I was able to install Windows Server 2008 R2 without a problem (which requires 64 bit) on an IBM xSeries 366 server. But I also found out the x366 doesn't support HAV so adding the Hyper-V role is out.
I saw that the x366 is in the HCL for VMWare's ESXi and it installed/configured without a glitch.
I tried to export a Win 2008 R2 virtual from workstation into ESXi which was going fine right up until the step where it starts moving the virtual disk to the server. At that point i was greeted with an error that it couldn't migrate x64 to x32.
I tried to create a new virtual machine in ESXi and selected Windows Server 2008 R2. When it booted from the iso I was greeted with an error that x64 can't install on x32 hardware.
So, I'm trying to figure out if I've done something wrong or if x64 guest support just simply isn't available in that box? I've tried looking everywhere that I could find but am coming up empty handed for my specific instance: Will Win 2008R2 run as a VMWare ESXi guest on an IBM xSeries 366?