How to run several diskspd instances.

run-diskspd.ps1

$testtimer=1800
$writepct=50
$blocksize='64k'
$threads=4
$outstandingio=16
$warmuptime=5
$filesize="10G"
$drives=@('D','E','F','G')
#$drives=@('E')
$diskspdpath = "C:\Users\Administrator\Downloads\DiskSpd\amd64\diskspd.exe"
$OutputPath = "C:\Users\Administrator\Downloads\"
$fileformat = '.txt'

Foreach ($drive in $drives){
    $date = Get-Date -Format 'yyyyMMdd-HHmmss'
    $data = ($OutputPath + $drive + '-' + $blocksize + '-' + $date + $fileformat)
    Start-Process cmd.exe `
    -ArgumentList ('/K' + $diskspdpath + ' -d' + $testtimer + ' -r' + ' -w' + $writepct + ' -t' + $threads + ' -o' + $outstandingio + ' -b' + $blocksize + ' -Sh -L -W'+ $warmuptime +' -c' + $filesize + ' ' + $drive + ':\TestFile\10G-file.dat' + ' && ' + 'exit') `
    -RedirectStandardOutput $data -WindowStyle:Minimized
}