AIX

AIX

Connect with fellow AIX users and experts to gain knowledge, share insights, and solve problems.


#Power
 View Only

  • 1.  Does missing disk affect HACMP failover

    Posted Tue August 11, 2009 07:19 AM

    Originally posted by: dingdingfish


    i have a two node HACMP cluster, share a VG with 20 disks, these 20 disks are distributed in two storage, 10 in storage 1 and 10 in storage 2, they are mirrored using AIX lvm. now i power off storage 2, can HACMP succeesfully take over?
    #AIX-Forum


  • 2.  Re: Does missing disk affect HACMP failover

    Posted Tue August 11, 2009 07:35 AM

    Originally posted by: tony.evans


    Why does HACMP need to take over?

    If you've correctly configured the disks and mirroring, AIX can continue using the disks (although it'll be slow), and hence there's nothing for HACMP to do.
    #AIX-Forum


  • 3.  Re: Does missing disk affect HACMP failover

    Posted Tue August 11, 2009 08:00 AM

    Originally posted by: CRM


    Check out the resource group options, see the admin guide for details around:

    Use Forced Varyon of Volume Groups, if Necessary

    The default is false. If this flag is set to true, HACMP uses a forced varyon to bring each volume group that belongs to this resource group online in the event that a normal varyon for the volume group fails due to a lack of quorum, and if HACMP finds at least one complete copy of every logical partition in every logical volume available for this volume group. Use this option only for volume groups in which every logical volume is mirrored. It is recommended to use the super strict disk allocation policy; the forced varyon operation is unlikely to be successful for other choices of logical volume configuration.

    regards

    Chris
    #AIX-Forum


  • 4.  Re: Does missing disk affect HACMP failover

    Posted Tue August 11, 2009 10:13 AM

    Originally posted by: dingdingfish


    thanks a lot, CRM.
    but can i specify the -f option in HACMP config, so HACMP will work fine when one storage failed.
    i don't know how to use HACMP, but since i can manually varyoffvg and varyonvg in another host, i think HACMP is just a tool that integrate all manual steps and make it automatically.
    #AIX-Forum


  • 5.  Re: Does missing disk affect HACMP failover

    Posted Wed August 12, 2009 04:53 AM

    Originally posted by: CRM


    No flag to set, just have to go into HACMP and set that flag on the resource group.

    You need to speak to an HA admin to get this checked/set.

    regards

    Chris
    #AIX-Forum


  • 6.  Re: Does missing disk affect HACMP failover

    Posted Tue August 11, 2009 08:01 AM

    Originally posted by: dingdingfish


    i just want to test whether HA works when one mirror copy is failed.
    #AIX-Forum


  • 7.  Re: Does missing disk affect HACMP failover

    Posted Tue August 11, 2009 08:12 AM

    Originally posted by: tony.evans


    > dingdingfish wrote:
    > i just want to test whether HA works when one mirror copy is failed.

    Ah, in that case, CRM's response is the right one.
    #AIX-Forum


Related Content