With the new awesome thin provisioning GUI and more flexible virtual disk behavior (hallelujah – no more "clone/template=eagerzeroedthick”!) in vSphere, I’m getting more questions re: best practices when you have the choice of doing it at the array level or the VMware layer.
This is covered in chapter 6 of the upcoming Mastering VMware vSphere 4.0 that Scott Lowe is authoring (more here). I’ve guest authored Chapter 6 for Scott. Chapter 6 is entitled – “VMware vSphere 4.0 - Creating And Managing Storage Devices”
Read on for more details – and there’s LOTS more in the book!