Fujitsu MBA3073FD, Руководство по эксплуатации продукта

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2.1 Hardware Specifications
(2) Mean Time To Repair (MTTR)
MTTR is the average time taken by a well-trained service mechanic to diagnose and repair an HDD
malfunction. The HDD is designed for a MTTR of 30 minutes or less.
(3) Service life
The service life under suitable conditions and treatment is as follows.
The service life is depending on the environment temperature. Therefore, the user must design the
system cabinet so that the average DE surface temperature is as low as possible.
•
DE surface temperature: from 5ºC to 40ºC 5 years
•
DE surface temperature: from 41ºC to 45ºC 4.5 years
•
DE surface temperature: from 46ºC to 50ºC 4 years
•
DE surface temperature: from 51ºC to 55ºC 3.5 years
•
DE surface temperature: from 56ºC to 60ºC 3 years
•
DE surface temperature: more than 60ºC or less than 5ºC
No guarantee (Keep the DE surface
temperature from 5
°
C to 60
°
C.)
Even if the HDDs are used intermittently, the longest service life is 5 years.
The maximum storage period without turning the power on is six months.
Note:
The "average DE surface temperature" means the average temperature at the DE surface
throughout the year when the HDDs are operating.
(4)
Data security at power failure
Integrity of the data on the disk is guaranteed against all forms of DC power failure except on blocks
where a write operation is being performed. The above does not applied to formatting disks or
assigning alternate blocks.
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