If you use iSCSI, you can have a two node cluster setup to reference an external array (external array contains your drives). If you want more than two nodes, you will have to look at fiber attached storage or NAS/SAN devices. Definitely use Active/Passive for Exchange in a cluster environment. Couple of things - Is this cluster for mailbox servers or for Front End servers? If for front end servers and you have Windows 2003 as the OS, you may want to look into NLB (Network Load Balancing - high availability). Other things come into play based on your setup (such as mail filtering and maintaining identical filter Databases with your filtering software). Look at these options closely when designing your solution.... Also, do a quick search on MSExchange.org as there are detailed tutorials for 2 node clustering of servers for Exchange Mailbox servers. For front end servers running OWA and RPC over HTTPS, I would recommend Network Load Balancing. Contact me off list if you need any additional information after researching.... Chris _____ From: simon whale [mailto:simon@xxxxxxxxxxxxxx] Sent: Thursday, January 06, 2005 10:50 AM To: [ExchangeList] Subject: [exchangelist] RE: active passive clustering[Scanned] http://www.MSExchange.org/ All, I am looking into clustering for exchange using active / passive setup. Have looked at both Google and Microsoft and have found an abundance of information to read and I don't think much is relevant to what I am trying to find out. Can anybody point me to a good reference site or book? Or can anybody tell the answers to the following question 1. does clustering have to be setup on SCSI? Or can you use IDE? 2. do the machines has to be identical in hardware setup (this I believe is true but am unable to find this in black and white) many thanks for your help Simon ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: Chris.Wall@xxxxxxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify admin@xxxxxxxxxxxxxxx The views expressed in this email are those of the individual and not necessarily those of UK Data IT This footnote also confirms that this email message has been swept by SOPHOS AV for the presence of computer viruses. Web site: www.ukdatait.co.uk Registered Office: UK Data IT House, Shrub HIll Road, Worcester, WR4 9EF Registered Company Number: 3884834