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  • 1.  Disk Question

    Posted Tue November 07, 2006 06:31 AM

    Originally posted by: SystemAdmin


    Hi All, we have the following disk setup:-

    lspv

    hdisk0 <id> rootvg active
    hdisk1 <id> rootvg active
    hdisk2 none None
    hdisk3 none None
    hdisk4 none None
    hdisk5 none None
    hdisk6 none None
    hdisk7 none None
    hdisk8 none None
    hdisk9 none None
    vpath0 <id> appvg active
    vpath1 <id> appvg active
    vpath2 <id> appvg active
    vpath3 <id> appvg active
    My question is, where the disk no. has "None" and "None" opposite, does this mean these disks do not exist and are only shown be default? And what does the vpathx signify?

    Many thanks
    Steve
    #AIX-Forum


  • 2.  Re: Disk Question

    Posted Tue November 07, 2006 08:27 AM

    Originally posted by: SystemAdmin


    Steve: I'm not sure about vpath but "none none" in the lspv output means that the disk exists physically and is connected to the system but isn't part of any volume group. This would be the usual state for disks you've just connected to the system but haven't done anything else with as yet. Disks which were formerly connected to this or another system should show a pvid (physical volume id) in the output.

    HTH

    Jim Lane
    #AIX-Forum


  • 3.  Re: Disk Question

    Posted Tue November 07, 2006 09:02 AM

    Originally posted by: VirtualGreg


    I suspect those disks, in this case, are part of your volume group. I'm guessing you have 4 dual path LUNs and SDD is being used? The hdisks are what AIX saw first, the vpaths were created once the correct disk driver took over.

    If this is ESS or DS8000 disk you might want to try SDDPCM.

    Normally, as Jim points out, the none and None are what you see with brand spanking new disks that have never been part of a VG.
    #AIX-Forum


  • 4.  Re: Disk Question

    Posted Tue November 07, 2006 10:39 AM

    Originally posted by: SystemAdmin


    Many thanks Guys, this has given me something to work from. Incidentally, what is SDD and what commands can I use to query any virtual paths set up.

    Many thanks
    #AIX-Forum


  • 5.  Re: Disk Question

    Posted Tue November 07, 2006 04:52 PM

    Originally posted by: eichher


    SDD is the "subsystem device driver" which controls your SAN paths to your luns in your disk subsystem. Seems you have two paths to each of four luns so you see 8 hdisks (all the paths) and 4 vpaths (the luns). To check this use commands "datapath query adapter" and "datapath query device".
    #AIX-Forum


  • 6.  Re: Disk Question

    Posted Tue November 07, 2006 11:28 PM

    Originally posted by: SystemAdmin


    Hi ,

    I hope currently you r using SDD Device drivers for ur ESS or DS8000 series storages. So you are getting 4 vpath disk's with dual paths.

    you can use lsvpcgf command to check all your vpath devices & respective hdisks.

    Rgds
    Sanku
    #AIX-Forum


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