is this normal iSCSI read speeds? local disk read speeds is just a stable and flat line, is it possible to achieve a stable read speeds on open-e as well?

Hardware (Open-E) - PowerEdge 2850 - 6 x 146GB scsi drives, GigE NIC (single port connected- will be bonded later)
Connected to HP 2824 switch (no flow control or jumbo frames enabled yet)

VIRTUAL MACHINE # 1 results

TEST#1


TEST#2


TEST#3



Tested using HD Tach, ran at the same time.