We already managed to migrate Hyper-V VMs (more than 70 TiB) by 3rd Party Backup Softwares with 10 minutes downtimes. However there is that one dirty job to handle; 4 TiB of Mail Data which provisioned by 8 TiB LUN. Mail Server VM access this LUN by Virtual FC Adapter (vSAN).
What i plan to do is something like below. Once the Filesystem synchronization done, migrate VM via replication, apply Virtual FC settings and done.
But before applying below plan, i would like to consult to the community. I wish to minimalize down-time of mail service (Product is MailEnable). Also i have 3 weeks to solve this issue. Last resort is 8 hour downtime on weekend-midnight.
Also i would be approciate for any advice regarding rsync like tools for Windows Environments. I found this one : SyncThing (OpenSource)
Use a migration tool like Zerto for this process to minimize potential downtime.