Hi Mike,
My first suggestion would be to upgrade your system to VL270R001-01. There were some enhancements in VL270 that will allow you to enbale overcommit when using snapshots.
My advise would be to carefully manage your space when using snaps. There will be a trade off with allowing the snap space to grow and consume more of the free space on your pool. Be sure you are monitoring the growth of the snap space so that it does not consume too much of the free space on your pool.
You stated that VMware stopped. This may be due to the capacity of the 8TB volume being full so that VMware does not have enough free space left to boot. You should review the currently allocated size of your volumes and consider the space of your snapshots so that you do not get into an allocated space conflict.
Hope this helps!
Cheers,
Shawn
I work for Hewlett Packard Enterprise. The comments in this post are my own and do not represent an official reply from HPE. No warranty or guarantees of any kind are expressed in my reply.
