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This is current product behavior
Acronis Disk Director 11 only supports disks with 512 bytes logical sector size
How to change a volume's cluster size
This is a limitation
You need to have unallocated space on the disk with the partition the size of which you intend to increase
This has been fixed
There were new columns added in Build 11345
If there are both ShadowProtect and Acronis Backup & Recovery 10 Agent for Windows installed on the same machine and you back up with VSS enabled, the incremental and differential backups will be of the same size as the full ones