ForEach Parallel doing VM Backups with TSM

Question

Hi guys, Storage admin here.
Wonder if you could help me with the following Powershell workflow. The objective is to run a backup per VM and wait for the result code to check if it needs to be re-run.
This is what I have until now:
workflow VMincrBKP{
    $VMlist = Get-Content -LiteralPath C:\SCRIPTS\VMLIST.txt
    foreach -parallel ($VM in $VMlist){
        $Tries=0
        do
        $Tries++
        "###### Try number $Tries ######"
        $Time = Get-Date
        $Retries = 3
        $Backup = Start-Process -PassThru -FilePath dsmc.exe -ArgumentList "backup vm $VM -asnode=ASNODE -mode=IFIncr -optfile=C:\SCRIPTS\dsm.opt -preview" -WorkingDirectory "C:\Program Files\Tivoli\TSM\baclient" -Wait
        $Result = $Backup.ExitCode
        "####### Success $Result ######"
        }until (($Tries -eq $Retries) -or ($Result -le 8))
        "####### Total Tries $Tries ######"
When I call this workflow I get the following:
PS C:\> VMincrBKP
###### Try number 1 ######
###### Try number 1 ######
###### Try number 1 ######
####### Success  ######
###### Try number 2 ######
####### Success  ######
###### Try number 2 ######
####### Success  ######
###### Try number 2 ######
####### Success  ######
###### Try number 3 ######
####### Success  ######
###### Try number 3 ######
####### Success  ######
###### Try number 3 ######
####### Success  ######
####### Success  ######
####### Total Tries 3 ######
####### Total Tries 3 ######
####### Success  ######
####### Total Tries 3 ######
The list contains 3 VM names, two exist and work fine but the third one should fail because it doesn't exist.

Answer 1

Hi ToribioAchaval,
I can not test with the cmd dsmc.exe, you can separately test the variable $Backup with inputing the wrong VM name, and check whether the value of $Result is less than or equal 8, because the loop will exit until the value of $Result is less than or
equal 8 or $Tries is equal 3.
Best Regards,
Anna