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I have a server with three disks (all in raid1). What is the best organization of the files (system, data, indexes, log, backup, etc.) on the disks to improve performance? Thanks for your help.
It depends on usage patterns, but offhand I'd put the Oracle software on one drive, database files on the second, and redo logs and backup directories on the third, with control files multiplexed to the first and second drives. You can then observe your I/O patterns and, if you have hot spots, consider making changes in the layout (for example, if you don't have heavy transactional activity, you may be able to tolerate having redo logs on a drive containing other files accessed during normal database usage, instead of dedicating a drive to them for best performance).