Poweredge 2900 running 2xDC Xeon, 10GB RAM, 6x7200RPM 2TB Drives, Perc6 w/512MB cache, RAID 10.

Chelsio 10GBE adapters at both ends ESX 4.1.

Currently, reads are only 150MB /sec, writes are 330/MB at 512k from inside a Windows VM. These drives in the same config will push 700MB/sec locally.

4k are 16/17 respectively.

The read writes seem backwards.....and I must be off in tuning something. I've followed the 4.1 guide and set all the params....they didn't do a thing.

Any ideas?