Product : Citrix, XenServer/7.3, Enterprise
Feature : Max Disk Size, Storage, Network and Storage
Content Owner:  Roman Macek
Summary
2TB
Details
For XenServer 7.3 the maximum virtual disk sizes are:
- NFS: 2TB minus 4GB
- LVM (block): 2TB minus 4 GB
Reference: http://bit.ly/2rcrjZx