Strange network copy speeds.

C

Copyright

Supreme [H]ardness
Joined
Nov 17, 2000
Messages
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I finally had my setup transferring files nearly 80mb/s and peaking 100mb/s. My last wifi card even tho connected at a good speed would not go over 30mb/s.. like it was capped. I recently reloaded my PC with a fresh copy of windows. Loaded the drivers I used last time and now all of a sudden I am capped at 30mb/s again. I then tried copying a different file from my media box to my PC and it was getting 99/mbs.. I thought strange.. deleted the file on the the media box and copied it back up at 100mb/s... OK..so I go to move another folder and back to 30mb/s... I tried to copy just the contents of that folder and got 30mb/s... why are some files copying at what I feel is full speed (nearly 100mb/s) and others just hang at 30mb/s?

I am on an Edgerouter with Ubiquiti 8port POE 150w switch and Dual Ubiquiti AC HD access points. Media box is hard wired. My PC is on wifi. The issue is consistent ... and really strange. I do have the AP's setup to use link aggregation but I don't think that is the problem as I have seen this before with my old Asus router. It's almost like a permission or ownership issue.. I am super lost.
 
Just glancing at your sig, is there a possibility that the lower speed files are coming from the WD Red and the faster speed files are on your SSD? I just want to be clear on one of the statements... you say you tried copying a different "file", then you later you go to "move another folder". Can you be more specific? Are you interchangeably using the words "file" and "folder"? Are you testing with two different large files? Is the folder full of small files? All these things can affect overall speed. For example, a thousand smaller files on a physical hard disk will slow things down due to having to physically seek to the sector for the small file, then physically go to the next, etc. Although, I don't believe that those reasons should cause the speed to be 30 mbps "slow"...
 
I tested file and folder.. I started to think the same thing.. but even the RED should be capable of faster than 30mb/s transfer speeds. Both were large single files. Super strange. I was thinking the same thing.. if it was a lot of tiny files it could drag the speed down but not the case. I am trying to get a hardwire down to this PC from upstairs.. I finally found a path through a closet down upstairs that is above my office and shares a wall. Will see if it changes after I hardwire it.
 
Most wifi setups will show a lower speed from the wifi pc to the router/access port simply because the antenna power transmitting from the wifi pc when it is the source is lower than the antenna power transmitting from the router/access point when that is the source. So you should not expect the same speed in both directions unless the antennas are the same on both ends.
 
Maybe give an external 3rd party tool a try. Might get you an idea of what's right or wrong. This looks like a decent video for a well known tool, iperf

 
Last edited:
dwd999 said:
Most wifi setups will show a lower speed from the wifi pc to the router/access port simply because the antenna power transmitting from the wifi pc when it is the source is lower than the antenna power transmitting from the router/access point when that is the source. So you should not expect the same speed in both directions unless the antennas are the same on both ends.
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I don't think you understand. I can copy a file both directions really quickly... but then I have other large files that just copy slowly in both directions.
 
Copyright said:
I don't think you understand. I can copy a file both directions really quickly... but then I have other large files that just copy slowly in both directions.
Click to expand...
Sorry for my misunderstanding. Another possibility is that there is a difference in copying files that consist of uncompressed data and files that consist of compressed data.
 
I second the iperf test between media box and wireless PC. There are way too many variables here.

Also, regarding wireless, the best thing i've ever heard an engineer say in my life - "I can give you 4 or 5 reasons why it doesn't work, but I can't give you one"
 
Eickst said:
I second the iperf test between media box and wireless PC. There are way too many variables here.

Also, regarding wireless, the best thing i've ever heard an engineer say in my life - "I can give you 4 or 5 reasons why it doesn't work, but I can't give you one"
Click to expand...
I already see myself using a variant of this quote in my future
 
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