total speed of a dual fibre card QLA2342 aka SG-XPCI2FC-QF2 aka X6768A aka 375-3108

From: Andrey Dmitriev (admitriev@mentora.com)
Date: Wed Aug 29 2007 - 11:40:44 EDT


All,

We have a dual fibre card. When tested per single port, the card seems
to go close to wire speed to a single LUN.

We were hoping to get 4Gps by connecting 2 LUNs on 2 separate ports and
2 separates controllers on the disk array, however, we are still getting
speeds close to 2Gps.

The file system we used was ZFS, and we just added both LUNs to it (on
different controllers)

The setup is as follows

hostFibrePort0->switchA->arrayController0port0

hostFibrePort1->switchB->arrayController1port1

The array is satabeast with 4gb ports. The switch and the fibre card are
2gb.

So basically the question is, is the card the bottleneck? Should it be
able to do 4gb combined?

-andrey

p.s.

I wish Sun stuck to a single part naming convention.
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