Mirroring Root VG - Aix

This is a discussion on Mirroring Root VG - Aix ; Ive set up mirroring with the rootvg using the isntructions here: http://ramses.smeyers.be/varia/aix/mirrorrootvg/ however now after reading: http://www.ahinc.com/aix/logicalvol....GICAL%20VOLUME I see i have done it slightly differently, to this method. Ive never mirrored anything in AIX before, and find the documentation a ...

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Thread: Mirroring Root VG

  1. Mirroring Root VG

    Ive set up mirroring with the rootvg using the isntructions here:

    http://ramses.smeyers.be/varia/aix/mirrorrootvg/

    however now after reading:

    http://www.ahinc.com/aix/logicalvol....GICAL%20VOLUME

    I see i have done it slightly differently, to this method. Ive never
    mirrored anything in AIX before, and find the documentation a little
    bit "sparse" to say the least. Previous to finding this second
    article, i had yanked one fo the mirrors, with the intention of
    finding out how to replace a failed disk.

    Loss of information at this time isnt particularily critical, aas the
    machine is just a test, but now in that second article basically i
    read :

    To protect against this, the Mirror Write Consistency Cache was
    developed to write a record to the disk each time a mirrored write is
    in progress, so that when the system is rebooted, a record will show
    that possible inconsistencies may exist, and the data from the first
    physical partition is rewritten to all other physical partition
    copies.

    That means if i pulled hdisk0 it will revert to the data previous to
    pulling the disk?

    also, commands like restart, halt ect dont work, cos of permission
    errors, and stuff like shutdown is missing. Does this mean the disks
    werent synched correctly, or is there something else i should do?

    If the disk i pulled has older data, does the autosync give the choice
    of which to use? If not is there a way to get it to use the one it is
    currently running off?

    What should i do here. Power off and put the disk back in?




    # lsvg -l rootvg
    0516-034 : Failed to open VG special file. Probable cause
    is the VG was forced offline. Execute the varyoffvg and varyonvg
    commands to bring the VG online.#


  2. Re: Mirroring Root VG

    On May 17, 12:43 pm, bomahony wrote:
    > Ive set up mirroring with the rootvg using the isntructions here:



    After a reboot, the system now works correctly. The disk is still
    pulled out however.

    B


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