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RT N66U CPU 100% with attached USB Drive???

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RSwipeCA

Occasional Visitor
Hi all. Here's my issue.

For the past 18 months or so my RTN66U has been performing faultlessly. We have multiple wireless and wired devices in the house, and never have had an issue. About a year ago I attached a USB HDD to the USB port on the router. It's full of movie files. It has all been working perfect for ages. I can stream from the attached USB drive to PS3, pc or smart tv no problem. 1080p files are perfect. I can see the attached USB drive on all my pc's, and read and write to the drive no problem.

Over the past few weeks, we have had our net connectivity dropping out at different times. We'd be watching netflix for instance and the connection would die.

I started to check all the usual things like firmware, physical connection, virus, various reboots and resets. And it would be good for a day or so, then the net would become very slow, almost to the point of unusable. I also notice that trying to log into the RTN66U GUI would take ages.

I also noticed that the CPU usage report on the router was at 100% constantly, and the RAM usage was at least 50% or more when the router was essentially idle????? That's when noticed that if I removed the USB HDD from the back of the router the net connection would return, and the CPU Usage would return to 1% and the RAM usage to say 15%?? So I formatted the HDD as a precaution ( NTFS - as it was from day one ), and then copied over almost a TB of video files again. Mounted the HDD in the RTN66U and the moment I did that the CPU and RAM usage went through the roof again. As far as I can tell the HDD is working perfectly. It connects to my W7 pc no problem, all the files are there and it serves the movie perfectly. I was on the phone with ASUS and they asked me connect a different USB drive to the router. I had a 16GB thumb drive. Stuck that in and again the same issue - CPU goes straight to 100% Usage, and RAM usage increases to 75%!!??? All this was working perfect for over a year?? This is a great router, and even with this irritating glitch at the moment, it is still blazing fast and copes with everything the six of us in this house can throw at it.

Does anyone have any ideas? I really do like having the USB Movie HDD attached to the router, it means I can stream to whatever I want whenever I like, without having to leave a pc on. If its developed a fault then so be it.

It was running the 282 1071 firmware with the issue. I tried the Merlin firmware - no difference. Its now running the latest 376 2524 Asus firmware - still has the issue.

Any help would be greatly appreciated.
 
The same symptoms

I have a Asus RT-n66u with the same symptoms.
For some time now my n66u is with the CPU at 100% and memory at 75%. When disconnect the HHD everything returns to normal. Tried different HDD´s with different file system with the same result. The router is very slow now.
In the past it was ok, but now....it is very slow.
 

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