Fujitsu MHA2032AT Manual Do Utilizador

1-8

C141-E042-01EN

Table 1.6 lists the shock and vibration specification.

Vibration (swept sine, one octave per minute)

• Operating

• Non-operating

5 to 500 Hz, 1.0G0-peak
(without non-recovered errors) (9.8 m/s

2  

0-peak)

5 to 500 Hz, 5G0-peak (no damage) (49 m/s

2  

0-peak)

Shock (half-sine pulse, 2 ms duration)

• Operating

• Non-operating

100G0-peak
(without non-recovered errors) (980 m/s

2  

0-peak)

500G0-peak (no damage) (4,900 m/s

2  

0-peak)

(1) Mean time between failures (MTBF)

The mean time between failures (MTBF) is 300,000 H or more (operation: 24
hours/day, 7 days/week).

This does not include failures occurring during the first three months after
installation.

MTBF is defined as follows:

Total operation time in all fields

MTBF=

(H)

number of device failure in all fields

“Disk drive defects” refers to defects that involve repair, readjustment, or
replacement.  Disk drive defects do not include failures caused by external
factors, such as damage caused by handling, inappropriate operating
environments, defects in the power supply host system, or interface cable.

(2) Mean time to repair (MTTR)

The mean time to repair (MTTR) is 30 minutes or less, if repaired by a specialist
maintenance staff member.