How to correlate azure disk object with actual disk within the VM?

You can easily do so by looking at LUN ID. On azure portal, check those values:

View on Azure portal

And inside the VM, in disk management blade, check disk properties:

Picture disk properties

Look at the LUN id within the OS:

Picture disk properties

The values from the portal and the OS should match and will help you to identify the correct drive.

You can also use the script below, if you are not a big fan of clicking to see location and drive letter of each drive:


$disks = Get-CimInstance -Namespace root\Microsoft\Windows\Storage -ClassName MSFT_Disk
foreach ($disk in $disks) {

    $lun = $null
    if ($disk.Location -match "SCSI\((\d+),(\d+),(\d+)\)") {
        $lun = [int]$matches[3]
    }

    $partitions = Get-CimInstance -Namespace root\Microsoft\Windows\Storage -ClassName MSFT_Partition |
                  Where-Object { $_.DiskNumber -eq $disk.Number }

    $driveLetters = $partitions | ForEach-Object {
        if ($_.AccessPaths) {
            foreach ($path in $_.AccessPaths) {
                if ($path -match "^[A-Z]:\\$") {
                    $path.Substring(0,2)
                }
            }
        }
    }

    [PSCustomObject]@{
        DiskNumber    = $disk.Number
        FriendlyName  = $disk.FriendlyName
        Location      = $disk.Location
        DriveLetters  = ($driveLetters -join ', ')
    }
}

The output should look like this: Powershell output

Linux

Linux is much easier:


[root@rhel89latestminor ~]# dmesg | grep "Attached SCSI"
[    9.511375] sd 1:0:0:2: [sdd] Attached SCSI disk
[    9.514221] sd 0:0:0:1: [sda] Attached SCSI disk
[    9.522442] sd 1:0:0:0: [sdc] Attached SCSI disk
[    9.545461] sd 1:0:0:1: [sdb] Attached SCSI disk
[    9.620817] sd 0:0:0:0: [sde] Attached SCSI disk


[root@rhel89latestminor ~]# lsscsi
[0:0:0:0]    disk    Msft     Virtual Disk     1.0   /dev/sde
[0:0:0:1]    disk    Msft     Virtual Disk     1.0   /dev/sda
[1:0:0:0]    disk    Msft     Virtual Disk     1.0   /dev/sdc
[1:0:0:1]    disk    Msft     Virtual Disk     1.0   /dev/sdb
[1:0:0:2]    disk    Msft     Virtual Disk     1.0   /dev/sdd

0:0:0:0 -> always OS 0:0:0:1 -> always temp 1:0.0.X -> always Data, where X = Lun number

Dmitry Porotnikov / How to correlate azure disk object with actual disk within the VM?

How to correlate azure disk object with actual disk within the VM?

Linux