$esxcli to change the value of IOPS / s?

So im trying to change the value of IOPS / s by '1' it seems im on the right track in looking at a few other scripts that had something similar, but mine does not seem to the entire cluster in loop, look like it does, but only the last host gets the values updates, so I'm missing here?

Is it a snippet of code to connect to a VC, good practice get guests on a Cluster / Datacenter, then run agaisnt them? ID like to be able to keep a good labour code and then re use it on all my scripts? Now that I see this error Im curious to know if I was fooled into thinking that my other scripts worked not only on all hosts in a Cluster, which is a good way to check that?

THX!

# Script Variables
$VC = Read-Host "Please enter the name of the VirtualCenter.
$mycluster = Read-Host "Please enter the name of the Cluster or Datacenter Edition"
$DiskID = "naa.600".
$esxlogin = get-Credential
# Connect to VC and get the ESX hosts per cluster named
SE connect-VIServer $VC | Out-Null
foreach ($esx Get-cluster $mycluster |) Get - VMHost) {}
SE connect-VIServer $esx - Credential | Out-Null
}
#Retrieve instances esxcli and loop through them
{foreach ($esxcli in Get-EsxCli)
$esxcli.system.hostname.get)
$esxcli.storage.nmp.device.list () | where {$_.} Device-match $DiskID} | % {
$esxcli.storage.nmp.psp.roundrobin.deviceconfig.set ($null, $_.) Device, [long] 1, "IOPS", $false)
}
#Disconnect of ESX host
foreach ($esx Get-cluster $mycluster |) Get - VMHost) {}
Disconnect-VIServer $esx.name - confirm: $false
}
VCenter #Disconnect
Disconnect VIServer $VC - confirm: $false | Out-Null

You get the same behavior (white screen) when you run the script directly from the PowerCLI prompt?

This could be a phenomenon of PowerGui

Tags: VMware

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