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  • 1.  Is this a forum where one may ask question about DS8910?

    Posted Fri March 07, 2025 09:33 AM
    Reply

     

     

    Jean-Max Deetjen, Mainframe System Administrator
    Welfare & Pension Administration Service, Inc.
    7525 SE 24th St. Suite 200, Mercer Island, WA 98040

    Phone:   (206) 441-7574 Ext. 3828                                                                                                                                            Mobile:  (856) 448-2420
    Fax:        (206) 505-9727
    E: mdeetjen@wpas-inc.com
    W: www.wpas-inc.com

     



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  • 2.  RE: Is this a forum where one may ask question about DS8910?

    Posted Fri March 07, 2025 09:34 AM
    Reply

    Absolutely! Fire away!



    ------------------------------
    Ian Wright IBM Champion for Storage, Red Hat Accelerator
    System Engineer
    Mainline Information Systems
    IBM Champion for Storage
    Red Hat Accelerator
    ------------------------------

    Original Message


  • 3.  RE: Is this a forum where one may ask question about DS8910?

    Posted Fri March 07, 2025 10:31 AM
    Reply

    VM 7.2 and VSEn 6.3

    OSA in QDIO mode

     

    DS8910 replicating to a remote about 200 miles away. Lately we have been having issues where replication stops (probably bad fiber channel interface in router) at the remote site.

    The problem is that after about 7-10 minutes all TN3270 terminal (IP) start going inactive and the only way to get them is to recycle the tn3270 stacks. Lots of irate users. This a broad description, cannot be more specific since I do not maintain the storage unit nor the telecom environment between the 2 sites.

     

    Thanks,

     

    Jean-Max Deetjen, Mainframe System Administrator
    Welfare & Pension Administration Service, Inc.
    7525 SE 24th St. Suite 200, Mercer Island, WA 98040

    Phone:   (206) 441-7574 Ext. 3828                                                                                                                                            Mobile:  (856) 448-2420
    Fax:        (206) 505-9727
    E: mdeetjen@wpas-inc.com
    W: www.wpas-inc.com

     



    wpas sm logo

    Confidentiality Notice

    The information contained in this communication from the sender is confidential. It is intended solely for use by the recipient and others authorized to receive it. If you are not the recipient, you are hereby notified that any disclosure, copying, distribution or taking action in relation of the contents of this information is strictly prohibited and may be unlawful.

    This email has been scanned for viruses and malware by Mimecast.




    Original Message


  • 4.  RE: Is this a forum where one may ask question about DS8910?

    Posted Fri March 07, 2025 11:02 AM
    Reply

    Ok, I have to address this from the storage side. And from a DS8000 (I assume we're using Global Mirror) 200 miles is fine.

    But, by its architecture, if the remote copy is suspending then it should just be continuing to write locally -- Global Mirror will just note all of the locations of changes in its Out Of Sync (OOS) bitmap until the replication can start again.

    The challenge is that without the people who maintain the storage and the network, this is a difficult thing to troubleshoot. We don't know what error messages are coming up or what the DS8000 is seeing in the remote.

    I would suggest opening a PMR on this as, again, if GM is suspended then it should just ride out the outage and then resync when the network was available again.

    Support should be able to get a better idea of what's happening in the DS8910s that's causing the disruption.



    ------------------------------
    Ian Wright IBM Champion for Storage, Red Hat Accelerator
    System Engineer
    Mainline Information Systems
    IBM Champion for Storage
    Red Hat Accelerator
    ------------------------------

    Original Message