I can not say whether Exchange on a SAN is supported or not...not my position. IBM Global Services salespeople have mentioned Exchange being used on a SAN and using Tivoli to back it up. I would expect it to be able to handle it. I have had Exchange 5.5 servers operating off a Compaq Fibre Array 4100 for external storage...100 MBPS links and an external Gateway array, but never a SAN. If it looks like a drive to the server and performance is good, it should work.
Someone had mentioned on here about having to down Exchange, the server, etc to expand space if it were on a SAN. While this may be true for 5.5, one can always add another "Storage Group" or possibly even another "Mailbox Store" and move messages with Exchange 2000. HOWEVER, the SAN person did mention the Performance Optimizer...therefore not yet E2K and still on 5.5. My suggestion is to seriously consider Exchange 2000 and Active Directory. It will make your life a whole lot easier when it comes to expansion and also policies on mailboxes (students 20MB, faculty 500 MB (students mailing projects instead of putting them on a shared drive, etc).) Exchange 2000 is great. I am looking forward to Kodiak (Exchange .Net or whatever). It is supposedly going to leave the Jet database in favor of RDBMS...SQL .Net. Technology has really advanced going from 5.5 to 2000. Who knows, with .Net, it may actually be supported on a SAN...but it may require the SAN vendor to certify it and all that stuff. Bob List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
