Sorry for replying late. I was out of town for a while.
Ideally, you should add disks from ESXi1 as well.
You can try changing the Virtual SAN Default Storage Policy and see if that helps.
Changing the default policy settings (Not recommended for production):
1) Go to Home > Policies and Profiles > VM Storage Policies
2) Edit Virtual SAN Default Storage Policy and make Force Provisioning "Yes". Click OK and try creating files on VSAN datastore.
If Force Provisioning does not help, change the "Number of failures to tolerate" to "0" (zero).
Hope this helps you to make it working.
Cheers!
-Shivam