Fujitsu MAF3364LC Manual/User Guide - Page 35
°C to 55°C
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(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 possible as low. • DE surface temperature: 40°C or less 5 years • DE surface temperature: 45°C or less 4.5 years • DE surface temperature: 46°C to 50°C 4 years • DE surface temperature: 51°C to 55°C 3.5 years • DE surface temperature: 56°C and more strengthen cooling power so that DE surface temperature is 55°C or less. Even if the IDD is used intermittently, the longest service life is 5 years. Note: The "average DE surface temperature" means the average temperature at the DE surface throughout the year when the IDD is 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. 2 - 6 C141-E064-03EN