How to Check Disk Speed Using Command Prompt

Hello Friend:

Having your read and write speed for your hard disk handy if you're experiencing performance issues or just want to know your PC storage speeds. In this tutorial, we will show you how to test your hard disk speed with Command Prompt (CMD) without needing to use third-party tools.

Step 1: Identify Your Installed Hard Drives

Before running any commands, you need to know how many hard drives are installed on your PC and which partition (drive letter) belongs to which physical disk.

1. Right-click on This PC (or My Computer) on your desktop or File Explorer.
2. Select Show more options (on Windows 11).
3. Click Manage to open Computer Management.
4. In the left sidebar, go to Disk Management.

Here, you’ll see all the hard disks connected to your system. Note the drive letters (like C:,

D:, etc.) associated with each disk, as we’ll use them in the CMD command.

Step 2: Open Command Prompt as Administrator

To use the disk speed command, follow these steps:

1. Press Windows + S to open the search bar.
2. Type cmd.
3. Right-click on Command Prompt and select Run as Administrator.

Step 3: Run the Disk Speed Test Command

Now that CMD is open, use the following command:

winsat disk -drive C

Replace C with the drive letter of the partition you want to test.

For example:

winsat disk -drive D

After pressing Enter, Windows will perform a read/write speed test. This process may take a few moments depending on the speed and type of your hard disk.

Step 4: View the Results

Once the test is complete, you’ll see detailed output showing:

ü  Sequential Read Speed

ü  Sequential Write Speed

ü  Random Read Speed

ü  Random Write Speed

These metrics give you a clear picture of how your drive is performing.

Step 5: Test Other Drives (If Needed)

To test another hard disk or partition, simply run the same command again with the new drive letter:

winsat disk -drive E

Repeat the process for each drive you want to test.

Final Words

That’s it! Using CMD and the built-in winsat tool, you can easily check the speed of any hard drive on your Windows PC without installing any third-party apps.

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