We have a Dell m1000e enclosure that is filled with 8 Dell M710 blade servers.
4 of the blades are running ESX 4.0 u1. The fans associated with those blades run quietly. The 4 other blades which we have have configured to run under ESXi 4.1u1 run like there is no OS on those blades (they are loud).
What are we missing in getting those blades running ESXi 4.1u1 to run like the older ESX 4.0 blades rather than sounding like they would when starting them up all of the time. They ran quietly when they ran ESX 4.0u1?