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Moving DAG from NTFS to ReFS

We have Two Exchange 2016 Servers running in DAG mode and have one mailbox database on both servers (40 Mailboxes). The Database are created on Drive ( NTFS). Now we are planing to add two more physical servers and stretching the environment to DR and also want to use ReFS file system.  We have following scenarios in our mind so please let us know which one is best suitable and if you guys have any other idea then please share with us.

1. Create another DAG with servers which have REFS formatted Drives, set ReFS on DAG (Set-DatabaseAvailabilityGroup NameOfYourDAG -FileSystem ReFS ). After Move mailboxes from First DAG to this DAG.

2. Add the other two members in same DAG, create new Database on new server ( ReFS formatted Drives). Move the existing DataBase to the new server drive  and then set the command   (Set-DatabaseAvailabilityGroup NameOfYourDAG -FileSystem ReFS )

Please suggest how should we need to move ahead regarding to move database or DAG from NTFS to ReFS.
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IT Architect
Distinguished Expert 2017
I assume you are aware about ReFS limitation. Like you cannot keep Exchange binary files on ReFS. In your situation, i might continue with NTFS, as mailbox count is very low. If you still want to move. I might go with Option 2. Note: I don't have lab to test, so better to test in lab first and then perform in production.

If you have option to open MS case, just open the case with MS.
Muhammad AsifSenior Solutions Architect


Yes, we are aware that Exchange binaries can not be installed on ReFS file system. I am  just curious about the Mailbox database which is already created on NTFS drives.  

If anyone have this kind of situation or knowledge to achieve the above mentioned goal then please comment.
AmitIT Architect
Distinguished Expert 2017

Any update?
Muhammad AsifSenior Solutions Architect
We have decided to go with option 1 as If we move the database from one drive to another then mailboxes database will be dismounted for time being. So we do not want to take any risk.

Using the option 1, we will simply move the mailboxes from one mailbox databse to anohter which is hosted on ReFS drives.
PberSolutions Architect

No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

-- Amit (https:#a42346057)
-- Muhammad Asif (https:#a42364002)

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