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.
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