On 13/04/13 02:49, Greg Freemyer wrote:
On Fri, Apr 12, 2013 at 9:36 AM, Greg Freemyer <greg.freemyer@gmail.com> wrote:
OK , taking all this into account, what can be wrong at *my* end, in my
system, which could cause such a speed difference?
BC Basil,
I have to copy 500 GB of data from ntfs to ntfs via usb3 today.
I will use opensuse 12.3 this time.
Separately, ntfs has a auto-document indexing feature. I keep it disabled by default. Do you know if you have it enabled? I think a vanilla mkfs.ntfs has it enabled. There is a flag to disable it. I did not think opensuse even had support for that ntfs feature, but it is one of the few issues I can imagine it being.
Greg
I had no speed issues with OS 12.3 either, so both OS 12.2 and 12.3 seem fine to me. ie. 90 MB/sec reading from NTFS USB-3 and writing to NTFS USB-3 via a simple cp -a command.
This is with different disks, cables and laptop from what I did yesterday. (Yesterday was a 12 month old HP laptop. Today was a 18-month old Dell Laptop. Both have native / built-in USB-3 support for at least 2 ports.)
Both yesterday and today, I was copying 1.4GB files. Yesterday I did about 1 TB, today turned out to only be 80 GB, but still big enough to be a good test.
Basil, since you're willing to reformat the drive, try to format it with:
mkfs.ntfs --no-indexing --fast /dev/sdb1 (Or whatever your device is).
OK, Time out! Stop the clock! Yesterday I did NOT do the above - reformat the drive(s) with the above cli but what I *did* do is to: a) hook up the *second* external HDD formatted in ntfs, and transferred the "test" file of 7,631,404,437 bytes to it from the internal SATA3 HDD partition which is formatted in ntfs - the transfer rate was the usual ~27MB/s; b) I then emulated what you did which was to cp that file from one external USB3 HDD to the other USB3 HDD using the SystemRescueCD and got a transfer rate of 109.0MB/s. Now, I simply do not understand any of this nor have an explanation for this - except to say that before I did the above test there were some updates made to the 12.3 - but this should not have anything to do with it because I used SystemRescueCD which is using a different version of the kernel and the 12.3 OS doesn't have anything to do with the copying processing - or those it? I really don't know. [pruned] BC -- Using openSUSE 12.3 x86_64 KDE 4.10.2 & kernel 3.8.7-1 on a system with- AMD FX 8-core 3.6/4.2GHz processor 16GB PC14900/1866MHz Quad Channel Corsair "Vengeance" RAM Gigabyte AMD3+ m/board; Gigabyte nVidia GTX550Ti 1GB DDR5 GPU -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org