tests/Test-HostDriveBlockSize.ps1

function Test-HostDriveBlockSize {
    [CmdletBinding()]
    param (
        [parameter()][string] $TestName = "Logical Drive Block Allocation",
        [parameter()][string] $TestGroup = "configuration",
        [parameter()][string] $TestCategory = "HOST",
        [parameter()][string] $Description = "Validate disk format block size",
        [parameter()][hashtable] $ScriptParams
    )
    try {
        $startTime = (Get-Date)
        [int]$bsize = Get-CmHealthDefaultValue -KeySet "siteservers:DiskFormatBlockSize" -DataSet $CmHealthConfig
        Write-Log -Message "block size required = $bsize"
        [System.Collections.Generic.List[PSObject]]$tempdata = @() # for detailed test output to return if needed
        $stat   = "PASS"
        $except = "WARNING"
        $msg    = "Success"
        [array]$vols = Get-WmiQueryResult -ClassName "Win32_Volume" -Query "DriveType=3" -Params $ScriptParams |
            Where-Object {$_.DriveLetter}
        foreach ($vol in $vols) {
            if ($vol.BlockSize -ne $bsize) {
                $res  = "FAIL"
                $stat = $except
                $msg  = "1 or more disks are not formatted to the recommended block size: $bsize bytes. "
                $msg += "Refer to https://docs.microsoft.com/en-us/mem/configmgr/core/plan-design/configs/site-size-performance-guidelines#example-disk-configurations"
            } else {
                $res = 'PASS'
            }
            $tempdata.Add([pscustomobject]@{
                Computer  = $ScriptParams.ComputerName
                Drive     = $vol.DriveLetter
                BlockSize = $vol.BlockSize
                Required  = $bsize
                Result    = $res
            })
        } # foreach
    }
    catch {
        $stat = 'ERROR'
        $msg = $_.Exception.Message -join ';'
    }
    finally {
        if ($cs) { $cs.Close(); $cs = $null }
        Set-CmhOutputData
    }
}