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  • 1.  How IBM i customers migrate from old storage to new storage

    Posted Mon May 29, 2023 09:55 PM
      |   view attached

    My IBM i customer is  considering how to migrate from old Flash Storage  to new Flash Systems storage.

    The QA in the link below states that it is possible to migrate storage using STRASPBAL.
    https://community.ibm.com/community/user/power/discussion/is-flashsystems-migration-function-available-when-only-storage-is-being-migrated#

    However, my customer has a single 150 GB LUN containing the load source and data. 
    There are about 30 IBM i partitions.
    The migration method using STRASPBAL seems to assume that the load source and data are on separate LUNs.
    Can I still use the STRASPBAL method in that case?



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    HIDETOSHI SAWADA
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    Attachment(s)

    pptx
    from_Old Storage_to_New.pptx   43 KB 1 version


  • 2.  RE: How IBM i customers migrate from old storage to new storage

    Posted Tue May 30, 2023 02:01 AM
    Edited by Satid Singkorapoom Tue May 30, 2023 02:07 AM

    Dear Sawada-san

    STRASPBAL is used only when there are more than one disk unit in each IBM i LPAR and it applies to non-LSU (load source unit) disk unit(s). 

    From your post, my understanding is that in all those 30 IBM i LPARs, there is only one LUN (of 150 GB size) in each LPAR.   If you confirm my understanding, then you migrate the disk only with copy load source operation.  (The new LSU unit must NOT be smaller than the current LSU).  You do this by IPLing IBM i LPAR in MANUAL mode and use the DST menu 3. Use Dedicated Service Tools (DST) --> 4. Work with disk units --> 2. Work with disk unit recovery --> 9. Copy disk unit data.  



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    Education is not the learning of facts but the training of the mind to think. -- Albert Einstein.
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    Satid S.
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    Original Message


  • 3.  RE: How IBM i customers migrate from old storage to new storage

    Posted Tue May 30, 2023 03:28 AM

    We migrate LUN's with the 'Remote Copy' function in the Storwize/Flashsystem.
    So the migration is on Storwize level, not on IBMi level.



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    H Haken
    Pantheon Automatisering B.V.
    Netherlands
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    Original Message


  • 4.  RE: How IBM i customers migrate from old storage to new storage

    Posted Wed May 31, 2023 07:02 PM

    Dear Satid 

    Dear haken

    Thanks a lot.

    I understand that migration is possible by copying with DST or FLASHCOPY of storage.
    I will discuss which method to migrate with the customer.



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    HIDETOSHI SAWADA
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    Original Message


  • 5.  RE: How IBM i customers migrate from old storage to new storage

    Posted Wed June 28, 2023 04:02 PM

    Hello Hidetoshi, the best option is to used the system migration, that is a solution that works with FlashSystems family. Another way to do this is making a replication between both storages and let the last portion of the data to be replicated with the source disks off.



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    Juan Martin Araya Carrasco
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    Original Message