Shock And Vibration; Reliability; Shock And Vibration Specification - Fujitsu MPG3XXXAH Product Manual

1.6

Shock and Vibration

Table 1.6 lists the shock and vibration specification.
Vibration (swept sine, one octave per minute)
• Operating
• Non-operating
Shock (half-sine pulse, Operating)
• 2 ms duration
Shock (half-sine pulse, Non-operating)
• 2 ms duration
1.7

Reliability

(1) Mean time between failures (MTBF)
The mean time between failures (MTBF) is 500,000 POH (power on hours) 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=
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.
(3) CSS cycle
The number of CSS must be less than 50,000.
Table 1.6

Shock and vibration specification

4.9 m/s
(without non-recovered errors)
39.2 m/s
392 m/s
2940 m/s
C141-E112-01EN
2
(0.5G0-P); 5 to 300 Hz
2
(4.0G0-P); 5 to 400 Hz (no damage)
2
(40G0-P) (without non-recovered error)
2
(300G0-P) (Typical, no damage)
(H)
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