HP Labs Technical Reports



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Loge: A Self Organizing Disk Controller

English, Robert M.; Stepanov, Alexander A.

HPL-91-179

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Abstract: While the task of organizing data on the disk has traditionally been performed by the file system, the disk controller is in many respects better suited to the task. In this paper, we describe Loge, a disk controller that uses internal indirection, accurate physical information , and reliable metadata storage to improve I/O performance. Our simulations show that Loge improves overall disk performance, doubles write performance, and can, in some cases, improve read performance. the Loge disk controller operates through standard device interfaces, enabling it to be used on standard systems without software modification.

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