Re: query on VGDA

From: JOSEPH KREMBLAS (JKREMBLAS_at_REDHEARTGIFTS.COM)
Date: 10/13/04

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    Date:         Wed, 13 Oct 2004 10:05:17 -0700
To: aix-l@Princeton.EDU

    Please read 1.2.7.4 - Volume group descriptor area in the IBM Redbook
    entitled "AIX Logical Volume Manager from A to Z: Introduction and
    Concepts," (SG245432) for detailed information concerning your question.
    I hope this helps answers your question.

            --joseph

    -----Original Message-----
    From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU] On Behalf Of
    Kumar, Praveen (cahoot)
    Sent: Wednesday, October 13, 2004 9:41 AM
    To: aix-l@Princeton.EDU
    Subject: query on VGDA

    Hi,

    I have a small query on the number of VGDA's on a disk.

    In a situation where I have a vg say 'newvg' that was created with one
    disk, I understand that I'll have 2 VGDA's in it, when I add another
    disk to the same 'newvg', the new disk will also have 2 VGDA's on the
    disk but the LVM uses only the first VGDA. When I add the thrid disk to
    the same 'newvg', how many VGDA's would get allocated on this third
    disk, is it the same 2 VGDA's or only one.

    I also understand that after I add the third disk to the VG, the number
    of VGDA's on the first disk would still be 2 but if this vg is quorum
    enabled then the LVM would take in to consideration only 1 VGDA. Am I
    correct in saying this or not ? Please correct me if I am wrong.

    Warm Regards,
    Praveen.K
    ITC AMS - cahoot
    Int:35724
    Tel: 01494-835724

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