how to get the correct Virtual Disk for a VMware vm
Some times I have the problem, I need to resize or delete a VMware virtual disk, but I only know the guest’s drive letter. In vm’s where there are only one virtual disk, or where each virtual disk has a different size, this isn’t a problem. but if you have a vm with multiple virtual disk with exactly the same size, you can’t compare it between the guest Disk Manager and the virtual disk sizes. if your vm has more than one SCSI controller, the problem will increase.
| Windows Disk Manager | VMware VM settings |
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I searched long time to solve this problem, but I couldn’t find an easy solution for this. so I wrote this PowerShell script:
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<# .SYNOPSIS This script will return informations about virtual disks and windows disk allocation .DESCRIPTION This script will return informations about virtual disks and windows disk allocation .PARAMETER vCenterName defines the fqdn of the vCenter .PARAMETER vmName defines the name of the vm (like naming in vCenter, not the fqdn / dns name) .PARAMETER vmCred enter credentials to connect to the guest vm .EXAMPLE $vmCred = New-Object System.Management.Automation.PSCredential ('domain\username', ( ConvertTo-SecureString 'YourSecretPassword' -AsPlainText -Force ) ) .\ALL-OPR-get-VMDiskInfos.ps1 -vCenterName 'vcenter.domain.local' -vmName 'VMName' -vmcred $vmCred .NOTES -Author: Josh Burkard -Email : josh@burkard.it -CreationDate: 07.03.2018 -LastModifiedDate: -Version: 1.0.0.0 -History: 07.03.2018 1.0.0.0 Josh Burkard InitalVersion .LINK #> Param ( # Parameter help description [Parameter(Mandatory=$true)][string]$vCenterName, [Parameter(Mandatory=$true)][string]$vmName, [System.Management.Automation.PSCredential][Parameter(Mandatory=$true)]$vmCred ) #region Decalarations #endregion Decalarations #region Functions #endregion Functions #region Execution #region verify Params if ( [string]::IsNullOrEmpty( $vCenterName ) ) { Write-Host "parameter vCenterName was not definied" -ForegroundColor Red } elseif ( [string]::IsNullOrEmpty( $vmName ) ) { Write-Host "parameter vmName was not definied" -ForegroundColor Red } elseif ( [string]::IsNullOrEmpty( $vmCred ) ) { $vmCred = Get-Credential } else { Write-Verbose "all needed parameters set" } #endregion verify Params #region load VMware Snapins Write-Verbose "load VMware Snappins" foreach ($comp in "VMware.VimAutomation.Core", "VMware.ImageBuilder") { if (Get-Module -ListAvailable -Name $comp -ErrorAction:SilentlyContinue) { if (!(Get-Module -Name $comp -ErrorAction:SilentlyContinue)) { if (!(Import-Module -PassThru -Name $comp -ErrorAction:SilentlyContinue)) { Write-Host "FATAL ERROR: Failed to import the $comp module!" -ForegroundColor Red # Exit } } } else { if (Get-PSSnapin -Registered -Name $comp -ErrorAction:SilentlyContinue) { if (!(Get-PSSnapin -Name $comp -ErrorAction:SilentlyContinue)) { if (!(Add-PSSnapin -PassThru -Name $comp -ErrorAction:SilentlyContinue)) { Write-Host "FATAL ERROR: Failed to add the $comp snapin!" -ForegroundColor Red # Exit } } } else { Write-Host "FATAL ERROR: $comp is not available as a module or snapin! It looks like there is no compatible version of PowerCLI installed!" -ForegroundColor Red # Exit } } } #endregion load VMware Snapins #region connect to vCenter Write-Verbose "connecting to vCenter $vCenterName" try { Connect-VIServer -Server $vCenterName -WarningAction SilentlyContinue | Out-Null Write-Verbose "connected to vCenter $vCenterName" } catch { $ErrorMessage = $_.Exception.Message # $FailedItem = $_.Exception.ItemName Write-Host "couldn't connect to vCenter '$vCenter'" -ForegroundColor Red Write-Host $ErrorMessage -ForegroundColor Red # Exit } #endregion connect to vCenter #region get VM $vm = Get-VM -Name $vmName if ( [string]::IsNullOrEmpty( $vm ) ) { Write-Host "VM not found" -ForegroundColor Red # exit } else { Write-Verbose "vm $vmName found" } #endregion get VM #region get VM View for SCSI Controller $vmview = Get-View -ViewType VirtualMachine -Filter @{"Name" = $vmName} if ( !( [string]::IsNullOrEmpty( $vmview ) ) ) { Write-Verbose "vmView $vmName found" $vmDisks = @() $VirtualSCSIControllers = $vmview.Config.Hardware.Device | Where-Object {$_.DeviceInfo.Label -match "SCSI"} $VirtualSCSIController = $VirtualSCSIControllers[0] foreach ($VirtualSCSIController in $VirtualSCSIControllers ) { $VirtualDiskDevices = $vmview.Config.Hardware.Device | Where-Object { $_.ControllerKey -eq $VirtualSCSIController.Key } foreach ($VirtualDiskDevice in $VirtualDiskDevices ) { $vmDisks += New-Object -TypeName PSObject -Property @{ VirtualDeviceNode = "SCSI ($( $VirtualSCSIController.BusNumber ):$( $VirtualDiskDevice.UnitNumber )) $( $VirtualDiskDevice.DeviceInfo.Label )" PciSlotNumber = $VirtualSCSIController.SlotInfo.PciSlotNumber DataStore = $VirtualDiskDevice.Backing.DataStore FileName = $VirtualDiskDevice.Backing.FileName ControllerKey = $VirtualSCSIController.Key DiskKey = $VirtualDiskDevice.Key ControllerBus = $VirtualSCSIController.BusNumber ControllerUnitNumber = $VirtualSCSIController.UnitNumber DiskUnitNumber = $VirtualDiskDevice.UnitNumber } } } } else { Write-Host "VMView not found" -ForegroundColor Red # exit } #endregion get VM View for SCSI Controller #region get Disk and volumes from guest system $scripttext = @" [Int64]$('$')HKLM = "2147483650" [String]$('$')value = "UINumber" $('$')Reg_Query = Get-WmiObject -List "StdRegProv" -Namespace root\cimv2 $('$')PhysicalDisks = Get-WmiObject -Class "Win32_DiskDrive" -Namespace "root\CIMV2" # $('$')PhysicalDisks $('$')DiskDrives = Get-WmiObject Win32_DiskDrive $('$')DiskInfos = Get-WmiObject Win32_DiskDrive | ForEach-Object { $('$')DiskDrive = $('$')_ $('$')PNPDeviceID = $('$')DiskDrive.PNPDeviceID.split('\') $('$')key = "SYSTEM\CurrentControlSet\Enum\$('$')($('$')PNPDeviceID[0])\$('$')($('$')PNPDeviceID[1])\$('$')($('$')PNPDeviceID[2])" $('$')PciSlotNumber = ($('$')Reg_Query.GetDWORDValue($('$')HKLM,$('$')key,$('$')value)).uvalue $('$')UniqueId = ( ( $('$')PhysicalDisks | Where-Object { $('$')DiskDrive.DeviceID -eq "\\.\PHYSICALDRIVE$('$')( $('$')_.DeviceId )" } ).UniqueId ) If ( [string]::IsNullOrEmpty( $('$')UniqueId ) ) { $('$')UniqueId = ( $('$')PhysicalDisks | Where-Object { $('$')DiskDrive.DeviceID -eq $('$')_.Name } ).SerialNumber } $('$')DiskDriveToDiskPartitions = Get-WmiObject -Query "ASSOCIATORS OF {Win32_DiskDrive.DeviceID='$('$')($('$')DiskDrive.DeviceID)'} WHERE AssocClass = Win32_DiskDriveToDiskPartition" $('$')DiskDriveToDiskPartitions | ForEach-Object { $('$')partition = $('$')_ $('$')LogicalDiskToPartitions = Get-WmiObject -Query "ASSOCIATORS OF {Win32_DiskPartition.DeviceID='$('$')($('$')partition.DeviceID)'} WHERE AssocClass = Win32_LogicalDiskToPartition" $('$')LogicalDiskToPartitions | ForEach-Object { New-Object -Type PSCustomObject -Property @{ DiskSize = $('$')DiskDrive.Size DiskModel = $('$')DiskDrive.Model SCSIBus = $('$')DiskDrive.SCSIBus SCSILogicalUnit = $('$')DiskDrive.SCSILogicalUnit SCSIPort = $('$')DiskDrive.SCSIPort SCSITargetId = $('$')DiskDrive.SCSITargetId PNPDeviceID = $('$')DiskDrive.PNPDeviceID PciSlotNumber = $('$')PciSlotNumber UniqueId = $('$')UniqueId Partition = $('$')partition.Name RawSize = $('$')partition.Size DiskID = $('$')partition.DiskIndex StartingOffset = $('$')partition.StartingOffset DriveLetter = $('$')_.DeviceID VolumeName = $('$')_.VolumeName Size = $('$')_.Size FreeSpace = $('$')_.FreeSpace } } } } $('$')DiskInfos = $('$')DiskInfos | Where-Object { ( ! ( [string]::IsNullOrEmpty( $('$')_.UniqueId ) ) ) } # $('$')DiskInfos | Sort-Object DriveLetter, DiskID | Select-Object -Unique UniqueId, DiskID, DriveLetter, SCSIBus, SCSILogicalUnit, SCSIPort, SCSITargetId, PNPDeviceID, PciSlotNumber | Format-Table $('$')DiskInfos | convertTo-CSV "@ try { $WinDisks = Invoke-VMScript -VM $vm -ScriptText $scripttext -GuestCredential $vmCred -ErrorAction stop | convertfrom-csv } catch { $ErrorMessage = $_.Exception.Message # $FailedItem = $_.Exception.ItemName Write-Host "couldn't connect to VM guest" -ForegroundColor Red Write-Host $ErrorMessage -ForegroundColor Red exit } #endregion get Disk and volumes from guest system #region merge WinDisk and VMware Disk Infos $DiskInfos = @() # $WinDisk = $WinDisks[1] foreach ( $WinDisk in $WinDisks ) { $vmDisk = $vmDisks | Where-Object { $_.PciSlotNumber -eq $WinDisk.PciSlotNumber -and $_.DiskUnitNumber -eq $WinDisk.SCSITargetId } $DiskInfos += New-Object -TypeName PSOBject -Property @{ WinDiskID = $WinDisk.DiskID PCISlotNumber = $WinDisk.PciSlotNumber WinVolumeName = $WinDisk.VolumeName WinDiskSCSITargetId = $WinDisk.SCSITargetId DriveLetter = $WinDisk.DriveLetter VMControllerBusNumber = $vmDisk.ControllerBus VirtualDeviceNode = $vmDisk.VirtualDeviceNode FileName = $vmDisk.FileName DataStore = $vmDisk.DataStore } } $DiskInfos #endregion merge WinDisk and VMware Disk Infos #endregion Execution |
when you run the script, it will ask you for credentials and then shows you the informations about booth of your virtual disk and Windows drive :