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Windows: How to see the block size of a drive


Microsoft Windows includes a utility in Windows called fsutil.  This tool displays drive information that cannot be seen in the GUI.

  1. Type: fsutil fsinfo ntfsinfo c:
  2. You should see something that looks like the following

Partition alignment on device :                         Aligned (0x000)
Performs Normal Seeks
Trim Not Supported

C:\Windows\system32>fsutil fsinfo ntfsinfo c:
NTFS Volume Serial Number :       0xd2caf83ccaf81f03
NTFS Version   :                  3.1
LFS Version    :                  2.0
Number Sectors :                  0x000000000634f7ff
Total Clusters :                  0x0000000000c69eff
Free Clusters  :                  0x000000000013a2b9
Total Reserved :                  0x0000000000001010
Bytes Per Sector  :               512
Bytes Per Physical Sector :       512
Bytes Per Cluster :               4096
Bytes Per FileRecord Segment    : 1024
Clusters Per FileRecord Segment : 0
Mft Valid Data Length :           0x0000000011dc0000
Mft Start Lcn  :                  0x00000000000c0000
Mft2 Start Lcn :                  0x0000000000000002
Mft Zone Start :                  0x00000000008ba660
Mft Zone End   :                  0x00000000008bbca0
Resource Manager Identifier :     113AA49C-B92F-11E3-9E65-AEF8CF9A8C09

By: Timothy Conrad