That's not high-end NAS. That's consumer level computer, and you won't get 10gb out of it.
I don't think you know what you're talking about.
If you're talking about direct attached copper SFP+ cables (Cisco calls them twinax) then those are meant to be used within a rack to connect equipment to the top of rack switch. 10m is plenty.
SFP+ itself is extremely flexible and with the correct modules can go extreme distances.
Ah, then I guess I need separate modules and cables when exceeding the magic 10m - thanks for clearing that up. I was mostly looking at direct attached cables which are available in the retail channel, and make the connection quick and easy.
And, no, I probably won't hit anything near 10gb from the start but I don't want to run into 1Gb limitations either. Given the price drop for SSDs, I might eventually put another tier of storage onto that server (provided NFS and/or Samba can cope with it --- if not, I guess I have to go the way of iSCSI et al.) by raiding a few 512GB SSDs.
Also, who knows, there may be other clients eventually too, so server-side, with a decent caching FS, there may well be peaks in excess of 1Gb.
My key point was, that 10GbE price-wise got into regions where it can not be considered an option, especially for back-haul lines between gE switches and to nodes that carry a lot of traffic.
...my interest may also be motivated by the fact, that my gE RTL chip keeps falling back to 100M mode on my server, for no discernable reason. It works for a few days, then drops. This is frustrating, and once you consider proper server grade GbE hardware, 10GbE isn't that much worse, only around three times the cost per port, once you include an SFP module.
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