In response to Zhou's comment, you should by no means increase these values on your own.
When AVE is initially installed, not all the capacity is automatically given over to the gsan. What is meant to happen is that the system is given a health check by either support or professional services and only if the AVE is performing at an acceptable level is this increased to the maximum of 1TB or some portion there of.
Antoine, you will we had topic on this matter before. With latest version, you can use AVE up to 2TB I believe... if sizing would show that is the way to go. If not, then AVE is out of scope and you will need real box.