ACRONIS Backup & Recovery 11.5 Server for Windows User's Guide download pdf (Page 186)

The

selected target disk is not empty. The data on its volumes will be overwritten.

the data currently located on the chosen target disk will be lost irrevocably.

10.6.2.2 Cloning method and advanced options

The Clone basic disk operation usually means that the information from the source disk is

As is

possible to transfer all the information there exactly as it is stored at the source.

But with the wide range of available hardware it is normal that the target disk would differ in size

from the source. If the destination is larger, then it would be advisable to resize the source disk

volumes to avoid leaving unallocated space on the target disk by selecting the Proportionally resize

volumes option. The option to Clone basic disk 

will be carried out with proportional enlargement of all the source disk volumes so that no

unallocated space remains on the target disk .

If the destination is smaller, then the As is option of cloning will be unavailable and proportional

resizing of the source disk volumes will be mandatory. The program analyzes the target disk to

establish whether its size will be sufficient to hold all the data from the source disk without any loss.

If such transfer with proportional resizing of the source disk volumes is possible, but without any

data loss , then the user will be allowed to proceed. If due to the size limitations safe transfer of all

the source disk data to the target disk is impossible even with the proportional resizing of the

volumes, then the Clone basic disk operation will be impossible and the user will not be able to

continue.

If you are about to clone a disk comprising of a system volume, pay attention to the Advanced

options.

By clicking Finish, you'll add the pending operation of the disk cloning.

(To finish the added operation you will have to commit (p. 197) it. Exiting the program without

committing the pending operations will effectively cancel them.)

Using advanced options

When cloning a disk comprising of a system volume, you need to retain an operating system

bootability on the target disk volume. It means that the operating system must have the system

volume information (e.g. volume letter) matched with the disk NT signature, which is kept in the

MBR disk record. But two disks with the same NT signature cannot work properly under one

operating system.

If there are two disks having the same NT signature and comprising of a system volume on a machine, at the

startup the operating system runs from the first disk, discovers the same signature on the second one,

automatically generates a new unique NT signature and assigns it to the second disk. As a result, all the

volumes on the second disk will lose their letters, all paths will be invalid on the disk, and programs won't find

their files. The operating system on that disk will be unbootable.

You have the following two alternatives to retain system bootability on the target disk volume:

1. Copy NT signature  to provide the target disk with the source disk NT signature matched with

the Registry keys also copied on the target disk.

2. Leave NT signature  to keep the old target disk signature and update the operating system

according to the signature.

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ACRONIS Backup & Recovery 11.5 Server for Windows User's Guide Page 186