I run a WNR3500L behind a Speedport 723V router. Speedport router are OEM devices which are distributed by my provider. On this router, a closed source software is used (no IPv6, poor user interface, …). For me a reason to use more of a WNR3500L and Tomato. I use as the Speeport as a DSL modem. The should do the WNR-3500L with Tomato. That's it;).
But the lousy USB performance of the WNR3500 with Tomato is a thorn in the eye. I know a router is not a NAS and the WNR most USB doing things with the CPU. How could this scenario be explained;
I hang a USB drive with NTFS file system on the router.
Speedport: ~ 5MB/s read and write 3MB/s
WNR3500L: not worth talking about - simply unusable.
Read performance is lower than the write performance.
The ext2 file system or ftp are not much better.
I created a video where I copy files via smb / ftp from the router to the PC.
What is striking is clear that the WNR-3500L worse than writing is reading from USB.
Is it normal that even the SMB or FTP Daemon need as much CPU power? Even a simple cp or cat to /dev/null use ~ 70% power.
Or is a WNR3500L with its 450Mhz too weak?
I have seen here and there already some forum posts about USB drives and performance. But I think that this behavior is just not normal.