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Running Linux, Fourth Edition

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Getting Your Linux Hard Drive to Run Faster

Publication:DatamationDate:Apr 20 2009

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To get data on or off a disk, a drive head has to swing into the correct position and wait for the right part of the disk to come around. This can take hundredths of a second - many times longer than it takes to access data stored in RAM, for example. As a result, a disk I/O subsystem can be a huge data bottleneck, and significant improvements in the overall performance of the server can be achieved if the effects of this bottleneck can be minimized.


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