Hardware specific WIFI file transfer corruption

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saphier

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Jun 17, 2014
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4,510
Hi all,

Can't seem to pin down this problem. I have a USB Wireless N adapter (DWA-160 Rev B2). I can't download files onto the computer without the file becoming corrupt - the MD5 signature of the transferred file will no longer match the original.

This only occurs when I'm downloading files from a remote server to the PC - transferring is fine. It also only occurs with the DWA-160 B2, I have tried another 5ghz adapter on the 5ghz band, on the same computer, and the same USB port and it works fine.

The same adapter works fine on two other Windows computer (Windows 7 and 8.1).

I have tried it with the default Windows drivers, with the updated drivers, and drivers in-between the two and none have produced any different results.

I have also scanned my computer files using sfc /scannow and everything verified.

Not sure what else I can try, but am certainly open to suggestions!

Specs: i7 3770k Z77 FTW 8gb ram D-Link DWA-160 B2

Network specs: Linksys E4200 running DD-WRT, USB D-Link connected through 5ghz wifi with 2.4ghz wifi radio disabled (full signal).
 
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saphier

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Jun 17, 2014
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Yes, same issue with that adapter on either band.
 
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bill001g

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Aug 9, 2012
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It is not related to the radio band or the channels or anything even close to that. Wireless retransmits data until it gets a clean copy of the data or it eventually drops the packet and is dependent on the application to retransmit it. The retransmission part is deeply buried in the firmware loaded to the nic card...this is part of the driver actually loaded and executes on the wireless radio chip itself. Normally I would say load different drivers but you have tried that. The other place is in the application that accepts the data from the wireless and writes it to the disk but if it works with other nics then you would think the problem can not be in the application.

I suspect your only option is going to be to try to find a way to completely remove the current driver and be sure you load one you know works on a different machine. Windows is such a pain it will say it removed stuff but really doesn't.

You may get to the point that spending $20 on a new nic is less painful than the hassle of figuring out what has gone wrong.
 
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saphier

Reputable
Jun 17, 2014
7
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4,510


I should also add that small files are fine. But files that are 300mb and above will corrupt such that the file signatures no longer matches.

For now I have taken your solution and simply have another network adapter attached to the computer (which has its own set of connectivity issues). Will see about trying to remove the driver completely from Windows.
 
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bill001g

Titan
Aug 9, 2012
28,362
2,766
125,640
Since it works fine on other machines and other wifi adapters do not cause the problem it is likely not the wifi signal. Besides the wifi is suppose to correct any errors. Any bad memory issue would affect other adapters also. This has to be some strange software problem related to running that particular brand of wifi card on that particular machine.
 
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