SSD on Vmware ESXI 4 (TRIM? Good Idea?)
Solution 1:
ESXi does not support trim directly as noted in the following post:
Trim on intel x25-m G2 when connected by iscsi
There are examples of people using SSD drives on ESX(i) systems, though. My question for you is if you have the ability to actually run with more traditional SAS drives? You could probably support your VM load on 6 drives in a RAID 1+0 setup with 15k drives and a write-caching controller. Are there some other limitations that you're not sharing here?