15081: Acronis Disk Director: Changing Cluster Size

Last update: 06-11-2018

How to change a volume's cluster size


(!) Acronis Disk Director will not let you change to a particular cluster size if this involves decreasing the free volume space to the point when the data does not fit on the volume.

(!) Some applications do not work correctly with volumes whose file systems have big cluster sizes (e.g. 64 KB in the FAT16 and FAT32 file systems or 8 KB through 64 KB in the NTFS file system).


  1. Select the volume and click Change cluster size:

  2. Select the cluster size and click OK:

  3. Commit the change: