It seems the debate between using a VMDK on VMFS or an RDM still rages when it comes to the question which one is better for performance. The VMware team has published a lot of evidence in the past that the difference is very minor, in fact difficult...

Voici un article intéressant sur l'utilisation des RDM ou VMDK pour les datas Exchange sur VMware : La question qui revient régulièrement lorsque l’on parle de vitaliser Exchange 2010 et que le choix se porte sur l’hyperviseur de VMware vSphere, c’est...