The numbers of hours, on average, can these hard drives be expected to operate before failure is 24 hours a day, also seven days a week and 365 days a year.
The total life-time of a hard disk is said to be 5 years" that is about 43,800 hours of been in constant use.
Note that a key reliability-linked criterion for the selection of storage components is based on its operating duty that is the numbers of many hours in a day a drive can be active for.
A lot of HDDs used by Enterprise-class applications are said to be optimized for constant use that is 24 hours a day, seven days a week, and 365 days a year.
Note that a Managed Service Provider (MSP) have to plan for a failure in every 1000 hours that is about 42 days.
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