Tech Kiranangal: Matching VMware Virtual disks and Windows OS disks using VMware Vsphere Power CLI

When working with server with several disks, Sometimes it is difficult to trace "Windows disk" corresponding to "Virtual disk". Below Steps will help you to match Windows guest disk with VMware Virtual disks.

Step 1:

First step is to open "Vmware Vsphere Power CLI" and execute command "Connect-VIServer VcenterName".In my case, I did it from vcenter server. It will prompt vCenter Credentials.

In case you are getting Certificate error during "Connect-VIServer" operation,

Follow below link to fix it.

Connect-VI Server : Invalid Certificate error

Step 2:

Execute below power shell script to list the disk details. While executing, script will prompt you to enter Guest OS credential to execute Get-WmiObject Command.

Script will list the VMDK name corresponding to the "WindowsDiskIndex" as below.

"WindowsdiskIndex" is the disk number "Disk 0, Disk 1,..." showing in "Disk management"

Copy below script in notepad and change its extension to .ps1 PowerShell script.

Modify the "MYVM001" with the Virtual machine name you want to find disk Layout.

#-------------------------------------------PowerShellScript-------------------------

$vmName = "MYVM001"

####Dont need to modify below lines of codes

$cred = if ($cred){$cred}else{Get-Credential}

$win32DiskDrive = Get-WmiObject -Class Win32_DiskDrive -ComputerName $vmName -Credential $cred

$vmHardDisks = Get-VM -Name $vmName | Get-HardDisk

$vmDatacenterView = Get-VM -Name $vmName | Get-Datacenter | Get-View

$virtualDiskManager = Get-View -Id VirtualDiskManager-virtualDiskManager

foreach ($disk in $win32DiskDrive)

{

$disk | Add-Member -MemberType NoteProperty -Name AltSerialNumber -Value $null

$diskSerialNumber = $disk.SerialNumber

if ($disk.Model -notmatch 'VMware Virtual disk SCSI Disk Device')

{

if ($diskSerialNumber -match '^\S{12}$'){$diskSerialNumber = ($diskSerialNumber | foreach {[byte[]]$bytes = $_.ToCharArray(); $bytes | foreach {$_.ToString('x2')} } ) -join ''}

$disk.AltSerialNumber = $diskSerialNumber

}

$results = @()

foreach ($vmHardDisk in $vmHardDisks)

{

$vmHardDiskUuid = $virtualDiskManager.queryvirtualdiskuuid($vmHardDisk.Filename, $vmDatacenterView.MoRef) | foreach {$_.replace(' ','').replace('-','')}

$windowsDisk = $win32DiskDrive | where {$_.SerialNumber -eq $vmHardDiskUuid}

if (-not $windowsDisk){$windowsDisk = $win32DiskDrive | where {$_.AltSerialNumber -eq $vmHardDisk.ScsiCanonicalName.substring(12,24)}}

$result = "" | select vmName,windowsDiskIndex,vmHardDiskVmdk,vmHardDiskDatastore,vmHardDiskName,windowsDiskSerialNumber,vmHardDiskUuid,windowsDiskAltSerialNumber,vmHardDiskScsiCanonicalName

$result.vmName = $vmName.toupper()

$result.windowsDiskIndex = if ($windowsDisk){$windowsDisk.Index}else{"FAILED TO MATCH"}

$result.vmHardDiskVmdk = $vmHardDisk.filename.split(']')[1].trim()

$result.vmHardDiskDatastore = $vmHardDisk.filename.split(']')[0].split('[')[1]

$result.vmHardDiskName = $vmHardDisk.Name

$result.windowsDiskSerialNumber = if ($windowsDisk){$windowsDisk.SerialNumber}else{"FAILED TO MATCH"}

$result.vmHardDiskUuid = $vmHardDiskUuid

$result.windowsDiskAltSerialNumber = if ($windowsDisk){$windowsDisk.AltSerialNumber}else{"FAILED TO MATCH"}

$result.vmHardDiskScsiCanonicalName = $vmHardDisk.ScsiCanonicalName

$results += $result

}

$results = $results | sort {[int]$_.vmHardDiskName.split(' ')[2]}

$results | ft -AutoSize

##-----------------------------------ScriptEnd----------------------------------------------------------

Script result:

You may get an output similar as below.

vmHardDiskVmdk vmHardDiskName windowsDiskIndex vmName

-------------- -------------- ---------------- ------
MYVMMACHINE/MYVMMACHINE.vmdk Hard disk 1 0 MYVMMACHINE...
MYVMMACHINE/MYVMMACHINE_7.vmdk Hard disk 2 1 MYVMMACHINE...
MYVMMACHINE/MYVMMACHINE_12.vmdk Hard disk 3 2 MYVMMACHINE...
MYVMMACHINE/MYVMMACHINE_3.vmdk Hard disk 4 3 MYVMMACHINE...
MYVMMACHINE/MYVMMACHINE_5.vmdk Hard disk 5 4 MYVMMACHINE...
MYVMMACHINE/MYVMMACHINE_1.vmdk Hard disk 6 5 MYVMMACHINE...
MYVMMACHINE/MYVMMACHINE_2.vmdk Hard disk 7 6 MYVMMACHINE...
MYVMMACHINE/MYVMMACHINE_8.vmdk Hard disk 8 7 MYVMMACHINE...
MYVMMACHINE/MYVMMACHINE_9.vmdk Hard disk 9 8 MYVMMACHINE...

Matching With Guest OS Disk:

WindowsdiskIndex is the disk number "Disk 0, Disk 1,..." showing in "Disk management"