Topic
3 replies Latest Post - ‏2009-11-03T22:17:33Z by SystemAdmin
vault
vault
3 Posts
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Pinned topic vdisk migrate SVC

‏2009-06-11T23:59:21Z |
Hi there, can vdisk be migrated between the mdiskgrps having different extent size?

Thanks in advance
Updated on 2009-11-03T22:17:33Z at 2009-11-03T22:17:33Z by SystemAdmin
  • SystemAdmin
    SystemAdmin
    4779 Posts
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    Re: vdisk migrate SVC

    ‏2009-06-12T00:53:19Z  in response to vault
    You cannot migrate vdisks between mdiskgrps, where each mdisk group has a different extent size.

    So this is an issue.

    But IBM brought out VDisk mirroring in 4.3 code which CAN mirror a vdisk between mdisk groups with different extent sizes.
    So if you want to do a migration from small extent sizes to larger ones, upgrade your SVC code and then use vdisk mirroring to achieve this.

    Check out this Redbook for more info:

    http://www.redbooks.ibm.com/abstracts/sg247574.html?Open
    • vault
      vault
      3 Posts
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      Re: vdisk migrate SVC

      ‏2009-11-03T21:57:57Z  in response to SystemAdmin
      Hi,

      When I try to make vdisk mirror to copy of one the existing vdisk to anoter manage disk group to migrate the DS8000 data to XIV, I recieved the error CMMVC6350E "The command failed because there is insufficient mirror bitmap space". I checked io group info it shows that SVC io grp doesn't have available memory to allocate. How can I allocate memory to io grp to make the vdisk mirror funtion worked?
      #svcinfo lsiogrp 1
      id 1
      name io_grp1
      node_count 2
      vdisk_count 149
      host_count 78
      flash_copy_total_memory 20.0MB
      flash_copy_free_memory 19.8MB
      remote_copy_total_memory 20.0MB
      remote_copy_free_memory 20.0MB
      mirroring_total_memory 0.0MB
      mirroring_free_memory 0.0MB

      Thanks and Regards
      • SystemAdmin
        SystemAdmin
        4779 Posts
        ACCEPTED ANSWER

        Re: vdisk migrate SVC

        ‏2009-11-03T22:17:33Z  in response to vault
        I think you're looking for this:

        http://publib.boulder.ibm.com/infocenter/svcic/v3r1m0/index.jsp?topic=/com.ibm.storage.svc.console.doc/svc_copyservdskmirrormodmemory_3t2xsb.html