How to Find The Allocation Unit Size for a Volume

How to find the Allocation Unit Size for a Volume

CHUONG K. NGUYEN – BSc., MCSEx2, MCSAx2, MCP, MCTS, MCITP, CCNA

Launch the Command Prompt as Administrator, type

fsutil fsinfo ntfsinto F:

The Bytes Per Cluster information is the Allocation Unit Size.

Alternatively, you can use diskpart to achieve the same goal.

Type select volume 3

Type filesystem and the Allocation Unit Size will show.

That’s it!