Zerto Volume Locator (VM Guest Drive → vSphere Disk/LUN Map)

This PowerShell/PowerCLI script maps Windows VM drive letters to their corresponding vSphere virtual disks and storage details, helping identify TempDB and page file volumes for VPG creation.

Features

• Maps guest drives to VMware disks and LUNs.
• Outputs CSV and failure log.

Prerequisites

• PowerShell 5.1 or 7.x
• VMware.PowerCLI module
• Network access to vCenter (443) and ESXi hosts (902)
• VMware Tools running on Windows VMs

How to Run

1. Launch PowerShell as Administrator.
2. Import PowerCLI: Import-Module VMware.PowerCLI
3. Run script: C:\Path\To\Zerto Volume Locator.ps1
4. Follow prompts for vCenter and guest credentials.

Output

• CSV: C:\VM_Drive_to_vSphere_LUN_Map.csv
• Failures: C:\VM_Drive_to_vSphere_LUN_Failures.log

Security Notes

• vCenter credentials can be saved locally.
• Guest credentials are prompted at runtime.

Troubleshooting

See failure log for details.

Legal Disclaimer

This script is provided as an example only and is not supported under any Zerto support program or service.

The author and Zerto disclaim all implied warranties, including merchantability and fitness for a particular purpose.
In no event shall Zerto or the author be liable for damages arising from the use or inability to use this script.
Use at your own risk.

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Author: AJ Lastoff
Company: Zerto (HPE)
Version: 1.0
Date: December 2025