I just installed some Intel X540-AT2 (10GB adapters) on my mixed bunch of Dell R710-R720-R515 and was hoping my backups to go way faster. I migrated the management network switch to this new NIC and the traffic all goes through it as well, teh 1GB cards have been un assigned.
For my surprise the copies and everything else like trying to copy of replicate a VM across always says network as bottleneck, and Indeed the speeds are no more than 70MB sec, even with low compression, CPU usage is very low. I don't know what is really wrong, I got 2 hosts with latest 5.5 U2 ESXi installed, but the problem seems the same across the board. I even tried to backup to some Samsung 845DC PRO to make sure it was not storage bottle neck, but I still get the same (these SSDs in RAID-10 can do easily 1200MB/sec+)
What do you guys suggest I could do?