This topic ended up, as it should have, focused on flushing cache. As I think about it, if ENDSBS *ALL does not completely flush the disk cache and it isn't completely flushed until a PWRDWNSYS *CNTRLD is done then every restricted state backup ever done is potentially invalid UNLESS all the save commands somehow save the information in the disk cache. Thoughts, again?
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
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Sue Baker
Sent: Thursday, January 17, 2013 7:52 AM
Subject: Re: PWRDWNSYS
On 1/16/2013 12:52 PM, Jeff Crosby wrote:
Would the cache batteries have held properly from whenever the UPS
batteries went dead until 1pm?
Yes, the cache batteries should have held the contents of the write cache for the few hours you were without power.
The adapter slot must be powered on in order for the batteries to charge from electrical power. Depending on system type, this may mean the LPAR must be active (to DST at least) for the trickle charging to occur.
With the cache batteries in normal condition, the contents of write cache should not be lost if you have to go multiple days without power.
IBM Americas ATS - Power Systems
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