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Status Not under consideration
Workspace IBM i
Categories Hardware
Created by Guest
Created on Jul 17, 2019

provide command to reset (IPL) CMBxx adapter

Please provide command to reset hardware adapter from command line rather than need to sign on to SST, go to hardware service manager, search for correct adapter and IPL I/O processor.

Use Case:

As we see more and more LPARs being virtualized (NPIV) we have the need more often to IPL IOPs to rescan FC network for new, changed or removed devices.
Mostly we see this for tape handling issues. As a lot of tape drives are capable of being attached through multipath we not only have to reset one but at least two CMBxx adapters.
Depending on setup - if you have a second tape library on a second location - we might have to reset 2 more adapters.
And this for multiple LPARs!

Idea priority Medium
  • Guest
    Jan 26, 2023

    I recently encountered a SQL procedure which can be used to reset iSCSI adapters -> CHANGE_IP

    Here some detail from desctiption:

    The CHANGE_IOP procedure initiates an operation on an I/O Processor. This procedure can be used to perform functions that are available in the Hardware Service Manager.

    Example invocation:


    Unfortunatly the parameter IOP is hardcoded and can only be "ISCSI".

    Can this be extended to specify "CMBXX"?

  • Guest
    May 11, 2020

    The request does not match any similar commands that the QSMGSSTD API provides. The potential command could cause unwanted system behavior because it wouldn't be able to determine if it is safe to perform the IPL of the IOP bus adapter

    It is recommended that tape devices are not mixed with DASD devices on an adapter. The recommended and correct way to IPL the IOP, if there is no DASD devices attached to the IOP, is to vary off all the devices attached to the IOP and then vary on one of them on with reset. There are already APIs and commands that a user can use to write a tool that could automate the varying off of all the tape devices and vary on one of the tape devices, for each IOP, with RESET(*YES).

  • Guest
    Dec 18, 2019

    IBM has received the requirement and is evaluating it. IBM will provide a response after evaluation is complete.