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  • 1.  online LUN expand

    Posted Jul 21, 2010 09:05 AM


    I have question about online LUN expand. I use vpshere4 with my storage array. I can expand LUN on storage array level. How about VMFS expand? Can I do it with vms power on? If is it good practise use extended VMFS? influence for performance?

  • 2.  RE: online LUN expand
    Best Answer

    Posted Jul 21, 2010 11:47 AM

    Yes you can expand a VMFS datastore dynamically with vSphere while you have running machines on the VMFS datastore - this is preferable to adding extents -

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  • 3.  RE: online LUN expand

    Posted Jul 21, 2010 12:18 PM

    As weinstein5 said, no problems with doing this online. It is comparable to the Windows diskpart extend function.

    If you created the VMFS datastore with an earlier version of ESX you may need to grow the datastore by connecting directly to an ESX host instead of vCenter.


  • 4.  RE: online LUN expand

    Posted Jul 21, 2010 12:59 PM

    Thank you for your answes, and what about virtual disk perfomance using this scenario?

  • 5.  RE: online LUN expand

    Posted Jul 21, 2010 01:08 PM

    There is no negative impact

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