Shock And Vibration; Reliability; Table 1.6 Shock And Vibration Specification - Fujitsu MHA2021AT Product Manual

Device Overview

1.6 Shock and Vibration

Table 1.6 lists the shock and vibration specification.

Table 1.6 Shock and vibration specification

Vibration (swept sine, one octave per minute)
• Operating
• Non-operating
Shock (half-sine pulse, 2 ms duration)
• Operating
• Non-operating

1.7 Reliability

(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:
MTBF=
"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.
1-8
5 to 500 Hz, 1.0G0-peak
(without non-recovered errors) (9.8 m/s
5 to 500 Hz, 5G0-peak (no damage) (49 m/s
100G0-peak
(without non-recovered errors) (980 m/s
500G0-peak (no damage) (4,900 m/s
Total operation time in all fields
number of device failure in all fields
2
2
2
0-peak)
(H)
C141-E042-01EN
0-peak)
2
0-peak)
0-peak)