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DS4800 Problem reported on AIX

  • 1.  DS4800 Problem reported on AIX

    Posted Mon May 03, 2010 03:43 PM

    Originally posted by: ToufikZamoun


    Hi,

    It's my first time I connect to this forum.

    A problem occured recently on a DS4800.
    The disk storage is connected throw a San switch to
    a cluster Power5 P561 (9116-560) (2 nodes).

    The error logged on Aix (on the 2 nodes) is :'mirrroring
    of the DS cache which is disabled'

    Below a sample related to hdisk9 (all the other hdisks of the 2 nodes P561 are concerned by the error)

    LABEL: FCP_ARRAY_ERR25
    IDENTIFIER: C8375BE4

    Date/Time: Wed Apr 7 16:19:58 NFT 2010
    Sequence Number: 47953
    Machine Id: 00C1C9804C00
    Node Id: p561n1
    Class: O
    Type: INFO
    :

    Resource Name: hdisk9

    Description
    "CACHED DATA WILL BE LOST IF CONTROLLER FAILS"

    Probable Causes
    "USER DISABLED CACHE MIRRORING FOR THIS LUN"

    User Causes
    "CACHE MIRRORING DISABLED"

    Recommended Actions
    "ENABLE CACHE MIRRORING"

    Detail Data
    SENSE DATA
    0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0400 00EE 0000 0000
    0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
    0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
    0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
    0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
    0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
    0000 0000 100E 7000 F205 3701 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
    0000 0000
    However using DS storage Manager the machine is optimal and
    shows no failure.
    I also verified that the 'cache' mirroring is enabled for all the luns.
    Write cache with mirroring: Enabled
    So, it was not disabled as reported by error log , I d'ont understand this situation.

    .The fiber channel cards are at the last firmware level.
    DS4800 firmware:07.36.17.00
    P561 firmware: SF240-358
    AIX:5.3 TL7

    Joined file:
    DS4800 profile.

    Can anyone help me to understand what happened !

    Best Regards.
    #AIX-Forum


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