Currently our environment consists of Windows 2000 clusters running
Exchange 5.5, these clusters are SAN attached.  We have experienced
several database corruptions  which has lead the operational guys to be
paranoid about MS Exchange running on clusters.

Our future plans are to move to Exchange 2003 with the BE being a 2 node
cluster, I have read whitepapers on clustering and have found several
things the operational guys have not done with the current environment (
updating the HBA drivers ).

They are paranoid that the exchange database structure, jet based, has
not changed and that clustering in 2003 is not vastly different to 2000
so we will experience more corruptions in the future resulting in the BE
servers requiring more support.  They want to move to single mailbox
servers, however this results in a single point of failure, but in there
mind will be more stable.

I appreciate that I am not presenting the full facts but was after
peoples views on clustering vs non clustering and what can be done to
ensure clusters are as stable as possible.

regards
P