-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wednesday, 2013-03-27 at 22:45 +1100, Basil Chupin wrote:
I used a stopwatch to check how long it took to copy a file to (a) a partition formatted in ntfs on an external USB3 HDD and (b) how long to copy to the same HDD but to a partition formatted in ext4.
I copied a 11.437GB file to the ntfs partition using 3 methods and the results were:
1. copy using cp command................. 4 min 59.1 sec
2. copy using mc................................ 6 min 29.3 sec
3. copy using Dolphin......................... 5 min 13 sec
Then I copied the same file to the ext4 formatted partition and the results were:
1. using cp command....................... 2 min 17.3 sec
2. using mc...................................... 2 min 18.1 sec
3. using Dolphin............................... 2 min 18.2 sec
The results are not surprising at all. It is about what I expected. Or we executed, most of all have told you about the same things :-) It is very simple: writing files on ntfs on Linux is slow because it uses more cpu. It does not matter to you why exactly - if it does matter, then try to understand all that talk about userspace vs kernelspace and single-double-triple buffering and reverse-engineering. Why different copy programs behave differently means that they do the copy differently. We would need a dev looking at the code to learn why some are more affected than others by this operation. It is curious, though. Repeat the above test having in another terminal "top" running and see what it shows...
What is missing in my explanation of the situation to keep the issue of USB2 being brought up?
Somewhere you mentioned that you did not have/see this issue when you used USB2 or some similar words. We said that using USB2, as it is slow itself, you do not hit the problem that you see in your table of ntfs-3g being slow. - -- Cheers, Carlos E. R. (from 12.1 x86_64 "Asparagus" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) iEYEARECAAYFAlFTlmkACgkQtTMYHG2NR9XrJwCfZ2z/qTjGCmjaXvE6mZOnkoxK E/MAnRFzok4x9UtAXWfdjc8pezwqo3LC =XiL+ -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org