MSMSMSMSMS wrote:Although following problem is not directly related to ReFS cluster size, it is still Veeam/ReFS related, so I am mentioning it here. Veeam doesn't have ReFS equivalent to their NTFS BitLooker technology, so it is backing up dirty ReFS blocks. We are seeing that our Exchange VM's with ReFS volumes, have backups that are almost twice the size of data that is visible on file system. E.g. our databases + OS is 8 TB, our Veeam full backup is 16 TB.