2 ms·

I see they list an MTTF of 2.5 million device hours. That works out at ~285 years - is that really correct? (I'm not really familiar with what's considered norm

I see they list an MTTF of 2.5 million device hours. That works out at ~285 years - is that really correct? (I'm not really familiar with what's considered normal for devices of this class)

zamadatix 2y ago
As far as I understand it MTTF measured in device hours is meant to give expectation on how often to expect a failure when you buy a pool of devices and run them a reasonable amount of time (I.e. a number to tell you when you buy 2,000 of this how to calculate your expected failure interval) not necessarily "how long an individual device is expected to keep working".
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hnuser123456 2y ago
It means if you buy 1000 of them, one might die after 3-4 months, and another one or two within the first year.
magicalhippo 2y ago
This[1] page explains MTTF as follows: The MTTF is a statistical value that defines after how much time a first failure in a population of devices may occur (measured in hours). If MTTF is given as 1 million hours, and the drives are operated within the specifications, one drive failure per hour can be expected for a population of 1 million drives. For the more realistic quantity of 1000 drives, a Managed Service Provider (MSP) should plan for a failure every 1000 hours (almost 42 days). It also has some formulas to convert MTTF to Annualized Failure Rate (AFR). [1]: https://www.toshiba-storage.com/trends-technology/mttf-what-hard-drive-reliability-really-means/ https://www.toshiba-storage.com/trends-technology/mttf-what-...