Microsoft Technology Licensing, LLC

Microsoft Corporation

Amit Singla

Abid Ali

Karandeep Singh Anand

Vijay Sen

Pankaj Khanzode

Manoj K Valiyaparambil

Vinay Badami

Sushil Baid

Vanita Prabhu

Sai Peyyeti

Seshagiri K V

Harsh Mittal

Robert M Fries

Ravisankar V Pudipeddi

Brian Thomas Berkowitz

Catharine Van Ingen

Dilip Madhusudan Ranade

Vivek Sahasranaman

Nikhil Vijay Chandhok

Sunil Pai

Charumathy Srinivasan

Arasu Shankher Jeyaprakash

Madhan Sambandam

Sachin Durge

Sriram Balasubramaniam

Vinay S Badami

Manmeet S Dhody

Arun Kumar M

Pankaj V Khanzode

Pankaj Vasant Khanzode

Bikash Kumar Agrawala

Abhinav Srivastava

Seshagiri KV

Rajsekhar Das

Embodiments are directed to efficiently backing up portions of data and to performing a scoped data recovery. In an embodiment, a computer system preloads data images with data corresponding to various different software applications or operating systems. The computer system chunks the data images, so that each data image is divided into multiple data chunks, and where each data chunk is represented by a hash value. The computer system then receives, from a user, portions of delta data representing data differences between the received user data and the data in the preloaded data images. The computer system also generates a logical backup representation that includes the data chunk hash values for the preloaded data images as well as the delta data received from the user. This logical representation allows restoration of the user's data using only the hash values and the delta data.

Efficient application-aware disaster recovery

Aspects of the subject matter described herein relate to a storage architecture. In aspects, an address provided by a data source is translated into a logical storage address of virtual storage. This logical storage address is translated into an identifier that may be used to store data on or retrieve data from a storage system. The address space of the virtual storage is divided into chunks that may be streamed to the storage system.

Storage architecture for backup application

Methods and systems are disclosed for backup using a metadata virtual hard drive (VHD) and a differential VHD. A particular system includes a memory device that stores files and a backup agent configured to detect changes to the files. The system includes a translation module configured to translate the detected changes into VHD formatted changes and a VHD module configured to write the VHD formatted changes to a metadata VHD stored at the memory device. The VHD module is also configured to generate a differential VHD based on the metadata VHD. A network interface at the system is configured to transmit the metadata VHD and the differential VHD to a remote storage device.

Backup using metadata virtual hard drive and differential virtual hard drive

A backup and restore system may present recovered backup data as local resources and in a read and write manner so that the recovered backup data may be accessed using an application that created the data. In some embodiments, the recovered data may be read only data, but a differencing virtual hard disk (VHD), Common Internet File System protocol, or differencing driver may be used to present a read/write version of the data. Additionally, the data may be presented using iSCSI or other technologies to present the data as local data, even though the data may be remotely located. The backup and restore system may additionally use VHD differencing technologies to create multiple backups.

Item level recovery

In accordance with one embodiment of the present invention, a method for efficiently inventorying a plurality of items of media contained in a library is provided. The method includes reading a barcode located on an item of media that contains contents and determining whether the barcode is known. Optionally, the method may also determine if the know item of media was previously offline. If it is determined that the barcode is known, the media is identified as known. However, if it is determined that the barcode is not known, a detailed inventory of the contents of the item of media is performed. In one embodiment, if it is determined that the barcode is not known, a user is notified that a new item of media has been identified.

Method and system for improving management of media used in archive applications

Data can be protected at a production server in a virtually continuous fashion, without necessarily imposing severe constraints on the source application(s). For example, a production server can create an application-consistent backup of one or more volumes, the backups corresponding to a first instance in time. A volume filter driver can monitor data changes in each volume using an in-memory bitmap, while a log file and/or update sequence number journal can keep track of which files have been added to or updated. The volume updates are also consistent for an instance (later) in time. At the next replication cycle, such as every few minutes (however configured), the volume filter driver passes each in-memory bitmap to the physical disk on the production server. The production server then sends the updates to the backup server, which thus stores application-consistent backups for the volume for multiple instances of time.

Creating frequent application-consistent backups efficiently

A method for verifying data copies generated by a data protection system is provided. In accordance with the method, intents for selecting a data copy to be verified are determined. The intents may specify a time period after which data is to be verified and an interval for which the verification is to be repeated. Additionally, utilizing the intents, a data copy matching those intents is identified and verified. A data copy may be verified by comparing a checksum of the data copy with a known checksum value. If the data copy fails to be verified, a copy of the data copy is generated.

Method and system for verifying data in a data protection system

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Redmond, WA, United States of America

Amit Singla