Windows 10: Disk Defrag Slow

I'm trying to defrag an external 4TB HDD. It's been a couple hours and I'm at Pass1: 1%. Now, I know 4TB is a lot, but at this rate it will take all week to get through pass 1. Maybe it won't be linear or defragging is just really hard work for some reason, so I check my task manager and I see:

Microsoft Drive Optimizer: 0% CPU, 1.4MB RAM, 0 MB/s disk

Service Host: Disk Defragmenter: 0.1% CPU, 4.4MB RAM, 0.1MB/s disk

System: 0.5% CPU, 0.1MB RAM, 0.5 MB/s disk


I don't see anything else related or using much CPU or RAM. So why is disk defrag not using the available resources?

:)

 

disk defragmenting

Sign in to your Windows 10 computer with an administrator account. It is important to use an administrator account because standard account holders cannot defrag the hard disk drive.

Click the Start button.

From the left pane of the Start menu, click File Explorer.

On the opened window, from the navigation pane in the left, expand the This PC tree.

From the expanded list, right-click Local Disk (C: ) or any other partition on which Windows 10 is installed.

From the context menu, click Properties.

On the opened Local Disk (C: ) Properties box, go to the Tools tab.

From the displayed interface, under the Optimize and defragment drive section, click the Optimize button.

On the Optimize Drives box, from the displayed list, ensure that the system drive (C: in this example) is selected.

Click the Analyze button from below the list.

Wait until Windows completes the analysis and displays the percentage of the fragmented files in the selected drive.

Note: If there are no fragmented files in the drive, Windows displays a message box stating that the disk does not need to be defragmented.

After Windows completes the analysis, click the Optimize button to start the defragmentation process on the selected volume.

Wait until Windows defragments the drive successfully, restart the PC, and start using Windows 10 normally.

 

hard disk D won't defragment

Hi,





File corruption is one of the reasons why you are having challenges defragmenting your hard disk. Before we proceed, we need you to answer the following questions:

• Are you defragmenting an internal drive or an external drive?
• Are you using the Windows defragmenter to defrag your hard disk, or is it a third party software?

In the meantime, you can run the System File Checker tool. This will helps use scan and restore corrupted files. Here’s an
article that will walk you through the steps on how to run the System
File Checker tool, how to view details of the System File Checker process, and how to manually replace corrupted system files.



We will be waiting for your response.

 

defrag

Hi Kim,

It is important to use an administrator account because standard account holders
cannot defrag the hard disk drive. We would like to ask for additional information. Please provide the following:

• Which build of Windows 10 are you using? To know about it, hit
  Start, type Winver and then press
  Enter. You could also press Windows Key + R, type
  Winver into the
  Run dialog and press Enter.
• Are you using the administrator account on your computer or a Microsoft/guest account?
• Were there any changes made on your computer prior to the issue?
• Since you've mentioned that it refuses to defrag, can you please provide us with a screenshot of it? You may refer to this
  
  link on how to include a screenshot in your post.

Moreover, we recommend that you use the administrator account registered on your computer the defrag it. To optimize them:

• Select the search bar on the taskbar and enter defrag.

• Select Defragment and Optimize Drives.

• Select the disk drive you want to optimize.

• Select the Optimize button.

Looking forward to the requested information and the results of the recommended troubleshooting steps.