Location of MSSQL system database files - revisited

The host computer has 2x Intel Xeon 4C 2.40ghz CPU and 32 GB ram.
Operating system is Win 2008 R2 SP1.
MSSQL is installed on the same system disk as the OS.
The system disk is a virtual volume comprising 4x 10K 6Gbps SAS disks configured as RAID 5.
All system database files are located on this volume.
A second volume is made up of a RAID 10 array of 12x 15K 6Gbps SAS disks.
User database files are stored on the second volume.
Under consideration is moving all system database files over to the second volume.
Question - would performance advantage (ceteris paribus) be significant enough to justify it?
Would appreciate very much some Experts comments.
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DBAduck - Ben MillerPrincipal ConsultantCommented:
Well, from my point of view, your TempDB would benefit very much from being moved to the second volume, but I don't think that the other System databases would benefit, performance wise.

TempDB is write intensive and would be a happy camper to be moved to that other disk.
garychuAuthor Commented:
Thanks, dbaduck.
You confirm what I can only suspect from inexperience.
Presently, there is only 1 tempdb (tempdb.mdf and templog.ldf) in the default directory.
Can I use the following to move it?
(tempdev and templog being the logical filenames)
USE master;
MODIFY FILE (NAME = tempdev, FILENAME = '<new path>\tempdb.mdf');
MODIFY FILE (NAME = templog, FILENAME = '<new path>\templog.ldf);
Your further advice would be appreciated.
DBAduck - Ben MillerPrincipal ConsultantCommented:
Yes, you can do that.  This command will move the locations of the files in the master database but will not actually create the tempdb files in the new location until you restart the SQL server service.

 You will want to add at least 1 more .ndf file to the TempDb.

ADD FILE (Name=tempdev2, FILENAME='<new path>\tempdb1.ndf')

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garychuAuthor Commented:
Thanks, Expert.
Got the confidence I need.
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Microsoft SQL Server 2008

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