In our testing the bottleneck has not been the disks thrashing as you suggest for three reasons - the disk-activity meter is rather low when we are hitting this limit (~20% active at most), we've tried load balancing policies that only utilize one path, and it also happens on a sync from box to box ...

Well we got in some different Gb NICs to try out for the sync channel. When first running the sync test and Wireshark, I did notice some CRC errors being generated. After disabling TCP offload, and re-running it, the packet trace looked perfectly normal - no oddities. Unfortunately, we were still hi...

In checking that I had the newest drivers for our NICs, I noticed that although branded HP, the actual chipset on the NIC is made by Intel; specifically Intel E1E. I did confirm that we are running the latest drivers for that NIC, as I suspected. Later this week I have some other NICs coming in that...

This is also something we are experiencing. Almost exactly the same speed: ~30% of a 1Gb link (35-40 MB/s). This kills performance for writes to the SAN. I'm also able to completely peg the line with iperf and a SMB file transfer. It's only an issue in an HA setup - in single node configuration or w...