Wifi download to SD by FTP very slow

jope · 11-13-04, 06:22 PM

I noticed some strange behaviour, writing data to my Kingston SD 512 MB card using Wifi.

Below the results of some tests I made on my Ipaq 4150. I downloaded data to my Ipaq using ftp and ActiveSync. In a first test i wrote to the main memory and in a second one to my SD storage card.

ftp to main: 240 KB/s
ftp to SD: 12 KB/s
activesync to main: 440 KB/s
activesync to SD: 120 KB/s

Can somebody explain why activesync is so much faster in writing to my SD card? Especially writing to SD using ftp is extremely slow. Is there a difference in the way ActiveSync is accessing the memory?

I tried different FTP clients, but always the same slow transfer rates...

Christofire · 11-14-04, 04:03 AM

If you can point me in the direction of some free ftp software I'll try it on my 4150 + SD to see what results I get.

CookieKid · 11-14-04, 04:44 AM

orneta FTP: http://orneta.com/

jope · 11-14-04, 08:46 AM

I used Slim Pocket FTP Client: http://www.pocketgear.com/software_detail.asp?id=6953
and also PIE (ftp://username

assword@ftpserver.xxx)

Kenundrum · 11-14-04, 08:54 AM

i think it may be a limitation in the wifi... although usually wifi is faster than activesync... weird

jope · 11-14-04, 11:57 AM

Quote:

Originally Posted by Kenundrum

i think it may be a limitation in the wifi... although usually wifi is faster than activesync... weird

In the tests above I used ActiveSync via Wifi.

I did an additional test via USB and it's even worse:

ftp to SD via USB: 6 KB/s
activesync to SD via USB: 125 KB/s

So I don't think Wifi is the reaon, but FTP... I guess ActiveSync uses another technique to write data on the SD card.

shields · 06-13-05, 07:18 AM

Has anyone tried SlimPocket FTP or orneta?

What are your thoughts?

imported_Roadkill · 06-17-05, 01:07 AM

Tried Slim... Can grab off my server @ over 220 KB\s to the ipaq filestore. To SD it maxed around 90 KB/s.

Also tried Resco Explorers FTP plugin... It was slow... 32 KB/s max to filestore. 16 KB/s to SD.

Looks like speeds are very protocol dependant.

When I use Resco Explorer and a mapped Network drive I download @ 264 KB/s to the SD and the same to the file store...

FTP needs an overhaul.

Hardware is a 4150 and a 1 GB Lexar 32x.

shields · 06-18-05, 09:16 PM

Thanks -- I got Orneta going.

benn600 · 06-27-05, 11:22 PM

Not sure, but are you using the internet to download? This would explain slower FTP downloads than ActiveSync. I was able to upload to my FTP server from my SD card on my local area network (not over the net) at about 150kb/sec, but I didn't do an extremely large file nor did I really closely monitor it. That is what Resco was saying.