How Long Does DiskPart Clean All Take? A Complete Guide

Introduce

If you are managing storage on a Windows machine, you’ve likely encountered the powerful command-line utility known as DiskPart. Whether you are troubleshooting a "RAW" drive, preparing a laptop for resale, or trying to fix a corrupted partition table, DiskPart is the go-to tool. However, among its many commands, the "clean all" command is both the most effective and the most time-consuming.

When you hit Enter on that command, the Command Prompt window offers no progress bar, no percentage, and no estimated time of completion. This leads every user to the same question: How long does DiskPart clean all take?

In this comprehensive guide, we will explore the nuances of this command, the time estimates for different hardware, and what to do if you realize you’ve made a mistake.

Understanding the Command: Clean vs. Clean All

To understand the timing, you must first understand the workload. DiskPart offers two different "cleaning" levels, and knowing the difference can save you hours of unnecessary waiting.

1. The "Clean" Command (The Fast Option)

The standard clean command removes the partition information and the Master Boot Record (MBR) or GUID Partition Table (GPT) from the disk. It does not overwrite the data; it simply tells the computer that the space is now "unallocated" and ready for new data.

• How long does it take? Usually 1–5 seconds.
• Security Level: Low. Since the data is still physically present on the platters or NAND cells, it is easily recoverable.

2. The "Clean All" Command (The Secure Option)

The clean all command does everything the standard clean does, but with one massive addition: it writes a zero to every single sector on the disk. This is a "secure erase" or "zero-fill." It physically overwrites your files with nothingness, ensuring that the previous bits and bytes are destroyed.

• How long does it take? This is the focus of our guide—it ranges from minutes to many hours depending on the drive size.
• Security Level: High. This is designed to prevent standard data recovery software from finding your files.

Important: A Safety Net Before You Clean

Before we get into the hourly breakdown of the "clean all" process, there is a critical warning every user must heed: This process is irreversible once finished.

If you have accidentally targeted the wrong drive or realized you forgot to back up a specific folder, you need a professional-grade recovery solution immediately.

Introducing MyRecover: Your Data Safety Partner

In the world of disk management, mistakes are common. You might accidentally select "Disk 1" (your backup) instead of "Disk 2" (the empty USB). This is where MyRecover becomes an essential tool in your kit.

MyRecover is a professional Windows data recovery software designed to handle scenarios where partitions have been deleted or disks have been "cleaned."

• When to use it: If you ran the standard clean command, MyRecover can scan the unallocated space and reconstruct your files with an exceptionally high success rate because the data hasn't been overwritten yet.
• In the middle of a Clean All: If you accidentally started a clean all and stopped it immediately, the "tail end" of your drive may still contain your data. MyRecover is specialized in scanning these disrupted partitions to salvage whatever hasn't been zeroed out.
• Features: It supports recovery from NTFS, FAT32, exFAT, and ReFS file systems and can recover over 1000 types of data, including photos, videos, documents, and emails.

Try it Free
Windows 11/10/8.1/8/7

100% Secure

Always keep a recovery tool like MyRecover handy before performing deep-level disk operations. It serves as the ultimate "undo" button for logical disk errors.

How Long Does Clean All DiskPart Take? (The Benchmarks)

There is no "one size fits all" answer to how long does clean all DiskPart take, but we can look at averages based on the hardware interface and drive type.

1. Mechanical Hard Drives (HDD)

Hard drives are the slowest because they rely on a physical spinning platter and a moving read/write head. The drive must physically move the head to every sector to write a zero.

• 500GB HDD: 1.5 to 2 hours.
• 1TB HDD: 2.5 to 4 hours.
• 2TB HDD: 5 to 7 hours.
• 4TB+ HDD: 10 to 20+ hours.

A standard 7200 RPM drive writes at roughly 100MB/s to 150MB/s. When you factor in the overhead of the DiskPart utility and the Windows OS, the real-world speed is often at the lower end of that spectrum.

2. Solid State Drives (SSD)

SSDs are significantly faster because they have no moving parts. However, "clean all" is still slower than a standard format because it must address every NAND cell.

• 500GB SSD: 20 to 40 minutes.
• 1TB SSD: 45 to 90 minutes.
• NVMe SSDs: These are the fastest. An NVMe drive on a PCIe 4.0 slot can sometimes finish a 1TB "clean all" in under 20 minutes, though DiskPart's single-threaded nature often acts as a bottleneck.

3. External USB Drives and Flash Media

This is where users often get frustrated. The bottleneck is usually the USB port or the controller, not the drive itself.

• USB 3.0 (128GB Flash Drive): 30–45 minutes.
• USB 2.0 (128GB Flash Drive): 2 to 4 hours.
• USB 2.0 (1TB External HDD): This can take24 to 48 hours.

If you are using a USB 2.0 port for a large drive, we highly recommend switching to a USB 3.0 port (usually blue) or an internal SATA connection to save yourself a day of waiting.

Factors That Determine How Long Clean All Take in DiskPart

If your process is taking longer than the averages listed above, one of these five factors is likely the culprit:

1. Physical Write Speed

Not all drives are created equal. A high-end Western Digital Black HDD will finish much faster than a budget "Green" drive designed for low power consumption. Similarly, QLC NAND SSDs may slow down as their cache fills up during a sustained write like a "clean all" operation.

2. Connection Interface

Are you using SATA II (3Gbps) or SATA III (6Gbps)? Is your external drive plugged into a hub or directly into the motherboard? Direct connections to the motherboard’s SATA or M.2 ports will always yield the fastest results. Avoid using unpowered USB hubs when running DiskPart commands.

3. Drive Health and Bad Sectors

If the drive you are cleaning is old or failing, theclean allcommand will take significantly longer. Windows will attempt to write a zero to a bad sector, fail, retry several times, and then eventually move on. If a drive has thousands of "pending sectors," the process can appear to hang indefinitely.

4. Background System Activity

While DiskPart doesn't use much CPU power, it uses a massive amount of "Disk I/O" (Input/Output). If you are downloading a large game, rendering a video, or running a virus scan on another drive, the motherboard's data bus may be saturated, slowing down the cleaning process.

5. Why DiskPart Has No Progress Bar

Many users ask why Microsoft hasn't added a percentage counter. The reason is technical: DiskPart sends the "zero-fill" instruction to the disk controller. Because it is a low-level command, the OS doesn't always receive constant feedback on which specific sector is being written to at any given microsecond. It simply waits for the "Success" signal from the controller.

How to Tell if DiskPart is Frozen or Working

Since "clean all" provides no progress bar, users often think their computer has crashed. Here is how to verify the status:

The Task Manager Method

1. Right-click the Taskbar and select Task Manager.

2. Go to the Performance tab.

3. Click on the Disk that you are cleaning.

4. Look at the Active Time. If it is at 99% or 100%, DiskPart is working.

5. Look at the Write Speed. If you see a constant stream of data (e.g., 110 MB/s), the process is moving. If it stays at 0 KB/s for more than 10 minutes, the process is likely stuck due to a hardware failure.

What to Do If You Need to Cancel "Clean All"

If you realize the "clean all" command is going to take 15 hours and you need to leave with your laptop, you can cancel it. You can do this by closing the Command Prompt window or pressing Ctrl + C.

The Consequences of Canceling:

• The disk will be left in an uninitialized state. You will see it as "Disk Unknown, Not Initialized" in Disk Management.
• The data that was already overwritten is gone forever.
• The data that hadn't been reached yet is technically still there but inaccessible because the partition table was destroyed at the start.

The Recovery Solution:

If you canceled a clean command and need to get back the data that wasn't overwritten yet, this is the time to use MyRecover. Because the clean all command writes sequentially (from the beginning of the disk to the end), if you stop it at 10%, the remaining 90% of your data might still be intact. MyRecover can scan the disk and find those orphaned files.

Step-by-Step: How to Run Clean All Correctly

To ensure the process goes as quickly as possible, follow these steps:

1. Preparation: Plug your laptop into a power source. Ensure external drives are connected to the fastest available port.

2. Open Admin CMD: Press Win + X and select Command Prompt (Admin) or Windows Terminal (Admin).

3. Enter DiskPart: Type DiskPart and hit Enter.

4. Identify Disk: Type list disk. Take note of the disk number (size is the best indicator).

5. Select Disk: Type select disk X (where X is your drive number).

6. Run Command: Type clean all and hit Enter.

7. Wait: Now, simply wait. Based on our guide, you should now have a good idea of whether you have a 30-minute or a 5-hour wait ahead of you.

Final Thoughts

The "clean all" command is the most thorough way to wipe a drive using native Windows tools. While the answer to "how long does clean all take in DiskPart" varies, most users should expect a wait of about one hour per 300GB of HDD space or one hour per 1TB of SSD space.

Before you begin, always ensure you have backed up your data. If you find yourself in a situation where a disk was cleaned by mistake, remember that tools like MyRecover are your best chance at reversing the damage—provided you didn't let the "clean all" command finish its long journey to the very last sector.

Frequently Asked Questions (FAQ)

1. How long does clean all DiskPart take for a 2TB hard drive?

On a standard internal 7200 RPM HDD, it typically takes 5 to 7 hours. If the drive is connected via USB 2.0, this time can jump to over 20 hours.

2. Can I recover data after running the "clean" command?

Yes. Since the clean command only deletes the partition table and not the actual data, you can use a tool like MyRecover to scan the unallocated space and restore your lost partitions and files quickly.

3. What happens if I accidentally stop the "clean all" process mid-way?

The drive will be unusable until you re-initialize it. Any data in the sectors that were already processed is permanently deleted. However, for the sectors not yet reached, you can attempt to rescue the data using MyRecover before you format the drive again.

4. Is "clean all" harmful to my SSD's lifespan?

While "clean all" performs a full drive write, modern SSDs have high TBW (Total Bytes Written) ratings. Running this command once or twice will not significantly impact the life of your SSD. However, for regular wiping, an SSD "Secure Erase" via the manufacturer's software is more efficient.

5. Why is my "clean all" taking much longer than 4 hours for a 1TB drive?

This usually indicates a bottleneck. Check if you are using a USB 2.0 port, or if the drive has physical damage (bad sectors). If the write speed in Task Manager is extremely low (under 10 MB/s), the drive may be failing.

6. Can I use my computer while DiskPart is cleaning a secondary drive?

Yes. You can continue to use your PC for web browsing or office work. However, avoid heavy disk-intensive tasks like gaming, video editing, or file transfers, as these will compete with DiskPart for bandwidth and extend the time the process takes.