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KDE is an international technology team creating user-friendly free and open source software for desktop and portable computing. KDE’s software runs on GNU/Linux, BSD and other operating systems, including Windows.

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Does KDE makes file transfers between hard drives slower? My laptop is too slow when copying files to my usb flash drive. (programming.dev)

submitted 8 months ago by [email protected] to c/[email protected]

10 comments fedilink hide all child comments

I have two laptops, I'll call them laptop 1 and laptop 2.

Laptop 1 is my gaming laptop, and laptop 2 is a very low-spec one that I use as a jellyfin server. Here's the neofetch result for both of them:

Laptop 1

Laptop 2

The problem

On both of them, I copied a 5GB folder from the laptop to my 3.0 usb flash drive, I used this rsync command on each:

rsync -a --progress folder_path destination_folder_path

Laptop	Average transfer speed
Laptop 1	9MB/s
Laptop 2	45MB/s

How is this possible? The Laptop 1 is way superior than laptop 2. The laptop 1 has an nvme SSD while laptop 2 has an old 320GB HDD, yet the transfer speed difference is insane.

Does KDE affect the folder copying somehow? If I copy a file on the same SSD on laptop 1, the speed reaches more than 400MB/s.

What is going on here?

all 14 comments

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[–] [email protected] 10 points 8 months ago (3 children)

My guess is that laptop 1 is connected to the HD through USB2 not USB3. Or u r using USB hub

[–] [email protected] 3 points 8 months ago

Laptop 2 only supports USB2 according to this page.

[–] [email protected] 1 points 8 months ago* (last edited 8 months ago) (2 children)

I'm not using a USB hub. How can I confirm that the usb port is indeed a 3.0 one? Is the color blue of the port enough?

[–] [email protected] 6 points 8 months ago* (last edited 8 months ago) (1 children)

It's hard to be completely sure with USB. I think if you can identify the controller, you should be reasonably sure it's actually USB 3 (but then you've got the various flavours of USB 3).

You can browse the output of lspci which should tell you the capabilities of your controllers. In theory.

[–] [email protected] 1 points 8 months ago

Am easy option is to check the output of lsusb and check which bus the storage device shows up on. Device 1 on each bus is the controller which will show as usb1/2/3, with every other device on that bus running at that speed.

[–] [email protected] 3 points 8 months ago

USB 3.0 has additional contacts.

[–] [email protected] 6 points 8 months ago (1 children)

It’s almost definitely not KDE. But we can’t know what it is with the information you’ve given us. We can speculate, and that’s about it.

[–] [email protected] 1 points 8 months ago

Speculating is great for troubleshooting. Every time someone speculates a possible cause, it’s possible to devise a way to test it. It’s called hypothesising. Each tested hypothesis, regardless of the actual results, helps to further the understanding of the problem.