[PROBLEM] 300n-wifi has only 108mbps - Printable Version

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300n-wifi has only 108mbps - pix3l - 12th Jan, 2014 11:48 PM

Hi everyone,

XBian version: XBian 1.0 Beta 2
XBMC version: XBMC 12.2 (Frodo)
Overclock settings: none

RPi model (model A/B 256mb/512mb): B 512MB
SD card size and make/type: 32GB Class 10 45MB/s
Network (wireless or LAN): WiFi
Connected devices (TV, USB, network storage, etc.): USB Storage

Logile/iwconfig ouput

wlan0     IEEE 802.11bgn  ESSID:"My WiFi"  Nickname:"<WIFI@REALTEK>"
          Mode:Managed  Frequency:2.472 GHz  Access Point: AB:05:54:52:5C:D8
          Bit Rate:300 Mb/s   Sensitivity:0/0
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key:****-****-****-****-****-****-****-****   Security mode:open
          Power Management:off
          Link Quality=100/100  Signal level=48/100  Noise level=0/100
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

Problem description:
I got a CLS WiFi abgn 300Mbit/s USB adapter which worked out of the box. Although iwconfig says "Bit Rate:300 Mb/s" the speed I get when I copy files to my USB-HDD is about 1.45MB / sec. My router tells me that the Raspberry Pi is connected with 108Mbit/s (which is plausible at a speed of 1.45MB/sec.) . And yes the router is wifi-n compatible. Do I have to activate the 300MBit somehow? Do I need to install a special driver?
Has anyone real 300Mbit WiFi working on Raspberry Pi?

Thanks for your help Smile

RE: 300n-wifi has only 108mbps - Skywatch - 16th Jan, 2014 04:01 AM

Remember that 300 is the MAXIMUM speed, in real life it will be less due to interference, dropped packets and general housekeeping of the link and data integrity.

Your signal level is only 48%, so expect less than optimum throughput.

Hopefully I am wrong, but I think it's relevent.


RE: 300n-wifi has only 108mbps - IriDium - 16th Jan, 2014 04:14 AM

I have a feeling that this might be "normal" It might be a difference between the HDD and WIFI (Not the most efficient way to transfer files) See forum post of slow USB transfer.

Can you post dmesg via pastebin and the output of something like hdparm.