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If two distributions have the same MTTF can it be concluded that the reliabilities given by the two distributions are of the same?
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What is the relation between mtbf mttf and mttr?
Mtbf=mttf+mttr
What is the relation between MTTR and MTBF?
Mtbf=mttf+mttr
How are raid levels determined?
Raid Levels are determined by MTTF/number. To determine the raid levels one should reference the standard raid levels and determine what raid level your data storage capacity needs.
How do you fix an LED display on a Alpine radio?
Sorry, you can't. led's are not light bulbs, ergo they have no filiment. They seldom fail. You can test the device, by unsoldering one end so it is isolated from circuitry, Then use a volt-ohm-meter on a high scale for ohms. place the leads from the meter (one lead on one end, the other on the other led lead. It is just a diode and should conduct in one direction only. if you get an open on the first try, reverse the meter leads and if the ratio is > 20 to 1 after reversing the leads, the LED is good, and you either have a voltage bias problem or a bad soldier connection. So the diode only conducts in one direction, if it doesn't conduct in either direction the led has an open junction, and is bad. If it conducts in both directions it has shorted junction. remember to keep your fingers off the leads because you are a high resistance impedance, and will give a false reading. Leds have a MTTF of about 20 years depending on the on/off time and current drawn when biased on. sorry MTTF= mean time to failure.
How much is a new hard drive for a computer?
As a rule of thumb, I'd deduct at least 50% depreciation per year. It's actual worth is dependent upon how old it is, what condition it is in, and how many hours it has actually been in use. Hard-drive manufacturers typically provide an MTTF (mean time to failure) expressed in hours. This is the average number of hours of continual use you can expect to get from a hard-drive before it is expected to fail. It is not an exact science, it is merely a guide figure, however, the closer a drive gets to its MTTF the less worth it has. Personally, I treat all second-hand drives with suspicion as it's hard to tell its true condition just by looking at it. You need to install it, inspect the SMART (self-monitoring and reporting tool) information, possibly reconfigure its geometry and soak test it for a week or two before deciding if its really fit for purpose. Even then, there's no guarantee it won't fail the moment you pay for it. At least if its an out-of-box failure you can get it replaced. You just don't get that sort of guarantee with a second-hand drive.
