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  • LUN Allocation

    Hi

    I have this environment:

    4 x vSphere 4 hosts (ESXi)
    1 x EVA4400 SAN
    15 x vDisks (LUNs)

    I am adding 5 more vSphere (ESXi) hosts to the environment but i'm being caught out by the LUN allocation and need some help.

    My 15 vDisks were created and then presented to all 4 of the original hosts therefore each host has the same LUN assigned to it, e.g.

    vDisk 1:
    esx_host_1 = LUN 1
    esx_host_2 = LUN 1
    esx_host_3 = LUN 1
    esx_host_4 = LUN 1

    vDisk 2:
    esx_host_1 = LUN 2
    esx_host_2 = LUN 2
    esx_host_3 = LUN 2
    esx_host_4 = LUN 2

    But now when i present this vDisk to the new hosts it is getting presented as the next available LUN ID, e.g.

    vDisk 1:

    esx_host_1 = LUN 1
    esx_host_2 = LUN 1
    esx_host_3 = LUN 1
    esx_host_4 = LUN 1
    esx_host_5 = LUN 13
    esx_host_6 = LUN 13
    esx_host_7 = LUN 13
    esx_host_8 = LUN 13
    esx_host_9 = LUN 13

    Should i manually assign the LUN ID so it matches for all hosts?

    Thanks

    Simon

  • #2
    Re: LUN Allocation

    If anyone comes to this thread looking for an answer then you are fine presenting with the same LUN ID for different hosts.

    The HBA address will unique

    Simon

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    • #3
      Re: LUN Allocation

      Never seen this.
      Have you added the ESX hosts with the same lun masking and zoning?
      After this, rescan of the adapter might be sufficient.
      Marcel
      Technical Consultant
      Netherlands
      http://www.phetios.com
      http://blog.nessus.nl

      MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
      "No matter how secure, there is always the human factor."

      "Enjoy life today, tomorrow may never come."
      "If you're going through hell, keep going. ~Winston Churchill"

      Comment

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