Hi Everyone, this is my first post here.  This weekend I am re-configuring the RAID configuration on our database server running Windows Server 2003 and SQL Server 2005. The Server has 6 disks of identical size. The current setup is a single RAID 5 array with 5 disks and one hot spare, with the OS on one partition, and the database files and transaction logs on another. Obviously this is not a good configuration for SQL server as the OS, database and transaction files are all on the same logical disk. We believe that we have had some disk contention issues, which we hope will be resolved by changing the RAID setup to put the OS, Data and Transaction files on separate logical disks. The new planned setup is: Logical Disk 0: RAID 1 mirror - OS and SQL Server program files Logical Disk 1: RAID 1 mirror - Database data files. Logical Disk 2: RAID 1 mirror - Transaction log files. We only have a single server available to us, so we can't carry out this change side by side. I am worried about making sure the databases are backed up and restored properly, so that they functional when we restore the server. The process I am planning on following for this is: Change the startup parameters of SQL server to the new location of the "Master" database and transaction log files Run Alter database commands to change the location of the other system databases and the user databases. Stop the SQL Server instance. Backup the C: drive and system state, and save to disk on another server over the network. Backup the D: drive containing the database and transaction files to another server over the network. Shut down the server. reboot the server and configure the RAID arrays as above. Carry out a clean Windows install, and get the network connection up and running Copy the backups back to the server Restore the C: and System state over the clean windows install. Restore the D: drive backup to a temporary location on Disk 0 Move the database files to the new location on Disk 1 Move the transaction log files to the new location no Disk 2 Start SQL Server in Master only recover mode, change the "FILENAME" path to the new location of the master database and log files. Move the Resource database data and log files to the same location as the Master DB data files. Restart SQL Server. I will be following the instructions from SQL Server 2005 Books Online: Moving System Databases: http://msdn.microsoft.com/en-us/library/ms345408(SQL.90).aspx Moving User Databases: http://msdn.microsoft.com/en-us/library/ms345483(SQL.90).aspx Am I going to make an huge mistakes by following the above procedure? Has anyone else gone through the same process themselves and found any big problems.