In this post I explain how date and time management works on an AIX, VIOS, and IBMi LPARs. Setting the time is usually one-time operation, we often take it for granted, as long as everything works well. However, when issues arise, it can become quite puzzling. Information in this post may be particularly useful for those who use Full System Replication or FlashCopy solution.
Continue reading “How Time and Data Management works on IBM PowerSystems”Category: IBM i
Dell/EMC storage and IBM i – what’s happening
EMC was/is the biggest IBM competitor in terms of external storage arrays compatible with IBM i OS. Few years ago – EMC was acquired by Dell, but still the company delivers storage compatible natively with IBM i. This connection was possible thru D910 driver embedded into IBM i OS. Different method how IBM storage arrays talk to IBM i OS but still good enough to use NPIV protocol and get decent performance from an external storage array.
Continue reading “Dell/EMC storage and IBM i – what’s happening”Store Single Sign On configuration on iASP
In solutions where the iASP and Single Sign On (SSO) is configured the challenge is to set the synchronization of the Enterprise Identity Mapping (EIM) between Prod and DR nodes. Such replication is done via Tivoli Directory Server. This mechanism is not easy to set up, difficult to manage and monitoring. Unfortunately this the only solution what IBM provides (officially). In this article I provide the procedure how to simplify it.
I’ve been asked several times – “Is it possible to store SSO configuration on the independent ASP” and forget about Tivoli replication? Yes, it is possible. It simplifies EIM synchronization a lot. Why? – Because only one EIM DB is stored on the iASP. Therefore, if the system fail-over to DR location, exactly the same DB shows up on the other side. Read below how to do it.
Continue reading “Store Single Sign On configuration on iASP”Execute IBMi command within multiple sessions
Recently I was asked how to execute a command typed in 5250 terminal among multiple sessions. For instance, when you need to create a library DEV on three systems, and you are lazy do copy/paste.
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VIOS 3.1 upgrade for everyone
I assume there are many installations which need to go to VIOS 3.1 by October 2020 due to end of support for VIOS 2.x. Because, I did not find any upgrade procedure for “dummies”, I decided to write one which I hope people find useful. I do not cover only the upgrade process itself, but also share some advises how to do it safely and recover in case of troubles. Upgrade Virtual I/O Server to 3.1 is completely different process than before. For instance, you are going to need an extra disk to perform the operation. Interested?
New VIOS releases affect the Shared Ethernet Adapter (SEA) functionality
Long story short – how regular VIOS update ended with few weeks investigations completed with the serious VIOS bug and the APAR (IJ25390). The latest VIO releases contain a serious bug which may affect all VIOS/SEA client LPARs on IBM Power Servers.
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IBM Technical University Prague 2019
I had a pleasure to attend IBM Technical University conference last week of October in Prague. I also have been given a chance to run four sessions. Read about the conference and other interesting facts below.
Recovering an invalided Load Source disk
As I wrote in the previous post, there might a situation when another/former load source disk become part of the LPAR configuration. IBMi OS configuration allows to run only with one valid load source, therefore the operating system will change a specific sector, making a former load source disk a regular disk. Therefore, this disk can’t be used as the Load Source never again. In this post I will describe what sector need to be changed in order to recover the disk, and reuse it in another configuration.
IBMi – Copy the load-source disk FAQ
Process for copying the load source disk is sort of a black box. The copying process is straight forward, but there is no documentation ‘what if’. My assumption is because this is very sensitive operation, IBM does not want us to meddle with the process. I’ve created sort of summary for admins based on my experience ,and research made over hundreds copying processes. I bet you won’t get this information thru any official channel.
IBM iDoctor for beginners
I want to introduce IBM iDoctor tool to people who does not know it. Few years ago, I didn’t know the tool either, and I’ve heard lot of wired stories what the aim is. These days, I can’t live without it, and every single serious performance analysis starts with the tool. I want to show you in very simple steps how to do a basic analysis. Not sure if you know, but the tool is available with 45-days free trial. So, you can give a try without paying a single penny, or ordering an expensive consultant. Continue reading “IBM iDoctor for beginners”
IBMi.org - Bart's blog 