vSphere 5 issues to watch out before upgrading

Here are some vSphere 5 issues. Be aware before upgrading to vSphere 5:

ESXi 4.0 Update 2 hosts may experience a purple screen after vCenter Server is upgraded to 5.0

ESXi 5.x boot delays when configured for Software iSCSI

Update 03-11-2011 VMware released a patch that solves this problem. More information can be found here.

HP BladeSystem – Emulex be2net Inbox Driver Version Does Not Support Flex-10 or Flex Fabric Adapters on VMware ESXi 5.0 in a Virtual Connect Environment and Emulex OneConnect driver not supported on vSphere 5.0 for HP hardware

Update 02-11-2011 HP has a new firmware and driver to fix this problem. More info can be found here.

Disabling VAAI Thin Provisioning Block Space Reclamation (UNMAP) in ESXi 5.0

VMware ESXi 5.0 – Unable to Add Host to vCenter After Applying a VMware License to a Host Running the HP Custom Image for VMware ESXi 5.0

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