Write cache for a SAN

For those of you using a SAN, do you disable the write cache?  I am concerned 
that if the UPS loses power thus bringing the SAN down,that writes to the 
datafiles would be lost.  Oracle would think they are completed but never 
actually done.
 
 
Jeffrey Beckstrom
Database Administrator
Greater Cleveland Regional Transit Authority
1240 W. 6th Street
Cleveland, Ohio 44113

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