Argthtjtr

I need to know how to get the sector size for a drive letter, eg C:, without using fsutil in a PowerShell script. Batch and VBS are also acceptable.

The fsutil tool is perfect for this as it returns the exact data I need:

fsutil fsinfo ntfsinfo C:

NTFS Volume Serial Number :        0x32946b93946b587d

NTFS Version   :                   3.1

LFS Version    :                   2.0

Number Sectors :                   0x000000003a0b6c84

Total Clusters :                   0x0000000007416d90

Free Clusters  :                   0x00000000010a9da5

Total Reserved :                   0x0000000000002c98

Bytes Per Sector  :                512

Bytes Per Physical Sector :        512

Bytes Per Cluster :                4096

Bytes Per FileRecord Segment    :  1024

--- etc ---

However, I am using this script in an environment where there are lots of different languages of Windows in use, and Microsoft in their infinite wisdom decided to translate the output:

fsutil fsinfo ntfsinfo c:

NTFS-Volumeseriennummer :          0xdc7ccd5b7ccd3156

NTFS-Version :                     3.1

LFS-Version :                      2.0

Anzahl der Sektoren :              0x0000000004eec7ff

Gesamtzahl Cluster :               0x00000000009dd8ff

Freie Cluster :                    0x000000000059183d

Insgesamt reserviert :             0x000000000000430e

Bytes pro Sektor :                 512

Bytes pro physischem Sektor :      512

Bytes pro Cluster :                4096

Bytes pro Dateidatensatzsegment :  1024

--- usw ---

The information I need – bytes per sector – does not appear to be readily available from the WMI such that I can say "give me the data for C:", and attempts to pair disk-level data with volume-level data to try and patch together a query have been unsuccessful.

I'd hard-code the line number to get the data back from, but the amount of data returned from fsutil is inconsistent across versions of Windows. Both the examples above were taken from Windows 10 devices, where the data I need is on line 8, but on Windows 7 devices it is on line 7.

Does anyone know of a way for me to get this data such that i18n will not interfere with it? The only alternative is to hard-code the line number I need the data from, with accommodations made for the version of Windows I am running, which is too unreliable to consider.

I am looking for the "Bytes per Sector", not the "Bytes per physical sector" value.

Here is a command that will get the logical sector size, tested on Windows 7 and
on Windows 10:

wmic partition where "DeviceID like '%Disk #0%#0%'" get BlockSize  | findstr /v BlockSize

Or for the boot partition:

wmic partition where BootPartition=TRUE get BlockSize  | findstr /v BlockSize

Or even:

wmic partition where (BootPartition=TRUE and Type='GPT: System') get BlockSize  | findstr /v BlockSize

The command gets the information for the partition whose DeviceID is like
the specified string. The DeviceID of the first disk will be
"Disk #0, Partition #0", for the second disk it will be
"Disk #1, Partition #0" etc.
The findstr command is required to get rid of the header line.
Elevated permissions are not required for this.

This is the result on my computer:

You can pipe the output of fsutil to Select-String and search for 'Bytes Per Sector', 'Bytes pro Sektor', and other language variations to get the line with the info you want, irrespective of line number:

fsutil fsinfo ntfsinfo c: |

    select-string 'Bytes Per Sector|Bytes pro Sektor'

You can add additional language strings to the search string using the regular expression 'or' operator (|).

Keith

Why not just get them all then select for what you are after.

# Using cmd.exe

wmic partition get BlockSize, StartingOffset, Name, Index



# Results



<#

    BlockSize  Index  Name                   StartingOffset

    512        0      Disk #0, Partition #0  1048576

    512        1      Disk #0, Partition #1  472907776

    512        2      Disk #0, Partition #2  594542592

    512        3      Disk #0, Partition #3  508414656512

    512        4      Disk #0, Partition #4  510287413248

    512        0      Disk #1, Partition #0  135266304

    512        0      Disk #3, Partition #0  135266304

    512        0      Disk #2, Partition #0  135266304

#>





$wql = "SELECT Label, Blocksize, Name FROM Win32_Volume WHERE FileSystem='NTFS'"

Get-WmiObject -Query $wql -ComputerName '.' |

Select-Object Label, Blocksize, Name



# Results



<#

Label  Blocksize Name

-----  --------- ----

            4096 \?Volume{bba9420f-c375-409b-977a-b7d4f69b18e6}

Root        4096 C:

            4096 \?Volume{184c6e20-4659-4a3a-89e6-c529c69fe26b}

            4096 \?Volume{3ebf588c-f842-4c69-9a93-2f241231667e}

Data        4096 D:

SDN         4096 E:

EVO4TB      4096 F:

#>

Update for the OP

The above and below can be done with or without user interaction.

Get-WmiObject -Class Win32_DiskPartition | 

  Select-Object -Property Name, BlockSize, Description, BootPartition 

or WMIC

 Start-Process -FilePath powershell `

 -ArgumentList '-NoExit', 'wmic --% partition get BlockSize, StartingOffset, Name, Index'