On 27/03/13 18:43, Per Jessen wrote:
Basil Chupin wrote:
Folks....... I thank each and all for the input so far to my question re the copying speed between to ext4 and ntfs formatted partitions.
But, honesty, none of it makes sense to me - all this talk about "user-space" and all that. It has only confused me more than I was ever confused when delving into grub and grub2. Especially this reference to "maybe USB-2 is the _next_bottleneck....". Greg mentioned it already -
"Assume your 28MB/sec performance is the fastest ntfs-3g can run on your computer. Usb-2 maxes out a little below that, so usb-2 was the bottleneck. Usb-3 is a lot faster, so now ntfs-3g is your bottleneck."
Either you are not reading what I wrote or I am not being articulate enough to explain what just happened when I used the command line command 'cp' :-( . Go to the bottom where I respond to your last para.....
Now, just to throw the spanner into what otherwise would be a very dull situation :-) , I just copied a 7.1GB file to the external Seagate's ntfs formatted partition using the stock standard cp command and this took something like ~4 minutes as against what mc took to copy a smaller file last night of ~15 minutes (working from memory here I fully admit). Any chance that the connection to your external drive is flaky? If it's throwing lots of errors and causing retries, that could explain your problem.
Yesterday I bought a brand new 2TB external Seagate HDD which uses USB3 - repeat, USB3 - and which is connected to one of the USB3 - repeat, USB3 - ports on the motherboard using a brand new USB3 cable. The HDD is also using a brand new power pack for its power source. My original post asked the question as to why I was getting different transfer rates using the above setup when copying to an ext4 formatted partition on that external Seagate compared to when doing so to a ntfs formatted partition. I provided the transfer rates as displayed in mc when using mc to do the copying. I haven't even attempted to use Dolphin to do any copying because past exeprience has shown me that it's quicker to transfer a large file using the old morse code dots and dashes than use Dolphin :-) . Earlier today, using the exactly the same setup and without any changes of any description, I copied a 7.1GB file to the ntfs formatted partition and this took around 4 minutes to do the copying versus last night's effort using mc which took around 15 minutes (actually, closer to 20 mins I think) to do a similar operation. What is missing in my explanation of the situation to keep the issue of USB2 being brought up? BC -- Using openSUSE 12.3 x86_64 with KDE 4.10.1 & kernel 3.8.4-1 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org