Puppy Linux Discussion Forum

[firak]

About writing speed of usb sped drives.

I notice that the time increase exponentially when I run moare than one file transfer instance (rox) .
I did not measure exactly, but this is my impression.
I have a slow pen drive 4 MB/sec writing.

Writing on it 1G - it takes approx 5 min.
Transferring simultaneously 3 instance of 1G, it takes aprox 30 minutes.

It is better to transfer files one by one?
How can i do it, in one command, if files are form different folders?
There is any trick suggested for rox or tux commander?


(I run a atom based netbook with macpup528 )

[8-bit]

The file transfers are buffered.
When you do a copy, buffering of one file using available memory as you say takes a certain amount of time.
The buffering is done once at the beginning of the copy.
With more than one file, the buffering is not done again for additional files on a multiple file copy.
At least that is the way I understand it.
Also, when I copy a file, I also open a terminal and type "sync".
When the prompt "#" appears again, I know the file has been copied completely.

[amigo]

First of all, using ROX to copy/move files is *way* slower than the plain CLI commands -mostly because of having to update the progress bar and display the file and folder names. You can set ROX to ignore the file names and only print the dir names, which will speed things up a bit.

But, even from the CLI, multiple operations at once will slow things down a lot. The USB bus is really slow compared to IDE/SATA interfaces. And since each segment of the copy/move has to be confirmed which involves two-way communictaion over the USB bus. Doing multiple ops at once means these to/from signals have to be scheduled. Copying is faster than moving. So, even when I really want to move the items, I simply copy them and then remove the originals when done.

[npierce]

[firak]

Yes!
My problem is confirmed by you ( amigo, 8bit , nepierce).
I test by manual command and is faster. I test it!
Im not used to the command console,
but is ok.
I open console in a source folder
cp sourecefile(tabcanhelp) space /mnt/sdc1 ; sourecefile2(tabcanhelp) space /mnt/sdc1 ; sourecefile3(tabcanhelp) space /mnt/sdc1

for copying entere folders:

[Flash]

I used

[Monsie]

[Flash]

Thanks, it does look like this post could have the solution I'm looking for.
Ditto for this post about rsync, which Puppy also has.
So I tried