virtual disk file is opened and data is modified that causes the contents of a virtual disk extent to change the identifier can be changed. If the virtual disk file and the dependent virtual disk file are used to instantiate a virtual disk the difference between identifiers can be detected, which is indicative of the fact that the virtual disk may be corrupted. Other techniques are described in the detailed description, claims, and figures that form a part of this document.

Detecting and preventing virtual disk storage linkage faults

A secure remote assistance session between computers that are behind firewalls and/or NAT devices is provided by an arrangement that uses a terminal services ('TS') gateway to enable utilization of a remote desktop protocol ('RDP') connection by a terminal services client in a reverse direction to that used in a conventional terminal services session. The connection is made via a regular TS gateway protocol mechanism by which the TS client behind a firewall establishes a connection to the remote server that is typically behind a firewall that protects a corporate network. The server then functions as the terminal services client to tunnel RDP data through the established TS gateway connection through the NAT firewall to a client. Thus, the server and client reverse roles after the TS gateway connection is made to thereby enable remote viewing of the graphical user interface that is displayed by the client in support of the remote assistance session.

Enabling secure remote assistance using a terminal services gateway

This document describes techniques for effecting a virtual disk. In an exemplary configuration, a virtual disk file can be associated with a log that acts as both a log and a check point record. When a log entry is generated, information that identifies the tail can be stored therein. This information can be used in the event that virtual disk file is improperly closed, i.e., a crash or power failure occurs, to discover a sequence of log entries to replay. In addition to the foregoing, other techniques are described in the claims, detailed description, and figures.

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Redmond, WA, United States of America

Mathew John