I'm having a time trying to figure out what the largest RDM disk is that I can create for a VM. At first, I created a 2.8tb volume on the san, and of course when I tried to add it, it was rejected saying that the vmdk is larger than the maximum size supported by the datastore. So, I double-checked the datastore settings, and with some reading found that using an 8MB block size for your datastore should allow a maximum RDM of 2tb. At that point I deleted the datastore, created it with 8MB block size (total size of the datastore is 56gb), and resized the RDM to 2tb. I went back to readd the RDM and I still get the error that it is too big for the datastore.
So, what's the biggest I can use here? I really want at least a 2tb volume, as this is for a storage NAS I'm building. Seems silly that if you're using an RDM you're limited to the datastore that the machine is running on. I understand why, but still seems silly.
Anyways, if anyone can help I'd appreciate it. Thanks!