Re: disk cache batteries

When I had this problem at a previous job, we originally were going to wait
until the weekend to replace the failed cache battery (the performance hit
wasn't supposed to be very bad).  By the time 2 hours had gone by, we
changed our mind on that because batch jobs that had any I/O at all were
taking about 3 times longer than usual.  We ended up installing the battery
that night!


                                                                           
             "Jim Franz"                                                   
             <franz400@xxxxxxx                                             
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             04/17/2005 06:29                                              
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We finally got thru our fix of disk cache batteries (iSeries 810 only
perhaps 4 years old).
The only clue we had was that the system became extremely slow during a
conversion test, running about 3 times slower. The CE claimed it shouldn't
have hit us that hard. I think otherwise - we were running large cpylib,
many chgpf's of big files, and adding 7 gig of files w/RPG to existing 10
gig.
Manager asking if I can prove it was the batteries (this was our final test
before go-live).
Can anyone else confirm losing cache batteries could cause such an effect?

btw- our only clue of hardware problem was wrkdsksts & F11 screen showed
disks in "degraded" status. After an ipl, we did get following 2 msgs in
qsysopr queue:
* *Attention*  Contact your hardware service provider now.
Message ID . . . . . . :   CPPEA12       Severity . . . . . . . :   99
A critical system hardware problem has occurred. Critical Message Handler
    has been run.
Message ID . . . . . . :   CPP8988       Severity . . . . . . . :   90

jim franz
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