AHCI (vmw_ahci) performance issue resolved in ESXi 6.5 Update 1

For customers who had SATA controllers that consumed the VMware Advanced Host Controller Interface (AHCI) driver found that after upgrading to ESXi 6.5, the disk performance for those devices were significantly impacted. Basic operations such as cloning or uploading an OVF/OVA would literally double if not triple in time. In fact, I too had observed […]

ESXi 5.5 introduces a new Native Device Driver Architecture Part 2

Following up from Part 1 where I provided an overview of the new Native Device Driver architecture introduced in ESXi 5.5, we will now take a deeper look at how this new device driver model works in ESXi. A new concept of driver priority loading is introduced with the Native Device Driver model and the […]

ESXi 5.5 introduces a new Native Device Driver Architecture Part 1

With a new release of vSphere, many of us are excited about all the new features that we can see and touch. However, what you may or may not notice are some of the new features and enhancements that VMware Engineering has made to the underlying vSphere platform to continue making it better, faster and […]