Hi allSCOM 2007 upgraded to R2 last week, 3am on Saturday it ran the "Logical disk Fragmentation level" alert monitor and has reported that every one of my Database LUNs is fragmented over 90%.6 Active\Passive SCC custers on Windows 2008, Exchange 2007 SP1. 28 Storage Groups per Server, 4 ISCSI luns allocated to each server for the Databases, 7 Databases on each.The alertsare as follows:""The disk I: (I:) on computer"EXMB05A.domain" has high fragmentation level. File Percent Fragmentation value is 92%. Defragmentation recommended: true.""What I am after is a reasonable way of determining what exactly this means and what should be done? I want to understand how this level of fragmentation occurs (Any documentation references appreciated) and whether it is truly essential to defragment urgently. It seems to be that this high level of fragmentation is reached very easily on our systems. The LUNs in question do also hold the indexes for the databases.Any ideas of how to approach this? Running file defrag very frequently is something I want to avoid (Online maintenance happens every night for 4 hours and takes only 2 days to perform a cycle for each Storage group - so internal DB fragmentation should not be an issue).Tom

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