I am putting together a new Exchange 2003 Server which will run on Windows 2003 R2. I have about 260 users. There is a front-end webmail server. The new server has eight 36GB SAS drives. I'm aware of the recommendation to seperate out the EDB and STM files to their own drive but I've also seen that the Log files and Temp files should also be on their own drives as well. That would mean the following:
2x36GB drives mirrored - OS
2x36GB drives mirrored - TEMP and TMP directories
2x36GB drives mirrored - Exchange log files
2x36GB drives mirrored - Exchange EDB and STM files
Seems like quite a bit of wasted space. I can understand putting the Info Store on it's own drive since it's getting a lot of read-write activity but I think that the OS, temp and log files could reside on the same volume.