RE: Write cache for a SAN
Date: Mon, 3 Nov 2008 09:19:58 -0500
We don't disable it. The SAN manufacturers have made this as bullet proof as possible. Ours has redundant power supplies to make sure that cache is written. Nothing is completely fool proof but they have made it as much so as possible. We just had a back plane failure on a relatively new SAN that necessitated us moving everything off it while it ran on a single channel. That was inconvenient but the redundancy paid off. We didn't lose anything.
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From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Jeffrey Beckstrom Sent: Monday, November 03, 2008 7:24 AM
To: oracle-l-freelists; oracle-db-l
Subject: 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.
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