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#Power
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  • 1.  Change Reserve policy of disk to use for oracle RAC

    Posted Tue July 29, 2008 04:57 AM

    Originally posted by: syedsaleembasha


    hello,

    when i use below command
    chdev -l hdisk28 -a reserve_lock=no

    Method error (/usr/lib/methods/chgdisk):
    0514-062 Cannot perform the requested function because the
    specified device is busy.
    the disk is assigned from EMC storage and has same LUNID on both hosts.

    any solution please
    #AIX-Forum


  • 2.  Re: Change Reserve policy of disk to use for oracle RAC

    Posted Tue July 29, 2008 05:03 AM

    Originally posted by: CRM


    Where are you running this command, I am guessing on the LPAR, but just to check that you have not got any VIO in there too.

    What MPIO device driver are you using, most EMC shops use POWERPATH to enable load_balance to be used allowing the bandwidth of all HBA adapters to be used, just make sure you license it as EMC do charge for this.

    If you are uisng POWERPATH then the command is not correct, I think the attribute is reserve_lock=no you need to set.

    If you are using EMC disks and the default MPIO then I would expect you will need the ODM filesets anyway to allow AIX to identify the disks, anybody using this mechanism that can confirm as I have only used POWERPATH before? I would suggest that you get hold of the ODM filesets if this is the case and then install, reboot and retry.

    Of course it may be as simple as the other box booted first and has hold of the disk and you just need to run the command on the other node...

    regards

    Chris
    #AIX-Forum


  • 3.  Re: Change Reserve policy of disk to use for oracle RAC

    Posted Tue July 29, 2008 06:39 AM

    Originally posted by: syedsaleembasha


    hdisk1 00cad94f430afe14 rootvg active
    hdisk3 00cad94feeb94d1b rootvg active
    hdisk28 none None
    hdisk29 none None
    hdiskpower1 none None
    hdiskpower2 00cad94f9dd86e3e oraappvg active
    hdiskpower3 none None
    hdiskpower0 none None

    this is the out put of lspv in node1. we are using powerpath devices also.And we have 6 lpars and 1 vio on this machine. hdisk28, 29 which we want to change reserve policy are not powerpath disks but individual disks of 300mb each.

    both hdisk28 and hdiskpower2 are using same card fcs2.
    varyoffvg orapppvg

    tried to remove fcs2
    again one more device busy error.
    #AIX-Forum