ACRONIS Backup & Recovery 10 Server, Windows Guide de l'utilisateur télécharger pdf (Page 34)

Recovering dynamic volumes

A dynamic volume can be recovered

 over any type of existing volume

 to unallocated space of a disk group

 to unallocated space of a basic disk.

Recovery over an existing volume

When a dynamic volume is recovered over an existing volume, either basic or dynamic, the target

volume’s data is overwritten with the backup content. The type of target volume (basic,

simple/spanned, striped, mirrored, RAID 0+1, RAID 5) will not change. The target volume size has

to be enough to accommodate the backup content.

Recovery to disk group unallocated space

When a dynamic volume is recovered to disk group unallocated space, both the type and the

content of the resulting volume are recovered. The unallocated space size has to be enough to

accommodate the backup content. The way unallocated space is distributed among the disks is

also important.

Example

Striped volumes consume equal portions of space on each disk.

Assume you are going to recover a 30GB striped volume to a disk group consisting of two

disks. Each disk has volumes and a certain amount of unallocated space. The total size of

unallocated space is 40GB. The recovery will always result in a striped volume if the

unallocated space is distributed evenly among the disks (20GB and 20GB).

If one of the disks has 10GB and the other has 30GB of unallocated space, then the recovery

result depends on the size of the data being recovered.

 If the data size is less than 20GB, then one disk can hold, say, 10GB; the other will hold the

remaining 10GB. This way, a striped volume will be created on both disks and 20GB on the

second disk will remain unallocated.

 If the data size is more than 20GB, the data cannot be distributed evenly between the two

disks, but can fit into a single simple volume. A simple volume accommodating all the data

will be created on the second disk. The first disk will remain untouched.

Backed up (source):

Recovered to: Dynamic volume Basic MBR volume Basic GPT volume

Dynamic volume

Type as of the

target

Dynamic volume

Type as of the

target

Dynamic volume

Type as of the

target

Unallocated space (disk group)

Dynamic volume

Type as of the

source

Dynamic volume

Simple

N/A

Basic MBR volume

Basic MBR volume Basic MBR volume Basic MBR volume

Basic GPT volume

Basic GPT volume Basic GPT volume Basic GPT volume

Unallocated space (basic MBR disk)

Basic MBR volume Basic MBR volume Basic MBR volume

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 216 217

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ACRONIS Backup & Recovery 10 Server, Windows Guide de l'utilisateur Page 34

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