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Disk distribution in S2D

    Question

  • Dear Sirs,

    Your advice is appreciated as I need to better understand the disk distribution required to run an S2D environment.

    Would a 2x NVMe (capacity) + 2 x 300GB SAS (OS/hypervisor) scenario be acceptable?

    I heard a quorum disk is needed, is that mandatory? does it have to be of a specific disk type?

    Is there a document that explains these things in more details?

    Thank you.

    Alain.

    Friday, December 1, 2017 11:21 AM

All replies

  • https://docs.microsoft.com/en-us/windows-server/storage/storage-spaces/storage-spaces-direct-hardware-requirements explains the hardware requirements.

    https://technet.microsoft.com/en-us/library/hh831739(v=ws.11).aspx gives an overview.

    The OS needs to be on a different disk than the data, so if you have only two NVMe and two spinning rust, that will not work.  You can also run the cluster configuration wizard against a proposed configuration and it will let you know if it will work.

    It is a very good idea to talk with your system vendor about the systems and configurations they recommend for S2D.  S2D is a great technology, but it is also new.  The system vendors have spent months working on the configurations they offer to ensure they can support a stable platform.  That is not to say that you cannot put one together on your own, but then it will be up to you to shake out all the configuration issues on your own.


    tim

    Friday, December 1, 2017 2:05 PM
  • Check out this video as well which discusses Storage Spaces Direct design considerations:

    https://channel9.msdn.com/Blogs/windowsserver/Design-Considerations-for-Storage-Spaces-Direct

    Thanks!
    Elden

    Sunday, December 3, 2017 2:20 AM
    Owner
  • Hi Alain,

    >Would a 2x NVMe (capacity) + 2 x 300GB SAS (OS/hypervisor) scenario be acceptable?

    1. S2D supports three type of drives: NVMe, SSD, HDD;

    2. All servers must have the same drive type, if one server has NVMe, then all nodes require NVMe;

    3. What is the type of the drive in your description "SAS" drive? And how may drives in total for S2D?

    4. How many nodes in your failover cluster?

    >I heard a quorum disk is needed, is that mandatory? does it have to be of a specific disk type?

    It's recommended to configure quorum for a cluster, quorum is used to vote in case there are even nodes online in a cluster. Quorum disk(Witness disk) can be a file share or common shared storage, such as virtual disk connected by ISCSI, or even cloud witness.

    Quorum is not mandatory, but recommended.

    Related S2D documents:

    https://docs.microsoft.com/en-us/windows-server/storage/storage-spaces/storage-spaces-direct-hardware-requirements

    Welcome to feedback if there's anything unclear.

    Best Regards,

    Anne


    Please remember to mark the replies as answers if they help.
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    Tuesday, December 5, 2017 8:36 AM
    Moderator
  • Hi Alain,

    Just to check if the above reply could be of help, if yes, you may mark useful reply as answer, if there's anything unclear, welcome to feedback.

    Best Regards,

    Anne


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, December 11, 2017 3:08 AM
    Moderator