Dissimilar hardware is not an issue in clustering. It is supported. But make sure you match the memory resources and processing power for all nodes. Regards, Raj Periyasamy Senior Systems Integration Engineer PR Newswire, HS, Jersey City, NJ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Amy Kohler <akohler@xxxxxxxxxxxxx> Sent: Thursday, June 18, 2009 12:22 PM To: <exchangelist@xxxxxxxxxxxxx> Subject: [ExchangeList] Re: OWA Exchange 2003 with ISA 2006 problem Hello All, Building a second datacenter and was wondering if any of you see any issues with and Exchange 2007 cluster on Dell 2900's failing over to a cluster that is on Dell 2950's? Would the different hardware be an issue? CCR clusters, but both active /passive here and active/passive there. Thanks in advance! Amy Kohler Server Support Engineer Scottrade, Inc. 314-965-1555 ext. 1646 All e-mail sent to and from this address will be retained by the Scottrade corporate e-mail system and is subject to review by someone other than the recipient. E-mail transmissions may not be secure; contact us at 1-800-619-SAVE for more information.