The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Thomas Anderson - One of the best experts on this subject based on the ideXlab platform.
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a quantitative analysis of disk drive power management in portable computers
USENIX Winter Technical Conference, 1994Co-Authors: Roger Kumpf, Paul Horton, Thomas AndersonAbstract:With the advent and subsequent popularity of portable computers, power management of system components has become an important issue. Current portable computers implement a number of power reduction techniques to achieve a longer battery life. Included among these is spinning down a disk during long periods of inactivity. In this paper, we perform a quantitative analysis of the potential costs and benefits of spinning down the disk drive as a power reduction technique. Our conclusion is that almost all the energy consumed by a disk drive can be eliminated with little loss in performance. Although on current Hardware, Reliability can be impacted by our policies, the next generation of disk drives will use technology (such as dynamic head loading) which is virtually unaffected by repeated spinups. We found that the optimal spindown delay time, the amount of time the disk idles before it is spun down, is 2 seconds. This differs significantly from the 3-5 minutes in current practice by industry. We will show in this paper the effect of varying the spindown delay on power consumption; one conclusion is that a 3-5 minute delay results in only half of the potential benefit of spinning down a disk.
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USENIX Winter - A Quantitative analysis of disk drive power management in portable computers
1994Co-Authors: Kester Li, Roger Kumpf, Paul Horton, Thomas AndersonAbstract:With the advent and subsequent popularity of portable computers, power management of system components has become an important issue. Current portable computers implement a number of power reduction techniques to achieve a longer battery life. Included among these is spinning down a disk during long periods of inactivity. In this paper, we perform a quantitative analysis of the potential costs and benefits of spinning down the disk drive as a power reduction technique. Our conclusion is that almost all the energy consumed by a disk drive can be eliminated with little loss in performance. Although on current Hardware, Reliability can be impacted by our policies, the next generation of disk drives will use technology (such as dynamic head loading) which is virtually unaffected by repeated spinups. We found that the optimal spindown delay time, the amount of time the disk idles before it is spun down, is 2 seconds. This differs significantly from the 3-5 minutes in current practice by industry. We will show in this paper the effect of varying the spindown delay on power consumption; one conclusion is that a 3-5 minute delay results in only half of the potential benefit of spinning down a disk.
Roger Kumpf - One of the best experts on this subject based on the ideXlab platform.
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a quantitative analysis of disk drive power management in portable computers
USENIX Winter Technical Conference, 1994Co-Authors: Roger Kumpf, Paul Horton, Thomas AndersonAbstract:With the advent and subsequent popularity of portable computers, power management of system components has become an important issue. Current portable computers implement a number of power reduction techniques to achieve a longer battery life. Included among these is spinning down a disk during long periods of inactivity. In this paper, we perform a quantitative analysis of the potential costs and benefits of spinning down the disk drive as a power reduction technique. Our conclusion is that almost all the energy consumed by a disk drive can be eliminated with little loss in performance. Although on current Hardware, Reliability can be impacted by our policies, the next generation of disk drives will use technology (such as dynamic head loading) which is virtually unaffected by repeated spinups. We found that the optimal spindown delay time, the amount of time the disk idles before it is spun down, is 2 seconds. This differs significantly from the 3-5 minutes in current practice by industry. We will show in this paper the effect of varying the spindown delay on power consumption; one conclusion is that a 3-5 minute delay results in only half of the potential benefit of spinning down a disk.
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USENIX Winter - A Quantitative analysis of disk drive power management in portable computers
1994Co-Authors: Kester Li, Roger Kumpf, Paul Horton, Thomas AndersonAbstract:With the advent and subsequent popularity of portable computers, power management of system components has become an important issue. Current portable computers implement a number of power reduction techniques to achieve a longer battery life. Included among these is spinning down a disk during long periods of inactivity. In this paper, we perform a quantitative analysis of the potential costs and benefits of spinning down the disk drive as a power reduction technique. Our conclusion is that almost all the energy consumed by a disk drive can be eliminated with little loss in performance. Although on current Hardware, Reliability can be impacted by our policies, the next generation of disk drives will use technology (such as dynamic head loading) which is virtually unaffected by repeated spinups. We found that the optimal spindown delay time, the amount of time the disk idles before it is spun down, is 2 seconds. This differs significantly from the 3-5 minutes in current practice by industry. We will show in this paper the effect of varying the spindown delay on power consumption; one conclusion is that a 3-5 minute delay results in only half of the potential benefit of spinning down a disk.
Dylan J Boday - One of the best experts on this subject based on the ideXlab platform.
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Metal particulate-containing conformal coatings for improved IT Hardware Reliability in harsh environments
Journal of Materials Science, 2017Co-Authors: Jason T Wertz, J. T. Porter, J. P. Kuczynski, Jiuxing Zhang, Dylan J BodayAbstract:A method to overcome IT Hardware corrosion-related failures in geographies with highly concentrated atmospheric pollution is presented. Metal particulate was incorporated into a standard silicone conformal coating to form composite materials in which the metal particulate acts as a sacrificial material to react with elemental sulfur. Metal particulates (copper and silver) were chosen based on their strong propensity to corrode in sulfur-rich environments. Through absorption of sulfur into silicone composites, the metal particulate is able to react to form either copper sulfide or silver sulfide before reaching the underlying metallic architectures, thus preventing failures. This approach resulted in up to a ~123% life improvement of the coated component over that of a standard silicone conformal coating. In addition, this approach has shown that the sacrificial material can slow the rate of metal sulfide formation at the metallic interface of thick-film surface mount resistors. The metal particulate-containing conformal coatings developed here overcome many limitations brought about by the use of non-silicone conformal coatings, potentially leading to its incorporation into IT Hardware to prevent metallic corrosion of components in harsh environments.
L. Maria Arulraj - One of the best experts on this subject based on the ideXlab platform.
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A Study on Reliability of software metrics in Software products
International Journal of Research, 2020Co-Authors: L. Maria ArulrajAbstract:The objective of this research paper is to study about the software Reliability metrics. “Software Reliability is defined as the probability of failure-free software operation for a specified period of time in a specified environment”. Software Reliability is different from Hardware Reliability. Achieving Software Reliability is hard because the complexity of software tends to be high. Software Reliability can be categorized into 3 parts : modeling, measurement & improvement. Various approaches can be used to improve the Reliability of the software, however, it is hard to balance development time and budget with software Reliability. But the best approach to assure software Reliability is develop a Reliability metrics. This article article provides an overview of Software Reliability measurement techniques.
Paul Horton - One of the best experts on this subject based on the ideXlab platform.
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a quantitative analysis of disk drive power management in portable computers
USENIX Winter Technical Conference, 1994Co-Authors: Roger Kumpf, Paul Horton, Thomas AndersonAbstract:With the advent and subsequent popularity of portable computers, power management of system components has become an important issue. Current portable computers implement a number of power reduction techniques to achieve a longer battery life. Included among these is spinning down a disk during long periods of inactivity. In this paper, we perform a quantitative analysis of the potential costs and benefits of spinning down the disk drive as a power reduction technique. Our conclusion is that almost all the energy consumed by a disk drive can be eliminated with little loss in performance. Although on current Hardware, Reliability can be impacted by our policies, the next generation of disk drives will use technology (such as dynamic head loading) which is virtually unaffected by repeated spinups. We found that the optimal spindown delay time, the amount of time the disk idles before it is spun down, is 2 seconds. This differs significantly from the 3-5 minutes in current practice by industry. We will show in this paper the effect of varying the spindown delay on power consumption; one conclusion is that a 3-5 minute delay results in only half of the potential benefit of spinning down a disk.
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USENIX Winter - A Quantitative analysis of disk drive power management in portable computers
1994Co-Authors: Kester Li, Roger Kumpf, Paul Horton, Thomas AndersonAbstract:With the advent and subsequent popularity of portable computers, power management of system components has become an important issue. Current portable computers implement a number of power reduction techniques to achieve a longer battery life. Included among these is spinning down a disk during long periods of inactivity. In this paper, we perform a quantitative analysis of the potential costs and benefits of spinning down the disk drive as a power reduction technique. Our conclusion is that almost all the energy consumed by a disk drive can be eliminated with little loss in performance. Although on current Hardware, Reliability can be impacted by our policies, the next generation of disk drives will use technology (such as dynamic head loading) which is virtually unaffected by repeated spinups. We found that the optimal spindown delay time, the amount of time the disk idles before it is spun down, is 2 seconds. This differs significantly from the 3-5 minutes in current practice by industry. We will show in this paper the effect of varying the spindown delay on power consumption; one conclusion is that a 3-5 minute delay results in only half of the potential benefit of spinning down a disk.
