[Wylug-discuss] Linux NAS advice.

[James Holden]

On Mon, Jul 15, 2013 at 12:31:40PM +0100, Jim Jackson wrote:
> A word of warning about RaspberryPi - Ethernet traffic AND external
> USB disk traffic SHARE a link from the USN/Ether chip to the ARM chip, and 
> that link is HiSpeed USB 2. So if you are file serving, the data goes up 
> this link from the disk to the cpu, then back down the link from cpu to 
> ether. This link is a serious performance bottle neck. I'd search for 
> RPI USB fileserving benchmarks before committing to using the RPI for 
> anything other than trivial fileserving.

I can confirm this first hand.

The Raspberry Pi downstairs does double-duty as a backup server and RaspBMC
front-end.

The network-to-USB-disk write performance is around 1.4MB/s, but that's good
enough for me for a bit of overnight rsync.

Hopeless for anything serious though.

James

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