Pienso que son beneficios adicionales, ya que no en todos los sistemas operativos se puede expandir el disco, solo cargar un disco mas adicional, expandir solo en windows server 2008.
We have been using Thin on Thin (thin disks on a thin lun) and we have not seen any problems with that. (we do use Equallogic instead of Netapp)
The only disadvantage I see, is that our EQL storage does not notice that space is freed out of the LUN.
So I don't see any reason why not to do it.
Sorry for bumping an old post but Eager thick zeroed on a thin provisioned SAN means you cannot leverage VAAI.
It depends on the SAN.
Lazy zeroed and thin on SAN takes off all CPU from ESX. The SAN does the work.
Eager zeroed and thin on SAN:this might give you some small amounts of better IO but the SAN needs to understand "zeroes" so it does not reserve the space.
Thin on Thin: you use both ressources of ESX hosts and SAN. Not recommended.
Example for a HP 3PAR found here: http://www8.hp.com/h20195/v2/GetDocument.aspx?docname=4AA4-3286ENW