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# Create an Array Diagnostic Utility (ADU) Report for an HC400 or HC1200 Gateway

The Array Diagnostics Utility (ADU) provides a diagnosis of the smart array RAID controllers, with information such as the array status and disks serial numbers.

## Step-by-step guide

### Create an Array Diagnostic Report from VMware ESXi Using Windows

This procedure does not involve any gateway downtime.

Prerequisites:

To set up the environment:

The procedure to set up the environment is done once only.

1.  Install VMware vSphere CLI for Windows.

2. Add the vSphere CLI folder (esxcli) path, such as c:\Program Files\hp\hpssaducli\bin, to the beginning of the value string for the Path system variables.
Notes: Use \\ instead of \ if necessary.
If you do not set this path you cannot successfully run the `HPSSADUESXI` command.

3. Install HP SSADU CLI for Windows (or Extract followed by running the MSI package, if running Windows on a virtual machine).
4. Add the HP SSADU CLI folder path, such as c:\Program Files\hp\hpssaducli\bin, to the beginning of the value string for the Path system variables.
Notes: Use \\ instead of \ if necessary.

To create the report:

1. In the Windows machine, open a command prompt window.
2. Enter the command