120 Copyright © Acronis International GmbH, 2002-2012
Deduplication in Acronis vmProtect 8 is managing data within only one backup archive. For example
if the backups are saved into 2 different archives (even if they are in the same location) then there
will be no relations between these archives and they may contain duplicated data.
Differential backup
A differential backup stores changes to the data against the latest full backup (p. 122). You need
access to the corresponding full backup to recover the data from a differential backup.
Direct management
Any management operation that is performed on the Agent (p. 116) using the console (p. 119)-agent
(p. 116) connection.
Disk group
A number of dynamic disks (p. 121) that store the common configuration data in their Logical Disk
Manager (LDM) databases and therefore can be managed as a whole. Normally, all dynamic disks
created within the same machine are members of the same disk group.
As soon as the first dynamic disk is created by the LDM or another disk management tool, the disk
group name can be found in the registry key
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\dmio\Boot Info\Primary Disk
Group\Name.
The next created or imported disks are added to the same disk group. The group exists until there is
at least one of its members. Once the last dynamic disk is disconnected or converted to basic, the
group is discontinued, though its name is kept in the above registry key. In case a dynamic disk is
created or connected again, a disk group with an incremental name is created.
When moved to another machine, a disk group is considered as ‘foreign’ and cannot be used until
imported into the existing disk group. The import updates the configuration data on both the local
and the foreign disks so that they form a single entity. A foreign group is imported as is (will have the
original name) if no disk group exists on the machine.
For more information about disk groups, please refer to the following Microsoft knowledge base
article:
222189 Description of Disk Groups in Windows Disk Management
http://support.microsoft.com/kb/222189/EN-US/.
Distributed Resource Scheduler (DRS)
A VMware vCenter specific feature which allows automatic load balancing of a ESX(i) cluster using
vMotion (p. 126).
