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  2. MIDRANGE-L
  3. December 2006

Re: i5 Cache Battery

Incidentally, if the cache battery fails, or for some strange reason you
miss the warning message, system performance will be seriously degraded. We
had this happen a couple of weeks ago and it messed everything up. Jobs that
previously ran in 1 or 2 minutes were taking 20-30 minutes. I struggled with
the issue for almost a week until I stumbled upon it accidentally when doing
a WRKDSKSTS and noticed the protection status was "DEGRADED". The reason it
effected performance was due to all writes to disk were direct instead of
buffered, which apparently makes a pretty big difference.

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