This might help, http://support.microsoft.com/default.aspx?scid=kb;en-us;816307 HTH. Regards, Raj Periyasamy MCSE(Messaging), CCNA ________________________________ From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Tom Kern Sent: Wednesday, September 06, 2006 1:27 PM To: ExchangeList Subject: [ExchangeList] Dynamic disks If you are deploying Exchange on a SAN(Clariion), does it matter if you use Basic or Dynamic disks? Is one better than the other? If so, why? I can't seem to find any info on using dynamic disks with Exchange(except that it won't work for the shared storage on a cluster). Any info would be great. Thanks alot