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  • 1.  Increase LUN Size in rootvg

    Posted Thu May 08, 2008 12:38 PM

    Originally posted by: SystemAdmin


    Hi

    In my rootvg, a PV is coming from storage, LUN size is changed, how can I reflect No. of PPs in rootvg. I am sure chvg -g is not possible in rootvg.

    Regards
    Amit Bist
    #AIX-Forum


  • 2.  Re: Increase LUN Size in rootvg

    Posted Thu May 08, 2008 04:08 PM

    Originally posted by: jvk


    If you ask me, no go.
    Why not mirror rootvg on a larger LUN and then remove original one? This can be all done on the fly.
    #AIX-Forum


  • 3.  Re: Increase LUN Size in rootvg

    Posted Fri May 09, 2008 02:14 AM

    Originally posted by: SystemAdmin


    Is it possible if I reboot my machine, the changes will be reflected automatically?
    #AIX-Forum


  • 4.  Re: Increase LUN Size in rootvg

    Posted Fri May 09, 2008 03:24 AM

    Originally posted by: jvk


    You can try and see... but as you know, man pages for the chvg -g says
    1) The user might be required to execute varyoffvg and then varyonvg on the volume group for LVM to see the size change on the disks.
    2) ...
    3) There is no support for re-sizing for the rootvg.
    If reboot (or shutdown/power on) overcomes 3) above, then you can still hit 1).
    #AIX-Forum


  • 5.  Re: Increase LUN Size in rootvg

    Posted Fri May 09, 2008 05:06 AM

    Originally posted by: SystemAdmin


    HHHhhhhmmmm,
    I got it.
    Thanks
    #AIX-Forum


  • 6.  Re: Increase LUN Size in rootvg

    Posted Mon March 23, 2009 12:21 PM

    Originally posted by: SystemAdmin


    Were you able to accomplish this? Iam in a similiar situation and I need advice.
    Thanks in advance
    "Increase the size of the rootvg disk (LUN) that is installed on SAN without adding another disk to the rootvg."
    #AIX-Forum


  • 7.  Re: Increase LUN Size in rootvg

    Posted Mon March 23, 2009 02:15 PM

    Originally posted by: j.gann


    when you have mirrored your rootvg you can remove a mirror copy, remove the hdisk, run cfgmgr to recognize the increased disk size, re- extendvg, mirrorvg and so on...
    #AIX-Forum


  • 8.  Re: Increase LUN Size in rootvg

    Posted Mon March 23, 2009 09:41 PM

    Originally posted by: apple08


    dear all,
    wld like to share and get your opinion.
    before this i have performed such similar action but not rootvg (datavg). extend bigger hdisk for datavg i mirrorlv for the entire datavg and once mirrored and no stale PP, i have removed the original hdisk.

    can we just do mirrorlv instead of mirrorvg? what is the possible risk?
    #AIX-Forum


  • 9.  Re: Increase LUN Size in rootvg

    Posted Wed March 25, 2009 03:46 PM

    Originally posted by: SystemAdmin


    No the rootvg is not mirrored, its just running on a single SAN LUN via 2 VIO servers, I wanted to be able to change the size of the rootvg without going through all this pain. Same is true for any other VG, just change the size of the disk and run chvg -g xxxvg and it works like a charm.
    Thanks
    #AIX-Forum


  • 10.  Re: Increase LUN Size in rootvg

    Posted Wed April 08, 2009 04:36 PM

    Originally posted by: Pave1


    Hi,

    it might even depend on the storage.
    Recently tested scenario of increasing LUN on non rootvg with DS8k with SDDPCM multipath and after chvg -g it worked nice.
    But with DS4k (MPIO) it required a reboot of an lpar, after that it was increased, no way without it ... it might even even on the firmware of the storage ...

    Cheers,
    Pavel
    #AIX-Forum


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