Posted on 2009-02-10
Last Modified: 2013-11-17
Hi experts,

I have two node (A and B) cluster,  if i add one hdisk56 in to one node 'A', that same not reflecting in another node 'B', what will be the cause.

thanks in advance

Question by:sivakumar_experts
    LVL 68

    Accepted Solution

    Hi again sivakumar,
    when you say "cluster", do you mean HACMP?
    If yes, another question - are your volume groups "concurrent"?
    Anyway, the basic steps to add a hdisk, concurrent or not, would be (must be strictly in sequence!)
    1) Attach your hdisk to both nodes
    2) run 'cfgmgr' on the first node. Label the disk (still on first node) by issuing 'chdev -l hdisk56 -a pv=yes'
    3) run 'cfgmgr' on the second node. issue 'lspv' to verify that the disk was found (check pvids)
    4) on the node which has the volume group in question online, issue 'extendvg oravg hdisk56'.
    5) if vg is concurrent, you should see on the second node that the hdisk now belongs to the vg.
    6a) if concurrent, you can now work with your new hd. Creating a new FS on it is another thing, please tell me if you want to do so.
    6b) if non-concurrent, you must issue at the active node 'varyonvg -b -u oravg' and then on the second node 'importvg -L oravg hdiskx', where hdiskx is an existent disk in the vg, NOT the new one!!
    If you already have the disk on node A online and added to the vg, try only the steps 3) (cfgmgr on B) and 6b) (varyonvg on A, importvg on B) from above.
    Anyway, please come back and tell me what you did. I think I can give some more advice regarding HACMP and LVM.
    Good luck!

    Author Comment

    hi sir i did it,

    sir thanks lottttt and lot...

    i curse to know some more advice regarding HACMP and LVM.



    Author Comment


    any good book or good website to improve my knowledge .

    LVL 68

    Expert Comment

    Hi sivaji,
    so it works now? Glad to hear!
    As for HACMP resources -
    there is an IBM 'cookbook'
    here is IBM's starting page for HACMP (now 'PowerHA')
    especially this one
    ... and you can always look at
    which has links to nearly ALL AIX resources.
    Good reading!
    Norbert (wmp)

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