vSphere 5.5 – what’s new – ESXi

Hypervisor enhencments

  • Hot-Pluggable SSD devices – since SSD devices are more and more popular in ESXi deployments in vSphere 5.5 one can change SSD drive while vSphere host is running (same as SATA or SAS hard disk)
  • Support for Reliable Memory Technology – because VMkernel runs directly in memory an error in memory module can potentially crash ESXi server and virtual machines on it. RMT is a CPU build technology which reports from the hardware to vSphere ESXi host which region in memory is “reliable”. New HP G8 servers supports RMT.


  • Enhancements to CPU C-States – long story short – better power saving support – I was always wondering who actually using power saving features in vSphere environments ?

Artur Krzywdzinski

Artur is Consulting Architect at Nutanix. He has been using, designing and deploying VMware based solutions since 2005 and Microsoft since 2012. He specialize in designing and implementing private and hybrid cloud solution based on VMware and Microsoft software stacks, datacenter migrations and transformation, disaster avoidance. Artur holds VMware Certified Design Expert certification (VCDX #077).