vSphere Storage Appliance

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  • 1.  STORAGE MIGRATION WITHOUT DOWNTIME

    Posted Sep 17, 2012 07:31 PM


    When we do the Storage Migration what are all the challenges would be?
    Ex: From one IBM storage to Hitachi.

    There should be No downtime.



  • 2.  RE: STORAGE MIGRATION WITHOUT DOWNTIME

    Posted Sep 17, 2012 07:34 PM

    if you are using storage vmotion there is no downtime.

    you might lose a ping.



  • 3.  RE: STORAGE MIGRATION WITHOUT DOWNTIME

    Posted Sep 17, 2012 07:38 PM

    Storage VMotion will allow the migration storage without downtime,  not wanting to teach anybody to suck eggs,  for this to work both arrays storage will need to be zoned and presented to the relevant ESXi hosts.

    you should lose no more that the odd ping packet.



  • 4.  RE: STORAGE MIGRATION WITHOUT DOWNTIME

    Posted Sep 17, 2012 08:44 PM

    Some considerations:

    - If you are moving only VMDKs, You will need to present new LUNs on the new storage and format them as VMFS. Use this chance to redesign anything you may have not planned before (LUN sizes, raidgroups, VMFS block sizes if VMFS3 used, etc).

    - Have in mind ESX have the limit of 256 maximum LUNs that can be presented to a single host.

    - If an ESX will not participate on the migration (i.e. does not have VMs to be migrated on it, etc) do not present the new LUNs unnecessarily to it.

    - Try not to replicate VMFS, as it may bring ressignature issue to surface. It is simpler not to do it and rely only on svMotion.

    If I remember anything else will post here... :smileyhappy:

    Good luck with that.