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disc 3 errors on IBM brocade switch

  • 1.  disc 3 errors on IBM brocade switch

    Posted 08-10-2018 01:59 AM

    We have IBM Flex switch connected to  IBM Brocade switches where in we can see Disc 3 errors on fours ports of both switches which are connected to IBM array V7000

     

    Issue Short Description :

     

    We have three IBM Flex Where in all blades are connected to IBM Brocade switches via Flex Built in Switch .

    IBM v700 Array connected to IBM Brocade switches which is connected to vPlex .

    The ports on IBM Brocade switches such as 3,7,8 and 12 are having disc 3 errors on both switches .These ports on switch are connected to IBM Array.Please find the attached screen shot to know errors 

     

    So please someone can assist/advise ,does these errors causes any performance /connection issues, If so, help to fix the issue  since currently we are facing some sort of disk read issues on hosts which are connected to this array and switches .

     

    Thanks in advance for your great support


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  • 2.  Re: disc 3 errors on IBM brocade switch

    Posted 08-10-2018 02:17 AM
    Hello,

    please share "portstatsshow slot/port" for affected ports.


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  • 3.  Re: disc 3 errors on IBM brocade switch

    Posted 08-10-2018 03:15 AM

    @shakol

     

    you don't specified neither Brocade Switch Type nor FOS release.

     

    be aware, Storewize required on Gen4 Platforms with FOS 6.2.0 onwatds, Fillwords is Set to Mode 3


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  • 4.  Re: disc 3 errors on IBM brocade switch

    Posted 08-10-2018 04:26 AM

    Thanks for your response and assistance  .here is FOS details

     

     

    version
    Kernel: 2.6.14.2
    Fabric OS: v7.2.1a
    Made on: Thu Mar 6 22:25:41 2014
    Flash: Tue May 13 13:55:06 2014
    BootProm: 1.0.11


    chassisshow

    FAN Unit: 1
    Fan Direction: Forward
    Time Awake: 1511 days

    FAN Unit: 2
    Fan Direction: Forward
    Time Awake: 1511 days

    POWER SUPPLY Unit: 1
    Power Source: AC
    Time Awake: 1511 days

    POWER SUPPLY Unit: 2
    Power Source: AC
    Time Awake: 1511 days

    CHASSIS/WWN Unit: 1
    Header Version: 2
    Power Usage (Watts): -87
    Factory Part Num: 40-1000569-13

    Manufacture: Day: 15 Month: 1 Year: 2014
    Update: Day: 9 Month: 8 Year: 2018
    Time Alive: 1511 days
    Time Awake: 1511 days
    ID: IBM0000CA


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  • 5.  Re: disc 3 errors on IBM brocade switch

    Posted 08-10-2018 05:27 AM

     

     

    Hello,

    there is some discards er_zone_miss which refers to the frames with has invalid destination ID.
    Which kind of zoning do you have between these target ports and initiators ?

    Is the IBM storage virtualized in VPLEX head ?

     


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  • 6.  Re: disc 3 errors on IBM brocade switch

    Posted 08-10-2018 07:19 AM

    Thanks Marian Bezeg for your quick response and helping.

     

    Which kind of zoning do you have between these target ports and initiators ? : Soft Zoning

     

    Is the IBM storage virtualized in VPLEX head ? : No, However we have VNX Array connected to backend port of vPlex ,thus we have zoning  between these hosts/initiators (IBM blades) and vplex  via front End ports

     

    From IBM array , Four LUNs presented to initiator via these switches (a and b) to these initiators (IBM Blade)

    From EMC array, Eight LUNs are presented to initiators via vPlex(EMC array is back end array) .

     

    Looks forward your help 


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  • 7.  Re: disc 3 errors on IBM brocade switch

    Posted 08-10-2018 07:26 AM
    Hello,

    i would like to use hard zooning wher you will have only wwwns or only D,PI in zones.

    The errors appeared in logs may be from old initiators which still remember target PID, but i think that errors will be on server side then....

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  • 8.  Re: disc 3 errors on IBM brocade switch

    Posted 08-10-2018 07:31 AM

    Thanks Marian Bezeg.

     

    Since we have standard to use soft zoning,However We have many zoning configurations for decommissioned hosts/initiators in both switches ,so hopefully  deleting these unused/decommissioned zoning might fix the issue ?

     


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  • 9.  Re: disc 3 errors on IBM brocade switch

    Posted 08-12-2018 11:28 PM
    Hello,

    are you using D, port or wwns in zoning configuration? Soft zoning is in case that you mix it as the members are resolved by name server.

    Try to focus on old zoning config between imitators and affected ports.


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  • 10.  Re: disc 3 errors on IBM brocade switch

    Posted 08-10-2018 04:19 AM
      |   view attached

    Thanks for your response .

     

    Please find the attached text file to know portstatsshow slot/port" for affected ports.


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    Attachment(s)

    docx
    Switch logs.docx   17K 1 version