Acronis International Gmbh

Acronis Inc.

Maxim V Goldobin

Serguei M Beloussov

Maxim V Lyadvinsky

Dmitry Chepel

Alexander G Tormasov

Yuri Per

Andrey A Zorin

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for efficient backup using hashes One of the methods includes forming an image of a storage device, wherein contents of blocks of the storage device are restorable from the contents of blocks of the image. The method includes generating a first plurality of hash values, each hash value generated from contents of a block of the image. The method includes selecting a block of the storage device. The method includes generating a hash value from the contents of the selected block. The method includes determining whether the hash value occurs in the plurality of hash values. The method also includes generating an entry in the image in response to the determination.

System and method for efficient backup using hashes

A system for data backup and recovery. A backup storage in a form of a file or a directory is created on a storage media. The backup storage is 'hidden' from the file system, form user processes, form an operating system and from a data storage driver. The backup file is visible to only backup/restore application. The data is backed up into the 'hidden' backup storage. The files system, the user processes, the operating system and the data storage driver do not know about the backup file and the areas of the storage media occupied by the backup file. When a write request for writing a data block to the space within the storage media occupied by the files of the &#x201c;hidden&#x201d; backup is received the write request is redirected to a free space on the storage media.

Method and system for backup to a hidden backup storage

A system, method and computer program product for providing 'bare metal' computer hardware with full operating system capabilities, including: (a) executing software contained in computer hardware read-only memory; (b) transferring software control to a location of a start-up program; (c) performing initialization of devices of the computer hardware; (d) selecting an origin storage device for restoration of an operating system to a destination storage device of the computer hardware; (e) establishing a connection with an origin for restoration of an operating system to the computer hardware; (f) initiating a transfer of the operating system data from selected origin to the computer hardware; (g) performing optional substitution of the computer hardware drivers; (h) performing optional structural modifications to the restored operating system; and (i) restoring the operating system to the computer hardware from a data storage device located either locally or remotely, from full or incremental operating system backup.

System and method for bare metal restore of a computer over a network

A method for data backup including (a) forming an image of the storage device; (b) for each block to be backed up to the image, generating a hash; (c) for each block stored in the image, storing a hash in a hash table; (c) for each additional block of the storage device to be backed up, generating a hash; (d) sorting all the generated hashes and deleting duplicate hashes; (e) comparing the hashes to identify candidate blocks that might have identical contents with contents of blocks stored in the image; (f) if the hashes are not coincident, then backing up, to the image, contents of unidentified blocks and blocks that do not have identical hashes, and (g) otherwise, storing links in the image instead of the contents of the blocks, (h) after checking all the hashes for those blocks that need to be backed up, writing only unique hashes to the hash table; (h) links for multiple blocks with identical contents point to a single block in the image, (i) the image contains a bitmap of the backup; (j) the bitmap contains indicators for the links that define if a block contains the content or if the block points to another block, (k) also indicators that reflect used and unused blocks such that an indicator whether contents are shared with another block vs. contents are unique to every other block in the image.

A system for continuous data protection includes a storage device and a backup storage device. The continuous data protection procedure is performed as two parallel processes: creating an initial backup by copying a data as a file/directory from the storage device into the backup storage device, and copying the data to be written to the data storage as a part of a file/directory into the incremental backup. When a write command is directed to a file system driver, it is intercepted and redirected to the backup storage, and the data to be written in accordance with the write request, is written to the incremental backup on the backup storage. If the write command is also directed to a data (a file/directory) that has been identified for backup, but has not yet been backed up, the identified data (a file/directory) is copied from the storage device to the intermediate storage device. Then, the write command is executed on the identified file/directory on the storage device and the file/directory is copied from the intermediate storage device.

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Moscow, Russia

Maxim V Goldobin