Acronis True Image for MS SBS Server - User Guide - Manual (Page 136)

The second method takes more time, but makes it impossible to recover data afterwards,
even with special equipment.
The first method is less secure, but is still suitable for most cases.
14.3.8 Selecting partition transfer method
Acronis True Image for Microsoft Small Business Server will offer you the following data
transfer methods:
As is
Proportional – the new disk space will be proportionally distributed among cloned
partitions
Manual – you will specify the new size and other parameters yourself
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