Diskpart clean - does it set a new uniqueid

[TheMonk-1]

Will diskpart clean set a new uniqueid on the selected disk?

A have a SSD in an external cabinet (USB-C) and when connecting it shows Status Offline (signature collision)

How can I set a new uniqueid  -  how do I select a new id ?  (at random?)

[NonSequitur777 · Accepted solution]

@TheMonk-1,

Welcome to our HP Community forum!

Yes, using diskpart clean will remove the existing partition table, including the disk signature (unique ID), but it does not automatically generate a new one until a partition is created and formatted.

Steps to Set a New UniqueID:

Option 1: Using diskpart

1. Open Command Prompt as Administrator

   • Press Win + X and select Command Prompt (Admin) or PowerShell (Admin).

2. Run diskpart

   • Type: diskpart and press Enter.

3. List available disks

   • Type: list disk and press Enter.

4. Select the affected disk

   • Type: select disk X (replace X with the correct disk number) and press Enter.

5. Clean the disk (optional, but will remove all data)

   • Type: clean and press Enter.

6. Assign a new UniqueID (random or specific)

   • To generate a random ID:

     • Type: uniqueid disk and press Enter (Windows will assign a new random ID).

   • To set a specific ID:

     • Type: uniqueid disk ID=<NewHexID> (e.g., uniqueid disk ID=12345678) and press Enter.

7. Exit diskpart

   • Type: exit and press Enter.

8. Reconnect the SSD

   • Safely remove the external drive, unplug it, then reconnect it.

 

Alternative: Using Disk Management:

1. Press Win + X → Select Disk Management.

2. Locate the Offline disk.

3. Right-click it and choose Online (this may auto-generate a new ID).

4. If it still shows a signature collision:

   • Right-click the disk and choose Initialize (WARNING: This erases data).

   • Format the disk to apply changes.

This ought to resolve the issue. Let me know if you need further clarification!

Kind Regards,

NonSequitur777