All hardware devices are given a unique ID that lets allows them to be identified uniquely on a computer. The operating system uses this ID to perform different functions on the device. Disk ID is a string composed of alphanumeric characters and cannot be changed. There are different types of disk IDs like the Device Instance ID and Hardware IDs.
Click on "Start" and then "Control Panel."
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Double-click on the "System" icon in the Control Panel.
Click on the "Hardware" tab on the System Properties dialog box, then click on the "Device Manager" button.
Click on the "+" sign next to "Disk drives" on the Device Manager window and then double-click on the disk for which you want to find the ID.
Click on the "Details" tab on the disk properties dialog box. Device Instance ID will be displayed. To view the hardware ID, click on the drop down box and then click on "Hardware IDs."