Fujitsu MHC2032AT, MHD2021AT, MHC2040AT, MHD2032AT manual Shock and Vibration

							1.7 Reliability
1.6	Shock and Vibration
		Table 1.7 lists the shock and vibration specification.
		Table 1.7 Shock and vibration specification
Vibration (swept sine, one octave per minute)
•	Operating				5 to 500 Hz, 1.0G0-peak (MHC series)
					5 to 400 Hz, 1.0G0-peak (MHD series)
					(without non-recovered errors) (9.8 m/s2 0-peak)
•	Non-operating				5 to 500 Hz, 5G0-peak (MHC series)
					5 to 400 Hz, 5G0-peak (MHD series)
					(no damage) (49 m/s2 0-peak)
Shock (half-sine pulse, 2 ms duration)
•	Operating				100G0-peak
					(without non-recovered errors) (980 m/s2 0-peak)
•	Non-operating				500G0-peak (no damage) (4,900 m/s2 0-peak)
1.7	Reliability
(1) Mean time between failures (MTBF)
		Conditions of 300,000 h		Current time		250H/month or less 3000H/years
						or less
				Operating time		20% or less of current time
				CSS operations		50/day or less
						Total 50,000 or less
				Power on/off		1/day or more needed.
				Environment		5 to 55°C/8 to 90%
						But humidity bulb temperature
						29°C or less
		MTBF is defined as follows:
		MTBF=	Total operation time in all fields				(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.

C141-E050-02EN 1-9