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  • 1.  Mirroing of NVMe disks

    Posted Thu December 22, 2022 10:50 AM

    Need to mirror 2 x NVMe disks (RAID1) to be used by IBM i vm over VIOS.

    Is it possible to do hardware mirroing of these disks via DIAG?

    Because in the NVMe Manager of the DIAG menu I can't find a mirror option.

    If this is not possible can I present these disks  directly to IBM i and mirror the namespaces via IBM i?


    Note: server is 9009-41G - NVMe feature code EC5B

    Edward Camilleri

  • 2.  RE: Mirroing of NVMe disks

    Posted Fri December 23, 2022 06:22 AM
    1 You must not mirror disks at the VIOS level - if you do mirroring problems are not reported to the Client OS.  This can lead to no one spotting stale mirrors and horrible problems later.
    2 Not with NVMe as there is no equivalent to the SAS adapter functions with NVMe.
    3 See 2
    4 Yes and it is recommended and a standard IBM i option. Note I am not an IBM i expert but my friend tell me this.

    Cheers, Nigel

    Nigel Griffiths

  • 3.  RE: Mirroing of NVMe disks

    Posted Tue December 27, 2022 01:35 PM


    Hi Nigel


    Thanks.  Agree with your suggestion  - what I did is present both NVMe disks to IBM I partition and then I did a mirror from it.






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