TLDR: wasted whole afternoon because of windows update. Thanks microsoft EDIT: Please disregard. It seems there are some windows updates that must do something for this issue. My colleague just called me as I posted this message and informed me after running updates and reformatting the iscsi volume, Veeam is behaving as it should.
So just leaving this information here for anyone who runs into this unusual issue.
I'm currently trying to test the new REFS functions from 9.5 on server 2016 but having some issues.
Our lab setup for this is as follow:
Fresh install of server 2016 datacenter on a VMWare 6.0U2 host.
10 TB volume on a Synology NAS presented to Windows directly via iSCSI (bypassing vmware).
Synology block size is 64K and so is our REFS block size when formatting.
We tried both a direct partition (windows disk manager -> format REFS), as well as creating a storage space with the single volume also formatted REFS.
Veeam 9.5 sees the storage fine but the 2 big signs that REFS is not being detected properly are being shown:
1) the "align blocks" option is NOT ticked and greyed out
2) when completing the setup of the repo, it says "specified volume does nto support fast cloning API. proceed anyways?"
The veeam install is on a trial licence so I think everything is unlocked, though I think the REFS functions work on every version?
Is there something wrong in this setup?