Using powershell to get ntfs info (such as cluster size)

20100331 - slight update.  Converting the hex items to dec and allowing passing of multiple drives.
20131230 - slight update.  Changed the convert to use an Int64 instead of int32 as I was getting overflow on larger drives

A new function for my library.   Base idea copped from Jacques Barathon [MS] at the bottom of this thread and hashed out to get all the properties.

function get-ntfsinfo {

      param ([char[]]$drive = "c")

     

      $drive | foreach {

            if (test-path "$($_):") {

                  $cs = new-object PSObject

                  $cs | add-member NoteProperty Drive $_

                  $output = (fsutil fsinfo ntfsinfo "$($_):")

                  foreach ($line in $output) {

                        $info = $line.split(':')

                        #if the value is hex, convert to dec and put hex in ()

                        if ($info[1].trim().startswith('0x0')) {

                              $info[1] = [Convert]::ToInt64(($info[1].Trim()),16).toString() + " (" + $info[1].Trim().toString() + ")"

                        }

                        $cs | add-member NoteProperty $info[0].trim().Replace(' ','_') $info[1].trim()

                        $info = $null

                  }

                  $cs

            } else {

                  throw "Drive '$_' not found"

            }

      }

}

A basic run gives you:
PS C:\Windows\system32> get-ntfsinfo e


Drive                           : e
NTFS_Volume_Serial_Number       : 0xeabe7aefbe7ab423
Version                         : 3.1
Number_Sectors                  : 558614527 (0x00000000214bc7ff)
Total_Clusters                  : 69826815 (0x00000000042978ff)
Free_Clusters                   : 36249097 (0x0000000002291e09)
Total_Reserved                  : 0 (0x0000000000000000)
Bytes_Per_Sector                : 512
Bytes_Per_Cluster               : 4096
Bytes_Per_FileRecord_Segment    : 1024
Clusters_Per_FileRecord_Segment : 0
Mft_Valid_Data_Length           : 262144 (0x0000000000040000)
Mft_Start_Lcn                   : 786432 (0x00000000000c0000)
Mft2_Start_Lcn                  : 2 (0x0000000000000002)
Mft_Zone_Start                  : 786496 (0x00000000000c0040)
Mft_Zone_End                    : 837664 (0x00000000000cc820)
RM_Identifier                   : 04E578BF-2D2F-11DF-9782-18A9055883A2

But the nice thing here is being able to say
PS C:\Windows\system32> (get-ntfsinfo e).Bytes_Per_Cluster
4096

I then looped it to check cluster size (what I really wanted) on each drive on the server.

foreach ($drive in Get-PSDrive | where {$_.Provider.name -eq "FileSystem"}) {

      if ($drive.free -ne $null) {

            "$drive - $((get-ntfsinfo $drive.name).bytes_per_cluster)"

      }

}

gives output like:

C - 4096

E - 4096

G - 65536

J - 4096

K - 4096

L - 4096

M - 65536

N - 65536

O - 65536

Q - 4096

S - 65536

T - 65536

Z – 4096

Let me know if you use it…