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Method to identify ghost disk (Disk Processing in HACMP)

  • 1.  Method to identify ghost disk (Disk Processing in HACMP)

    Posted Wed November 12, 2008 01:42 PM

    Originally posted by: Kyne


    What can I conclude? (with explanations...) That I have to use SCSI2 method to identify ghost disk
    because I have same lun_id but different ww_name and scsi_id ?...
    Are the ww_name are ww_name of the controller of the SAN?
    Someting missing in my comprehension...
    My case:
    Name disk Location Parent ww_name scsi_id lun_id
    hdisk2 10-70-02 fscsi0 889 8 0 EMC Raid1
    hdisk3 10-70-02 fscsi0 889 8 11 EMC Raid5
    hdisk4 10-78-02 fscsi1 886 10 0 EMC Raid1
    hdisk5 10-78-02 fscsi1 886 10 11 EMC Raid5
    hdiskpower0 10-78-02 fscsi1 886 10 11 PowerPath Device
    Reference of HACMP Guide...

    SCSI2 ghost disk are those with diffrents names from the given disk, but identical parent and location attributes in CuDv;

    SCSI3 ghost disk are those with diffrents names from the given disk, but identical parent and location attributes in CuDv; and identical lun_id, scsi_id and ww_name attributes in CuAt.


  • 2.  Re: Method to identify ghost disk (Disk Processing in HACMP)

    Posted Wed November 12, 2008 03:39 PM

    Originally posted by: jvk


    I'm not sure what's the Q here.... and I don't see ghost disks.

    From above I would say that hdiskpower0 (LUN 11) has two paths, one via fscsi0 (and seen as hdisk3) and one via fscsi1 (seen as hdisk5).
    So hdiskpower0 is 'build up' with hdisk3 and 5.

    hdisk2 and hdisk4 seem also the same, but other LUN (LUN 0). Here i don't see theirs powerpath dev. which should also have lun_id 0.

    ww_name is a ww name of storage port.

    You can get some more info about hdiskpower/hdisk devs. from the ODM (CuAt)


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