[PowerCLI] Move-VMDisk2

Function Move-VMDisk2 {

<#
.DESCRIPTION
 This script will storage vMotion a designated VM with 2 disks on different LUNs to 2 different LUNs in VMWare ESXi.
.EXAMPLE USAGE
 Move-VMDisk2 -VMName TestBox -OriginalLun1Name Lun1 -OriginalLun2Name Lun2 -DestinationLun1Name Lun4 -DestinationLun2Name Lun5
.NOTES
 Script created from reference https://psvmware.wordpress.com/2012/09/04/storage-vmotion-to-different-datastores-for-different-vm-hard-disks/
 and from reference http://sites.utexas.edu/dbailey/2012/10/29/advanced-storage-vmotions-via-powershell/
 Accessed on 2/9/2016
.DISCLAIMER
 This script does not take into account the scenario where a VM may have multiple disks on a single LUN. It is set to error out if it detects that scenario.
,REQUIRED MODULES
 PowerCLI by VMWare
#>

    param(
        [parameter(Mandatory=$true,
                   Position=0)]
        [String]
        $VMName,

        [parameter(Mandatory=$true,
                   Position=1)]
        [String]
        $OriginalLun1Name,

        [parameter(Mandatory=$true,
                   Position=2)]
        [String]
        $OriginalLun2Name,

        [parameter(Mandatory=$true,
                   Position=3)]
        [String]
        $DestinationLun1Name,

        [parameter(Mandatory=$true,
                   Position=4)]
        [String]
        $DestinationLun2Name
         )

    ###--- IMPORTANT --- This assumes the VM does NOT have multiple disks on the same Lun - DO NOT USE if that is the case###

    $cred = Import-Clixml -Path <Path to XML credential file>

    Connect-VIServer -Server <ServerName> -Credential $cred | Out-Null

    Try{
        $VM = Get-VM -Name $VMName
    }
    Catch{
        Write-Error -Message "Unable to locate a VM with name $VMName."
        Break
    }
    $Disks = $VM | Get-HardDisk
    $Disk1 = $Disks | Where-Object{$_.Filename -match $OriginalLun1Name}
    If(!$Disk1){Write-Error -Message "Unable to locate VM disk on Lun matching name: $OriginalLun1Name";Break}
    $Disk2 = $Disks | Where-Object{$_.Filename -match $OriginalLun2Name}
    If(!$Disk2){Write-Error -Message "Unable to locate VM disk on Lun matching name: $OriginalLun2Name";Break}

    If($Disk1.Count -gt 1 -or $Disk2.Count -gt 1){
        Write-Error -Message "This script does not support moving VMs with multiple disks on a single LUN."
        Break
    }
    $DiskIds = New-Object System.Collections.ArrayList
    $DiskIds.Add($Disk1.Id.Split('/')[1]) | Out-Null
    $DiskIds.Add($Disk2.Id.Split('/')[1]) | Out-Null

    Try{
        $Lun1 = (Get-Datastore -Name $DestinationLun1Name -ErrorAction Stop | Get-View).MoRef.Value
    }
    Catch{
        Write-Error -Message "Unable to find LUN with name: $DestinationLun1Name"
        Break
    }
    Try{
        $Lun2 = (Get-Datastore -Name $DestinationLun2Name -ErrorAction Stop | Get-View).MoRef.Value
    }
    Catch{
        Write-Error -Message "Unable to find LUN with name: $DestinationLun2Name"
        Break
    }

    $Spec = New-Object VMware.Vim.VirtualMachineRelocateSpec

    $Spec.Datastore = New-Object VMware.Vim.ManagedObjectReference
    $Spec.Datastore.Type = 'Datastore'
    $Spec.Datastore.Value = $Lun1

    $Spec.Disk = New-Object VMware.Vim.VirtualMachineRelocateSpecDiskLocator[] (2)
    $Spec.Disk[0] = New-Object VMware.Vim.VirtualMachineRelocateSpecDiskLocator
    $Spec.Disk[0].DiskId = $DiskIds[0]
    $Spec.Disk[0].Datastore = New-Object VMware.Vim.ManagedObjectReference
    $Spec.Disk[0].Datastore.Type = 'Datastore'
    $Spec.Disk[0].Datastore.Value = $Lun1
    $Spec.Disk[1] = New-Object VMware.Vim.VirtualMachineRelocateSpecDiskLocator
    $Spec.Disk[1].DiskId = $DiskIds[1]
    $Spec.Disk[1].Datastore = New-Object VMware.Vim.ManagedObjectReference
    $Spec.Disk[1].Datastore.Type = 'Datastore'
    $Spec.Disk[1].Datastore.Value = $Lun2

    If($VM.PowerState -eq "PoweredOn"){

    Shutdown-VMGuest -VM $VM.Name -Confirm:$false | Out-Null
        Start-Sleep -Seconds 5
    }

    While((Get-VM -Name $VM.Name).PowerState -eq "PoweredOn"){
        Start-Sleep -Seconds 5
    }

    $VM.ExtensionData.RelocateVM_Task($Spec, 'defaultPriority') | Out-Null

    While((Get-Task | Where-Object{$_.Name -eq 'RelocateVM_Task'}).State -eq "Running"){
        Start-Sleep -Seconds 10
    }

    Start-VM -VM $VM.Name -Confirm:$false -RunAsync | Out-Null

    Disconnect-VIServer -Confirm:$false | Out-Null
}