Iscsi 10Gb and performance

Fast Ethernet is 100Mb/s throughput

12 MB/s speed (theorhetical)

Gig Ethernet is 1000Mb/s throughput

125 MB/s speed (theorhetical)

10 Gig Ethernet is 10,000Mb/s throughput

1250 MB/s speed (theorhetical)

Pratically on  ISCSI 10 Gig the throughput is 300-500 MBps it is very good.