I checked the fragmentation level of the SAN Volumes on one of our SQL 2000 servers yesterday. Drive look like this Boot O/S Drive: Volume fragmentation Total fragmentation = 25 % File fragmentation = 51 % Free space fragmentation = 0 % Trans Log Volume: Volume fragmentation Total fragmentation = 35 % File fragmentation = 71 % Free space fragmentation = 0 % SAN Volume for Main File group: Volume fragmentation Total fragmentation = 49 % File fragmentation = 99 % Free space fragmentation = 0 % There are 3 other volumes for other file groups that are in great shape. I have looked at Disk Defragging for SQL Server several times over years and I can never seem to find a definitive argument for doing it or not doing it. I am starting to think that maybe once a week after DBCC INDEXDEFRAG is done couldn't be a bad thing? I am looking at and have been playing with a trial of Diskeeper 2007 Server on a Dev / Test box works well so far without any apparent negitive impact on DB performance but, not as huge as our production DB's either. So, Defrag or No? That is the question.