On Fri, 25 Jul 2014 13:14:59 -0500 Schweiss, Chip wrote: > On Fri, Jul 25, 2014 at 12:04 PM, Christian Balzer <chibi at gol.com> wrote: > > > > > Well, if I read that link and the actual manual correctly, the most one > > can hope to get from this is 48Gb/s (2 mini-SAS with 4 lanes each) > > which is short of what 45 regular HDDs can dish out (or take in). > > And that's ignoring the the inherent deficiencies when dealing with > > port expanders. > > > > > Actually the limit is 96Gb/s The front and back have independent SAS > expanders. There are 4 internal to external mini-SAS cables. > If you read the section E of the manual closely and stare at the back of the case you will see that while there are indeed 4 external SAS connectors right next to the power supply, only 2 of those are inbound (upstream, HBA) and the other 2 outbound, downstream ones. So my number stands, 4 lanes at 6Gb/s times 2 = 48Gb/s. Which also means that if one were to put faster drives in there, the backside with slightly more bandwidth would be the preferred location. Christian -- Christian Balzer Network/Systems Engineer chibi at gol.com Global OnLine Japan/Fusion Communications http://www.gol.com/
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