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Topic: Annualized failure rate

	Failure rate - Wikipedia, the free encyclopedia
		For example, in an automobile, the failure of the FM radio does not prevent the primary operation of vehicle, so that it may be desirable to differentiate the failure rates of critical versus non-critical failures.
		One drawback of the MTBF is that it assumes that the failure rate is constant for all intervals.
		Under certain engineering assumptions, the failure rate for a complex system is simply the sum of the individual failure rates of its components, as long as the units are consistent, e.g.
	www.wikipedia.org /wiki/MTBF (1476 words)

	Mean time between failures -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-17)
		Specifically, it is the reciprocal of the sum of the failure rates of the components of the system (with the failure rates being expressed in failures per hour).
		Failure of the component may be covered in the system using (The attribute of being superfluous and unneeded) redundancy or (Click link for more info and facts about fault-tolerance) fault-tolerance.
		For example, the failure of a single (1/16 ounce or 1.771 grams) DRAM (A group of government agencies and organizations that carry out intelligence activities for the United States Government; headed by the Director of Central Intelligence) IC within an error-correcting computer memory system may not cause a failure of the overall memory system.
	www.absoluteastronomy.com /encyclopedia/M/Me/Mean_time_between_failures.htm (1016 words)

	Estimating Drive Reliability in Desktop Computers Consumer Electronics Systems
		By subtracting the cumulative-percent-failure rates for two different times (t1 and t2), and using appropriate values for Beta and Eta25, we can estimate the percent of drives that are likely to fail at 25 C during any time interval t1 to t2.
		To estimate the AFR for the first year of drive operation in a desktop computer setting, we assume that the drive is used at a rate of 2,400 power-on-hours (POH) per customer year.
		Since failure rates would, if anything, decline over time, this would be a conservative estimate of averaged MTBF for the life of the drive.
	www.digit-life.com /articles/storagereliability/index.html (2632 words)

	A better way to predict disk failures
		All disk drive manufacturers happily publish their products' mean time between failure (MTBF) ratings, numbers like 500,000 hours for desktop-class drives, or 1 million hours for SCSI and Fibre Channel drives.
		Rather, it's a statistical metric derived from testing of a large number of drives for a number of days, and determining the mean failure rate for the entire group, explains Aloke Guha, chief technology officer at Copan Systems, a startup that makes a disk-based backup system built with low-cost ATA drives.
		AFR is calculated according to the number of drives that are returned to the manufacturer and deemed to indeed be defective.
	whatis.techtarget.com /tip/1,289483,sid5_gci1023932,00.html (542 words)

	Estimated FIT rates for current-production Myrinet-2000 components
		Although a mechanical failure of these excellent fans prior to 100,000 hours (11 years) would be unusual according to the L10 data, the fan tray is an FRU (field-replaceable unit).
		Until we have sufficient field experience with the failure rates, we have assigned a provisional FIT rate of 200 to the enclosure.
		The failure rate is the same for the M3-SW16-8F and M3-SPINE-8F because the boards are nearly identical except for the Myricom XBar16 chip, and its FIT rate is very small (statistically less than 5).
	www.myri.com /myrinet/FIT (1541 words)

	Dictionary of Meaning www.mauspfeil.net (Site not responding. Last check: 2007-10-17)
		'''Annualized failure rate''', or short '''AFR''' is the reciprocal of the MTBF expressed in Julian_year years and percent.
		You can expect about 0.73 percent of the population to fail in the average Julian_year year.
		There you find a list of all editors and the possibility to edit the original text of the article Annualized failure rate.
	www.mauspfeil.net /Annualized_failure_rate.html (128 words)

	Myrinet hardware reliability
		You are right that the great majority of these failures are failures of the laser diode (the light emitter).
		In our monthly monitoring of failure rates, we observed zero transceiver failures in the first 5 months and ~30M hours of field operation, causing us to believe initially that these transceivers were quite reliable.
		I have had a higher failure rate of switch ports versus PCI cards like you have seen...
	www.beowulf.org /archive/2003-February/009398.html (673 words)

	Rob Slade's Security Glossary (Site not responding. Last check: 2007-10-17)
		if the false acceptance rate and false rejection rate are graphed as the sensitivity of a security system is varied, false acceptance will start off at a high value and fall, whereas false rejection will start off with a low value and climb.
		The point at which the graph of the FAR crosses that of the FRR is the crossover error rate, and is generally considered to be a reasonable overall measure of the accuracy of a system.
		The overriding principle is that failure of one part or component will not result in the failure or termination of the system as a whole.
	www.soci.niu.edu /~rslade/secgloss.htm (14720 words)

	Annualized failure rate -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-17)
		Annualized failure rate -- Facts, Info, and Encyclopedia article
		Annualized failure rate, or short AFR is the (Something (a term or expression or concept) that has a reciprocal relation to something else) reciprocal of the (Click link for more info and facts about MTBF) MTBF expressed in (A period of time containing 365 (or 366) days) years and percent.
		For example, a typical disk drive (Click link for more info and facts about MTBF) MTBF number may be 1,200,000 hours.
	www.absoluteastronomy.com /encyclopedia/a/an/annualized_failure_rate.htm (151 words)

	VERIBANC's Rating System: Balanced and Effecient. (Site not responding. Last check: 2007-10-17)
		A Two Stars rating is applied to a bank that has three volatile periods of asset growth/shrinkage over the past ten quarters.
		An Investment Grade Rating or Better - In 1994, the VERIBANC Green, Three Stars rating was recognized by the Office of Management and Budget as an investment grade or better rating and as such was acceptable for a letter of credit in which the U.S. Government is the beneficiary.
		There is not much value in a rating system if over 30 percent of the industry has a lower rating - that is just not consistent with the average number of failures since 1991.
	www.veribanc.com /RatingSystem.htm (2814 words)

	Elsmar Forum Index - SPQL, EFR, FITS and IFR - Seeking Definitions for (Site not responding. Last check: 2007-10-17)
		The FIT rate is defined as the expected number of component failures per 10^9 (ten to the ninth power, or 1,000,000,000) hours.
		For example, the FIT rate of a current-production M3F-PCIXD-2 interface is 200, the sum of the FIT rate of the fiber transceiver, 125, and the FIT rate of all other component failures, 75.
		A FIT rate of 200 corresponds to an MTBF of 109/200 = 5M hours, and to an AFR of (200 * 8760)/109 = 0.00175 = 0.175%.
	elsmar.com /Forums/index/topic/9875-1.html (430 words)

	Integrated Solutions - Your White Collars Could Use Some Starch (Site not responding. Last check: 2007-10-17)
		When workers regularly grab those notebooks from their desktops and head outside the building, that rate can jump to as high as 30%." According to Poehler, rugged notebooks and tablets, by contrast, can push those failure rates way down - to below 10%.
		Annualized failure rates as high as 80% to 90% have been reported for that kind of design." By contrast, the trend in antenna design for rugged notebooks and tablets is to integrate the antenna as part of the unit - building it into the casing and protecting it with metal enclosures or damping bumpers.
		Beyond the reliability of the physical antenna, wireless communications depend on the rugged device's ability to accommodate current and emerging data transmission standards and protocols.
	www.integratedsolutionsmag.com /articles/2003_03/030308.htm (1096 words)

	Epogen Warnings & Precautions - Epoetin alfa - HealthScout
		Increased mortality was observed in 634 patients randomized to a target hematocrit of 42% (221 deaths [35% mortality]) compared to 631 patients targeted to remain at a hematocrit of 30% (185 deaths [29% mortality]).
		While the relationship between seizures and the rate of rise of hematocrit is uncertain, it is recommended that the dose of EPOGEN (r) be decreased if the hematocrit increase exceeds 4 points in any 2-week period.
		However, the risk of thrombotic events, including vascular access thrombosis, was significantly increased in adult patients with ischemic heart disease or congestive heart failure receiving EPOGEN (r) therapy with the goal of reaching a normal hematocrit (42%) as compared to a target hematocrit of 30%.
	www.healthscout.com /rxdetail/1/103/3/main.html (2654 words)

	Hard Drive Glossary Of Terms From Western Digital
		Hard drives have an increasing range of disk transfer rates from the inner diameter to the outer diameter of the disk.
		The rate at which the hard drive sends and receives data from the controller.
		The burst mode transfer rate is separate from transfer rate, as it refers only to the transfer of data into RAM.
	www.michigandatarecovery.com /harddriveglossary.html (6606 words)

	Failure (Site not responding. Last check: 2007-10-17)
		December 1, 2004 -- Heart failure is a common, progressive, complex clinical syndrome with high morbidity and mortality.
		December 1, 2004 -- Optimal outpatient treatment of systolic heart failure has three goals that should be pursued simultaneously: (1) control of risk factors for the development...
		June 1, 2004 -- Diastolic heart failure, a major cause of morbidity and mortality, is defined as symptoms of heart failure in a patient with preserved left ventricular...
	www.articlesgalore.com /documents/Category:Failure (460 words)

	3. Technical and Economic Fundamentals of Hypercommunication (telephone and computer) networks (Site not responding. Last check: 2007-10-17)
		The sending data rate itself is a function of the conduit's bandwidth (capacity), the conduit's signal-noise ratio, and the encoding process.
		The data rate objective is a function of bandwidth (conduit carrying capacity, the signal-noise ratio, and encoding).
		Unlike animal generations, however, the gestation period is shortening at an increasing rate as a function of technological change.
	www.hypercommunication.net /c3web.html (15927 words)

	[No title] (Site not responding. Last check: 2007-10-17)
		2 Annualized* average applicable only to the time period after final installation to the end of the specified Component Design Life.
		4 Average defects per million rate* is measured by our customers through their final installation.
		Based on failures that are verified as chargeable to Maxtor.
	cdh.bsd.st /drives/maxtor/ide/25084a.txt (135 words)

	[No title]
		If the dealer can't provide AFR (and they usually can't), back it out of the EW price.
		Use the "future value" of the payment(s), at a reasonable interest rate, to compute the percentage.
		Furthermore, since you often pay a lump sum up front, the seller is getting the use of your money, plus a free ride during the manufacturer's warranty period (which is when the bulk of the failures occur anyway).
	www.access-one.com /rjn/consumer/extended-warranty.txt (825 words)

	Seagate's Five-Year Warranties, 3 August 2004
		But internal disk failures can be catastrophic events if data is lost.
		We think we have the lowest AFR [Annualized Failure Rate] in the industry as a result.
		As with rolls of vacation film or the contents of an overnight letter, the true cost of a loss can't be measured merely in amount paid.
	www.warrantyweek.com /archive/ww20040803.html (2379 words)

	Drive Failure Hard Rate - Hard Drive Data Recovery (Site not responding. Last check: 2007-10-17)
		drives are also failing but the failure rate is very much lower...
		Rate Data Recovery hard drive data recovery services and retrieval of lost data from virus attack and mechanical failure.
		The annualized failure rate for a drive is derived from time-to-fail data collected during a...
	www.harddrivedatarecovery.us /resources/17/drive-failure-hard-rate.html (481 words)

	Tom's Hardware Guide Columns: Rant-O-Matic: When Hard Drive Warranties And Expectations Collide - Time To Face Off, ... (Site not responding. Last check: 2007-10-17)
		Seagate - Most hard drive failures today are the result of damage that occurs during shipping, handling and installation, and the vast majority of product returns occur within the first 5 months of shipment.
		Western Digital - WD HDD specifications state a less than 0.8% annualized failure rate (AFR), which means that on average less than 8 in 1,000 hard drives will fail over the course of one year.
		The predominant factor that seems to cause the failure is handling damage.
	www.tomshardware.com /column/200210141/hdwarranties-02.html (1240 words)

	TiVo Community Forums Archives - How many have had a drive failure?
		Probability of the TiVo HD failure is 1 in 34 in any given year.
		I had hoped that when the video was freezing that it was a software glitch, but I have come to accept that it is another drive failure.
		To the best of my knowledge, hard drive failure rate is about.5% per year (Maxtor Product specifications for Quantum LCT20 drive lists an annualized failure rate: andlt;.05%); same failure rate was also mentioned by Jim Barton at one of his speeches.
	archive.tivocommunity.com /tivo-vb/history/topic/3599-1.html (1901 words)

	Ops A La Carte Benchmarking & Gap Analysis
		For both Performance and Process Benchmarking, the first step is to develop a set of reliability and quality metrics for your product.
		Mean Time Between Failure (MTBF), Availability, Annualized Failure Rate (AFR) and Dead on Arrival (DOA) rate are very common.
		The best method for determining these levels is to benchmark the metrics against other companies.
	www.opsalacarte.com /Pages/reliability/reliability_con_bench.htm (840 words)

	Heart Failure Template Computerized Data Collection Tool Results (Site not responding. Last check: 2007-10-17)
		the event of a failure of their computer-based operational...
		Heart rate should be considered as an additional measure in the test and evaluation tool...
		assess computerized algorithm for the estimation of the fetal heart rate baseline...
	www.data-collection05.com /directory/heart-failure-template-computerized-data-collection-tool.html (529 words)

	Western Digital moves to limit ruckus over hard drive warranties
		WD HDD specifications state a less than 0.8% annualized failure rate (AFR), which means that on average less than 8 in 1,000 hard drives will fail over the course of one year.
		We will not comment on behalf of Maxtor, but Western Digital provides AFR (Annual Failure Rate) figures to demonstrate reliability.
		All WD products are rated at less than 0.8% AFR.
	www.theinquirer.net /?article=5612 (1133 words)

	wiki/Annualized failure rate Definition / wiki/Annualized failure rate Research (Site not responding. Last check: 2007-10-17)
		wiki/Annualized failure rate Definition / wiki/Annualized failure rate Research
		Annualized failure rate, or short AFR is the reciprocalIn mathematics, the reciprocal, or multiplicative inverse, of a number x is the number which, when multiplied by x, yields 1.
		Every complex number except zero has a reciprocal that is a complex number.
	www.elresearch.com /wiki/Annualized_failure_rate (136 words)

	[No title]
		Players DO exist that can play at least one of these discs (many can't), and comparisons of failure modes are interesting in any case.
		There are conflicting reports concerning error/mute rates using a stabilizer.
		There are reports that all CD cleaners will increase the error rate of a mint-condition CD.
	www.access-one.com /rjn/laser/legacy/ld94.txt (4576 words)

	The Tech Report - Maxtor's Atlas 15K hard drive - Page
		Maxtor claims that the Atlas 15K has read and write seek times of 3.4 and 3.8 milliseconds, respectively—more than a millisecond quicker than the Atlas 10K IV.
		However, the Atlas 15K's maximum sustained transfer rate of 75MB/s is only 3MB/s better than the Atlas 10K IV.
		Based on the drive's 0.7% annualized failure rate, its mean time between failures is over 1.2 million hours or about 143 years.
	www.tech-report.com /reviews/2003q3/atlas-15k/index.x?pg%3D1 (515 words)

	EETimes.com - Hot-plug memory curtails server downtime
		A percentage of these errors will be multibit errors that ECC cannot correct, so the potential for a failure in ECC systems also increases with memory capacity.
		A 1-Gbyte memory subsystem, common in a server today, utilizing an ECC algorithm with single-bit error correction, would have an annualized failure rate of about three percent.
		However, a complex server system with a 16-Gbyte memory subsystem would have an annualized failure rate of nearly 50 percent.
	www.eetimes.com /story/OEG20020109S0040 (1448 words)

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