PowerShell - Continuously write random data to a disk

benchmark-disk.ps1

# running this will consume 10GB of data in the target path
# use SIGINT to stop (Ctrl + C)

function Run {

    Param(
        [ValidateNotNullOrEmpty()]
        [string]$Target
    )

    New-Item -Path $Target -Type directory -Force

    $count = 0
    while ($True) {

        $count++
        $count %= 10000 # prevent filling up the disk
        
        $out = new-object byte[] 1048576
        (new-object Random).NextBytes($out)

        $time = Get-Date -Format o
        $duration = Measure-Command {
            try {
                [IO.File]::WriteAllBytes((Join-Path $Target "file-$count.dat"), $out)
            } catch {}
        }

        Write-Output "$time`t$count`t$duration"

    }
}

try {
    $start = Get-Date -Format yyyyMMddTHHmmssffffZ
    Start-Transcript -Path "./writetest-$start.txt"
    Run -Target (Join-Path '/tmp' 'test')
} finally {
    Stop-Transcript
}