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Donald K. Burleson

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In my incarnation as a sysop on the DBAPipeline at and the lazydba and Metalink forums I assist with, I answer newbie questions on a daily basis that can usually be answered by looking at the manuals. Don’t waste support analysts’ (and my) time by asking us questions that you can answer yourself. Besides, I have found I learn better if I look it up rather than have someone tell me; I’m sure you have had the same experience. If you ask a question that is easily looked up in Oracle manuals, I may answer “RTFM,” which stands for "Read the f****** manual."

Oracle Disk Layout

If you’ve read up to this point, you should realize that disk layout is critical to efficient operation of Oracle systems. There are several questions you need to answer when designing your disk layout:

* What are the sizes of, and available space on, the disks or arrays to be used with Oracle?
* Is this disk or array used for other non-Oracle applications?
* Has the disk been defragmented (if needed)?
* Is this a raw device (if UNIX)?
* What is the speed of the disk or disks in the array; or what is the I/O saturation point of the controller channel?
* Is this a RAM or an optical disk?

Let’s look at each of these questions to determine how the answers affect Oracle:

This is an excerpt by Mike Ault’s book “Oracle Administration & Management”.  If you want more current Oracle tips by Mike Ault, check out his new book “Mike Ault’s Oracle Internals Monitoring & Tuning Scripts” or Ault’s Oracle Scripts Download.




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