Re: script to verify networking and storage?

So for networking you basically want to count the number of pNICs and their connection state, save that info and verify the state after the intervention ?

And for the LUNs you want to verify the available LUNs with their CanonicalName ?

In that case the following would be a rather simplistic implementation.

The script you run before the maintenance

Get-VMHost|%{  New-ObjectPSObject-Property@{    Name=$_.Name
    pNICOnline=$_.ExtensionData.Config.Network.Pnic|      where {$_.LinkSpeed} |Measure-Object|Select-ExpandPropertyCount
    NumberOfLUN=$_.ExtensionData.Config.StorageDevice.ScsiLun|
      where {$_.DeviceType-eq"disk"} |Measure-Object|Select-ExpandPropertyCount  }
} |Export-CsvC:\esx-status.csv-NoTypeInformation-UseCulture

And after the maintenance you do the comparison with this script

Import-CsvC:\esx-status.csv-UseCulture|%{  $esx=Get-VMHost-Name$_.Name
  $pNICOnline=$esx.ExtensionData.Config.Network.Pnic|    where {$_.LinkSpeed} |Measure-Object|Select-ExpandPropertyCount
  $NumberOfLUN=$esx.ExtensionData.Config.StorageDevice.ScsiLun|
    where {$_.DeviceType-eq"disk"} |Measure-Object|Select-ExpandPropertyCount
  if($pNICOnline-ne$_.pNICOnline){    Write-Host"$esx.Name - pNIC problem - Before $($_.PNICOnline) - After : $($pNICOnline)"
  }  if($NumberOfLUN-ne$_.NumberOfLUN){    Write-Host"$esx.Name - LUN problem - Before $($_.NumberOfLUN) - After : $($NumberOfLUN)"
  }
}

Host profiles might be an option for the network part, for the LUN part I don't see how that could be done easily.