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Acronis vmProtect 6 Manual

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91 Copyright © Acronis, Inc., 2000-2011
To reduce the access time (a striped volume).
To achieve fault tolerance by introducing redundancy (mirrored and RAID-5 volumes).
When backing up virtual machines which contain dynamic disks inside, Acronis vmProtect backs up
the logical dynamic volumes instead of the entire dynamic disks structure.
E
Encrypted archive
A backup archive (p. 86) encrypted according to the Advanced Encryption Standard (AES). When the
encryption option and a password for the archive are set in the backup options (p. 86), each backup
belonging to the archive is encrypted by the agent (p. 85) before saving the backup to its destination.
The AES cryptographic algorithm operates in the Cipher-block chaining (CBC) mode and uses a
randomly generated key with a user-defined size of 128, 192 or 256 bits. The encryption key is then
encrypted with AES-256 using a SHA-256 hash of the password as a key. The password itself is not
stored anywhere on the disk or in the backup file; the password hash is used for verification
purposes. With this two-level security, the backup data is protected from any unauthorized access,
but recovering a lost password is not possible.
F
Full backup
A self-sufficient backup (p. 85) containing all data selected for backup. To recover the data from a full
backup, access to any other backup is not needed.
G
GFS (Grandfather-Father-Son)
A popular backup scheme (p. 86) aimed at maintaining the optimal balance between a backup
archive (p. 86) size and the number of recovery points (p. 92) available from the archive. GFS enables
recovering with daily resolution for the last several days, weekly resolution for the last several weeks
and monthly resolution for any time in the past.
For more information please refer to GFS backup scheme.
H
High Availability (HA)
VMWare vCenter specific feature which, in case of cluster hardware failure, allows to automatically
restart the virtual servers on another host in the cluster.
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