script.ps1

$diskNum = 2 # The disk number to check
$chkdskCmd = "/x" # /x is faser, /r is more detailed
$diskLetter = "L:"

If (-Not ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) { 
    Write-Host 'Not running as admin, cant pereform checks' -ForegroundColor Red
} Else {
    if (-Not (Test-Path -Path "$PSScriptRoot\log\")) {
        New-Item -Path "$PSScriptRoot" -Name "log" -ItemType "Directory"
    }

    $running = $true
    while ($running) {
        Write-Host "running as admin"

        Write-Host "Changing disk number in files"
        $file = Get-Content -Path "$PSScriptRoot\diskpartCmdsOFF.txt"
        $file[0] = "select disk $diskNum"
        Set-Content -Path "$PSScriptRoot\diskpartCmdsOFF.txt" -Value $file
        $file = Get-Content -Path "$PSScriptRoot\diskpartCmdsON.txt"
        $file[0] = "select disk $diskNum"
        Set-Content -Path "$PSScriptRoot\diskpartCmdsON.txt" -Value $file

        $srlNum = Get-Disk -Number $diskNum | Select-Object SerialNumber, OperationalStatus
        $filePath = $PSScriptRoot + "\log\" + $srlNum.SerialNumber + ".txt"

        if ($srlNum.OperationalStatus.toString() -eq "Offline") {
            Write-Host "Setting disk online"
            diskpart /s "$PSScriptRoot\diskpartCmdsOFF.txt" | Out-File -FilePath $filePath
        }
        Write-Host "Running diskpart commands"
        diskpart /s "$PSScriptRoot\diskpartCmdsON.txt" | Out-File -FilePath $filePath
        
        Write-Host "Running check disk command with $chkdskCmd"
        chkdsk $chkdskCmd $diskLetter | Out-File -FilePath $filePath
        
        Write-Host "Successfully ran all commands, check log dir to output"
        $runAgain = Read-Host "Press ENTER to continue. EXIT to quit"
        if ($runAgain.ToString().ToLower() -eq "exit") {
           $running = $false
        }
    }
}