Disk performance is very important to overall system performance, so being able to optimize disk performance is a valuable skill to possess. Doing so begins with understanding the benefits of both of the major disk interface standards, ATA and SCSI. Knowing how to select and configure disk interface hardware can also help you get the most out of your disk. Even partition placement can play a role; by putting heavily used partitions where they'll yield the best performance, you can improve overall disk performance, even without tweaking the hardware settings. Linux treats removable media differently than do many other OSs, so picking the appropriate media and setting them up properly are very important skills.
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