[OpenIndiana-discuss] Comstar Fibre Channel Target

[Mark]

Does anyone have experience with Comstar as a Fibre Channel Target ?

I build one some years ago, which ran really well, but my latest effort 
is disappointing.

Throughput is abysmal, only reaching about 20 Mbytes/sec depending on 
block size.

Zpool is raidz with 30 x 4Tb SAS disk attached to a 6G SAS IT controller.
Local disk throughput reaches over 400 Mbytes/sec.


The Initiator is Windows 2012 with Qlogic 8G adapter, and Qlogic 4G at 
the OI end, with straight cable.

It works, no errors I can find, but performance just sucks.

In desperation, I'm about to try swapping the Qlogic for an Emulex HBA.

Can anyone offer suggestions on identifying possible causes ?

Mark.