D-Link DNS-1250-04 Acronis Backup Software User Manual for DNS-1250-04 - Page 149

Disk backup (Image), Disk group, Dynamic disk

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Page 149 highlights

 creating and managing local tasks (p. 151), such as recovery tasks  creating and managing personal vaults (p. 151) and archives stored there  viewing the state, progress and properties  viewing and managing the log of the agent's operations  disk management operations, such as clone a disk, create volume, convert volume. A kind of direct management is performed when using bootable media. Disk backup (Image) A backup (p. 147) that contains a sector-based copy of a disk or a volume in a packaged form. Normally, only sectors that contain data are copied. Acronis Backup & Recovery Server OEM provides an option to take a raw image, that is, copy all the disk sectors, which enables imaging of unsupported file systems. Disk group A number of dynamic disks (p. 149) that store the common configuration data in their LDM databases and therefore can be managed as a whole. Normally, all dynamic disks created within the same machine (p. 151) 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 at least one of its members exists. 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/ Dynamic disk A hard disk managed by Logical Disk Manager (LDM) that is available in Windows starting with Windows 2000. LDM helps flexibly allocate volumes on a storage device for better fault tolerance, better performance or larger volume size. A dynamic disk can use either the master boot record (MBR) or GUID partition table (GPT) partition style. In addition to MBR or GPT, each dynamic disk has a hidden database where the LDM stores the dynamic volumes' configuration. Each dynamic disk holds the complete information about all dynamic volumes existing in the disk group which makes for better storage reliability. The database

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creating and managing local tasks (p. 151), such as recovery tasks
creating and managing personal vaults (p. 151) and archives stored there
viewing the state, progress and properties
viewing and managing the log of the agent's operations
disk management operations, such as clone a disk, create volume, convert volume.
A kind of direct management is performed when using bootable media.
Disk backup (Image)
A backup (p. 147) that contains a sector-based copy of a disk or a volume in a packaged form.
Normally, only sectors that contain data are copied. Acronis Backup & Recovery Server OEM provides
an option to take a raw image, that is, copy all the disk sectors, which enables imaging of
unsupported file systems.
Disk group
A number of dynamic disks (p. 149) that store the common configuration data in their LDM
databases and therefore can be managed as a whole. Normally, all dynamic disks created within the
same machine (p. 151) 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 at least
one of its members exists. 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
Dynamic disk
A hard disk managed by Logical Disk Manager (LDM) that is available in Windows starting with
Windows 2000. LDM helps flexibly allocate volumes on a storage device for better fault tolerance,
better performance or larger volume size.
A dynamic disk can use either the master boot record (MBR) or GUID partition table (GPT) partition
style. In addition to MBR or GPT, each dynamic disk has a hidden database where the LDM stores the
dynamic volumes' configuration. Each dynamic disk holds the complete information about all
dynamic volumes existing in the disk group which makes for better storage reliability. The database