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Virtual disks of a storage pool based on NVMe disk are not visible with the partitions

  • 1.  Virtual disks of a storage pool based on NVMe disk are not visible with the partitions

    Posted Wed March 09, 2022 09:13 AM
    Edited by Lorraine Rizzuto Wed March 09, 2022 10:42 AM
    Hello

    I am using a single storage pool (rootvg)  which is  based on a single NVMe disk on an Alpine system in slot C4 . There are multiple virtual disks have been created based on the same storage pool (rootvg). The virtual disks have already been assigned to multiple LPARs.  However, only one of the virtual disks  visible , the rest of the virtual disks are not found when looking at the SMS menu ? 




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    Mel Bakhshi
    IT Specialist
    IBM Canada
    Markham ON
    1-905-413-3982
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  • 2.  RE: Virtual disks of a storage pool based on NVMe disk are not visible with the partitions

    Posted Wed March 09, 2022 09:22 AM
    On Wed, Mar 09, 2022 at 02:12:57PM +0000, Mel Bakhshi via IBM Community wrote:
    > I am using a single storage pool (rootvg)? which is? based on a
    > single NVMe disk on an Alpine system in slot C4 . There are multiple
    > virtual disks have been created based on the same storage pool
    > (rootvg). The virtual disks have already been assigned to multiple
    > LPARs.? However, only one of the virtual disks ?visible , the rest
    > of the virtual disks are not found when looking at the SMS menu ??

    First up, no client LPAR data belongs on VIO's rootvg. Used to be
    explicitly unsupported, just like using mirrored LVs as a backing
    device (virtual disk) isn't supported.

    Second, SMS will only show disks with a boot sector if you are trying
    to choose a boot device.

    > ------------------------------
    > Mel Bakhshi
    > IT Sepcilaist

    I'm sure you meant Specialist.

    ------------------------------------------------------------------
    Russell Adams Russell.Adams@AdamsSystems.nl
    Principal Consultant Adams Systems Consultancy
    http://adamssystems.nl/




  • 3.  RE: Virtual disks of a storage pool based on NVMe disk are not visible with the partitions

    Posted Wed March 09, 2022 09:24 AM
    Edited by Deepak Menezes Wed March 09, 2022 09:25 AM
    Hello Mel,

    First of creating Logical Volumes (LV's)  on VIOS rootvg to host client partitions is not a supported config as stated in redbook "IBM PowerVM Virtualization Introduction and Configuration"
    https://www.redbooks.ibm.com/redbooks/pdfs/sg247940.pdf
    Page : 212 (Search for Important section)


    But coming to you question . For a given client the disk holding the bootimage/boot record (i.e client's rootvg ) is displayed in SMS mode . If you want to check all the disks to verify if they are available you can use the  "ioinfo" utility in the "Open firmware"

    https://www.ibm.com/support/pages/how-determine-san-boot-disk-used-last-successful-vios-normal-boot

    Above doc is for SAN disk .But for a VIOS VSCSI disk  you will need to choose Option "7. VSCSIINFO" in step 3 of the document . This will show you all the disks


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    Deepak Menezes
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  • 4.  RE: Virtual disks of a storage pool based on NVMe disk are not visible with the partitions

    Posted Wed March 09, 2022 10:42 AM
    Thank you!

    ------------------------------
    Mel Bakhshi
    IT Sepcialist
    IBM Canada
    Markham ON
    1-905-413-3982
    ------------------------------