Function Install_MPIO_ssh {
    $hostname = $env:COMPUTERNAME
    $hostname = $hostname.Replace('-','_')

    #Add schedule action for the next step
    $path = Get-Location
    $path = $path.Path + '\2_CreateDisks.ps1'
    $arg = '-NoProfile -WindowStyle Hidden -File ' +$path
    $schAction = New-ScheduledTaskAction -Execute "Powershell.exe" -Argument $arg
    $schTrigger = New-ScheduledTaskTrigger -AtStartup
    $schPrincipal = New-ScheduledTaskPrincipal -UserId "NT AUTHORITY\SYSTEM" -LogonType ServiceAccount -RunLevel Highest
    $return = Register-ScheduledTask -Action $schAction -Trigger $schTrigger -TaskName "Create Vols and LUNs" -Description "Scheduled Task to run configuration Script At Startup" -Principal $schPrincipal
    #Install -Module Posh-SSH
    Write-host 'Enable MPIO and SSH for PowerShell' -ForegroundColor Yellow
    $return = Find-PackageProvider -Name 'Nuget' -ForceBootstrap -IncludeDependencies
    $return = Find-Module PoSH-SSH | Install-Module -Force
    #Install Multipath-IO with PowerShell using elevated privileges in Windows Servers
    Write-host 'Enable MPIO' -ForegroundColor Yellow
    $return = Install-WindowsFeature -name Multipath-IO -Restart
}
Install_MPIO_ssh
Remove-Item -Path $MyInvocation.MyCommand.Source

....
#Enable MPIO and Start iSCSI Service
Function PrepISCSI {
    $return = Enable-MSDSMAutomaticClaim -BusType iSCSI
    #Start iSCSI service with PowerShell using elevated privileges in Windows Servers
    $return = Start-service -Name msiscsi
    $return = Set-Service -Name msiscsi -StartupType Automatic
}
Function Create_igroup_vols_luns ($fsxN){
    $hostname = $env:COMPUTERNAME
    $hostname = $hostname.Replace('-','_')
    $volsluns = @()
    for ($i = 1;$i -lt 10;$i++){
        if ($i -eq 9){
            $volsluns +=(@{volname=('v_'+$hostname+'_log');volsize=$fsxN.logvolsize;lunname=('l_'+$hostname+'_log');lunsize=$fsxN.loglunsize})
        } else {
            $volsluns +=(@{volname=('v_'+$hostname+'_data'+[string]$i);volsize=$fsxN.datavolsize;lunname=('l_'+$hostname+'_data'+[string]$i);lunsize=$fsxN.datalunsize})
        }
    }
    $secStringPassword = ConvertTo-SecureString $fsxN.password -AsPlainText -Force
    $credObject = New-Object System.Management.Automation.PSCredential ($fsxN.login, $secStringPassword)
    $igroup = 'igrp_'+$hostname
    #Connect to FSx N filesystem
    $session = New-SSHSession -ComputerName $fsxN.svmip -Credential $credObject -AcceptKey:$true
    #Create igroup
    Write-host 'Creating igroup' -ForegroundColor Yellow
    #Find Windows initiator Name with PowerShell using elevated privileges in Windows Servers
    $initport = Get-InitiatorPort | select -ExpandProperty NodeAddress
    $sshcmd = 'igroup create -igroup ' + $igroup + ' -protocol iscsi -ostype windows -initiator ' + $initport
    $ret = Invoke-SSHCommand -Command $sshcmd -SSHSession $session
    #Create vols
    Write-host 'Creating Volumes' -ForegroundColor Yellow
    foreach ($vollun in $volsluns){
        $sshcmd = 'vol create ' + $vollun.volname + ' -aggregate aggr1 -size ' + $vollun.volsize #+ ' -vserver ' + $vserver
        $return = Invoke-SSHCommand -Command $sshcmd -SSHSession $session
    }
    #Create LUNs and mapped LUN to igroup
    Write-host 'Creating LUNs and map to igroup' -ForegroundColor Yellow
    foreach ($vollun in $volsluns){
        $sshcmd = "lun create -path /vol/" + $vollun.volname + "/" + $vollun.lunname + " -size " + $vollun.lunsize + " -ostype Windows_2008 " #-vserver " +$vserver
        $return = Invoke-SSHCommand -Command $sshcmd -SSHSession $session
        #map all luns to igroup
        $sshcmd = "lun map -path /vol/" + $vollun.volname + "/" + $vollun.lunname + " -igroup " + $igroup
        $return = Invoke-SSHCommand -Command $sshcmd -SSHSession $session
    }
}
Function Connect_iSCSI_to_SVM ($TargetPortals){
    Write-host 'Online, Initialize and format disks' -ForegroundColor Yellow
    #Connect Windows Server to svm with iSCSI target.
    foreach ($TargetPortal in $TargetPortals) {
        New-IscsiTargetPortal -TargetPortalAddress $TargetPortal
        for ($i = 1; $i -lt 5; $i++){
            $return = Connect-IscsiTarget -IsMultipathEnabled $true -IsPersistent $true -NodeAddress (Get-iscsiTarget | select -ExpandProperty NodeAddress)
        }
    }
}
Function Create_Partition_Format_Disks{

    #Create Partion and format disk
    $disks = Get-Disk | where PartitionStyle -eq raw
    foreach ($disk in $disks) {
        $return = Initialize-Disk $disk.Number
        $partition = New-Partition -DiskNumber $disk.Number -AssignDriveLetter -UseMaximumSize | Format-Volume -FileSystem NTFS -AllocationUnitSize 65536 -Confirm:$false -Force
        #$return = Format-Volume -DriveLetter $partition.DriveLetter -FileSystem NTFS -AllocationUnitSize 65536
    }
}
Function UnregisterTask {
    Unregister-ScheduledTask -TaskName "Create Vols and LUNs" -Confirm:$false
}
Start-Sleep -s 30
$fsxN = @{svmip ='198.19.255.153';login = 'vsadmin';password='net@pp11';datavolsize='10GB';datalunsize='8GB';logvolsize='8GB';loglunsize='6GB'}
$TargetPortals = ('10.2.1.167', '10.2.2.12')
PrepISCSI
Create_igroup_vols_luns $fsxN
Connect_iSCSI_to_SVM $TargetPortals
Create_Partition_Format_Disks
UnregisterTask
Remove-Item -Path $MyInvocation.MyCommand.Source
....