I have 2 dell power edge R620 servers and installed ESXi 5.1 in it. I thought HT would be enabled by default in this server but after installing ESXi i saw it was not enabled. I enabled HT option after installaing the OS but in vSphere client HT option is still disabled. When i checked with Dell they told HT is enabled and there is no issues on hardware side may be you can reinstall ESXi and check, if not you will have to check with VMware support.
Can someone guide me on how to enable the HT?
Thanks
Bala