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Status Is a defect
Workspace IBM i
Categories Storage
Created by Guest
Created on Aug 28, 2020

IBM i operating system resiliency enhancement

We request improvement in the design of the resilience of the IBMi that we currently use in the banbif bank; This is due to the constant degradation incidents that we have had over time;
which was caused by faulty tranceivers with low power (tranceiver factory error in brocade switches).


Use Case:

Currently there are 4 access paths to the disks (2 redundancy) and what the design does when finding low power transceivers is to keep trying access because it does not see it as
error; therefore it keeps trying and generates degradation in the system; therefore we suggest improving this design and seeing how it recognizes this low power error and the system
use the other access paths (closing this faulty one until transceiver change is made). The idea is to have a resilient system for these types of scenarios.


Idea priority High
  • Guest
    Oct 28, 2020

    At this time, we are choosing not to invest in the suggestion you are making. The specific incident you mention is a real problem, but hopefully that defect has been addressed with the vendor and not something that should happen again. We are currently (and constantly) evaluating improvements to our error detection and recovery and will continue to monitor if this becomes more of a trend verses one time issue.

  • Guest
    Oct 13, 2020

    The CAAC has reviewed this requirement and recommends that IBM view this as a high priority requirement that is important to be addressed. As more folks move to external storage, they need to be able to trust the OS to identify and handle errors appropriately.

    Background: The COMMON Americas Advisory Council (CAAC) members have a broad range of experience in working with small and medium-sized IBM i customers. CAAC has a key role in working with IBM i development to help assess the value and impact of individual RFEs on the broader IBM i community, and has therefore reviewed your RFE.

    For more information about CAAC, see www.common.org/caac

    For more details about CAAC's role with RFEs, see http://www.ibmsystemsmag.com/Blogs/i-Can/May-2017/COMMON-Americas-Advisory-Council-%28CAAC%29-and-RFEs/

    Nancy Uthke-Schmucki - CAAC Program Manager

  • Guest
    Sep 29, 2020

    Under Consideration

  • Guest
    Sep 2, 2020

    Due to processing by IBM, this request was reassigned to have the following updated attributes:
    Brand - Servers and Systems Software
    Product family - Power Systems
    Product - IBM i
    Component - Storage
    Operating system - IBM i
    Source - None

    For recording keeping, the previous attributes were:
    Brand - Servers and Systems Software
    Product family - Power Systems
    Product - IBM i
    Component - Core OS
    Operating system - IBM i
    Source - None

  • Guest
    Sep 2, 2020

    IBM has modified some of the information in this request. Please contact us if you have any questions.

  • Guest
    Sep 2, 2020

    IBM has modified some of the information in this request. Please contact us if you have any questions.

  • Guest
    Sep 2, 2020

    IBM has modified some of the information in this request. Please contact us if you have any questions.

    In particular, RFEs are required to be in English so that a majority in the Community can read and vote on them. The Headline, Description, and Use Case have been translated to English. Do add a Comment if there is an improvement for the machine translation to English:

    Original Headline:
    Mejora de resilencia del sistema operativo IBM i

    Original Description:
    Solicitamos mejora en el diseño de la resilencia del IBMi que actualmente utilizamos en el banco banbif; esto debido a los constantes incidentes de degradación que hemos tenido en el tiempo;
    el cual fué originado por gbics defectuosos con baja potencia (error fábrica de los gbics en los switch brocade).

    Original Use Case:
    Actualmente se tiene 4 vías de acceso a los discos (2 de redundancia) y lo que hace el diseño al encontrar gbics con baja potencia es seguir intentando el acceso debido a que no lo ve como
    error; por tanto sigue intentando y genera degradación en el sistema; por lo cual sugerimos mejorar este diseño y ver la forma de que reconozca dicho error de baja potencia y el sistema
    utilice las demás vías de acceso (cerrando esta defectuosa hasta que se realice cambio gbic). La idea es tener un sistema resilente para este tipo de escenarios.