---------- Forwarded Message ---------- Subject: Re: [opensuse-kde3] USB Transfer Speed Date: Wednesday 28 November 2012 From: Erik Sorenson <eriksorenson@amtelecom.net> To: Ilya Chernykh <anixxsus@gmail.com> Gave up trying to transfer a 700 mb file after 4 minutes; it had transferred only 27.6 mb using the cp command, which is the same result I fot using Konquerer file manager. Here's the strange thing. I have two partitions with genned copies of 12.2_x86/KDE3 on them --- they BOTH have the same slow USB transfer speed. But another partion, which has 12.2_x86 and Cinnamon, does the regular 6+ mb/s. The suse/cinamon partition used to have Mint 14 + Cinnamon, and it transferred at 6+ mb/s. And, as I said, Win7 goes at 6+ mb/s. All openSUSE partitions have had their OS put on with the followong general procedure: 1. do a minimal-X install off the full DVD; 2. add the repo for the desktop, i.e. KDE/KDE3 or Cinnamon 3. Add the basics of the desktop environment. I know it shouldn't differ, but it does. Does udev implementation make a difference? On Wednesday 28 November 2012 1:38:15 am you wrote:

On Wednesday 28 November 2012 10:07:46 Erik Sorenson wrote:

...

Using 12.2_x86 with KDE3, and getting 100k/sec transferring (copying) files from my HDD over a USB2 port to a USB2 flash stick. The same file transfer in Mint14_x86 Cinnamon over the same port to the same device is about 6 mb/s, and in openSUSE 12.2_x86 with Cinamon DM gives the same 6mb/sec transfer. All are separate physical partitions, not VMs.

On the same PC using Windows 7_x64, over the same port to the same device, the write speed is also 6mb/s or more. Makes no difference to all of the results if the transfer originates from an ext4 or ntfs partition, or if the flash drive is formatted fat32 or ntfs, in both Windows and Linux. The files I tested are 600mb to 1.5 gig in size.

I was surprised about the transfer speed in KDE3, as I assumed all the USB functionality came from the kernel and not the desktop manager.

Any thoughts?

Use cp command? -- To unsubscribe, e-mail: opensuse-kde3+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kde3+owner@opensuse.org