Raw Redirect in Powershell

redirect.ps1

$list = @()

$psi = New-Object System.Diagnostics.ProcessStartInfo
$psi.FileName = "C:\pcDrDan\Cygwin\bin\ls.exe"
$psi.Arguments = "-l *.txt".Split(" ")
$psi.WorkingDirectory = $pwd.Path

$psi.UseShellExecute = $false
$psi.ErrorDialog = $false

$psi.RedirectStandardError = $false
$psi.RedirectStandardInput = $false
$psi.RedirectStandardOutput = $true

$proc = [System.Diagnostics.Process]::Start($psi)

$h = @{ "proc" = $proc; "psi" = $psi}
$list += @(,$h)

<#
$psi = New-Object System.Diagnostics.ProcessStartInfo
$psi.FileName = "C:\Windows\system32\findstr.exe"
$psi.Arguments = "/i nov".Split(" ")
$psi.WorkingDirectory = $pwd.Path

$psi.UseShellExecute = $false
$psi.ErrorDialog = $false

$psi.RedirectStandardError = $false
$psi.RedirectStandardInput = $true
$psi.RedirectStandardOutput = $false

$proc = [System.Diagnostics.Process]::Start($psi)

$h = @{ "proc" = $proc; "psi" = $psi}
$list += @(,$h)

$list[0]."proc".StandardOutput.BaseStream.CopyTo($list[1]."proc".StandardInput.BaseStream)
#>

$out = New-Object System.IO.StreamWriter(".\rdi2.txt")
$list[0]."proc".StandardOutput.BaseStream.CopyTo($out.BaseStream)
$out.Close()

<#
$wmidiskblock = { 
Param($ComputerName = "LocalHost") 
Get-WmiObject -ComputerName $ComputerName -Class win32_logicaldisk |  Where-Object {$_.drivetype -eq 3} 
} 
 
 
$Computers = @("arun-pc","JNJKRYSFPS01","psgusbrfps01")  
 #Start all jobs 
ForEach($Computer in $Computers) 
{ 
$Computer 
   Start-Job -scriptblock $wmidiskblock  -ArgumentList $Computer 
} 
Get-Job | Wait-Job 
$out = Get-Job | Receive-Job 
$out |export-csv wmi.csv
#>