MIDRANGE dot COM Mailing List Archive



Home » MIDRANGE-L » January 2013

PWRDWNSYS



fixed

A former co-worker had a problem last week during a scheduled maintenance window and the analysis afterward led a consultant to say this in his root cause analysis report:

"Anytime you are doing any kind of disk work on a system you always want to power the system down controlled. Ending the system "controlled" flushes the disk cache from memory to disk, "immediate" does not do this. I cringe when I see customers using *IMMED. 99% of the time the system will come back up without issue, but that other 1% results in the type of issue reported here. They took the time to end all of the subsystems to a restricted state before issuing the PWRDWNSYS, which is the right thing to do, but then powered down immediately. It's a common misconception that ending the system controlled takes significantly longer to end. Once the system is in a restricted state, it takes only seconds longer to end the system "controlled" versus "immediate". The trick to using *CNTRLD is to make sure you change the delay time to something like 5 (for 5 seconds) rather than the default of 3600, otherwise you'll be waiting an hour before the system starts powering down."


I have to say in 27 years of administering the platform in all its flavors I've never done a PWRDWNSYS *CNTRLD and I have yet to have any problems caused by that. Thoughts anyone??



Paul Fenstermacher | Sys/NW Admin,Sr | Corporate Systems - POWER Systems Administration | Jack Henry & Associates, Inc.(r)
663 West Highway 60 | Monett, MO 65708 | Ph. 417.235.6652 | x177389 | pfenstermacher@xxxxxxxxxxxxx<mailto:pfenstermacher@xxxxxxxxxxxxx>


NOTICE: This electronic mail message and any files transmitted with it are intended
exclusively for the individual or entity to which it is addressed. The message,
together with any attachment, may contain confidential and/or privileged information.
Any unauthorized review, use, printing, saving, copying, disclosure or distribution
is strictly prohibited. If you have received this message in error, please
immediately advise the sender by reply email and delete all copies.





Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2014 by MIDRANGE dot COM and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available here. If you have questions about this, please contact