Hitachi HUS157336EL3800 2 Environmental conditions and reliability, K6602906, 11/46, 2003/6/12

3.2 Environmental conditions and reliability

Table 3.2 Environmental conditions and reliability

	Item		Ultrastar 15K73-73		Ultrastar 15K73-36
Environmental		operating	5 to 55°C
conditions	Temperature	non-operating	-40 to 70°C
		storage/shipping	-40 to 70°C
	Temperature gradient		20°C per hour maximum
	Humidity	operating	5 to 90%RH
		non-operating	5 to 90%RH
	Wet bulb temperature		29°C maximum (non condensing)
	Atmosphere		No corrosive gas, saline atmosphere
			or organic-metal compound
			(Example. organic silicon,organic tin)
	Altitude	operating	-300 to 3,000 m
		non-operating	-300 to 12,000 m
	Magnetic field		400 micro Tesla maximum
Shock and	Vibration	operating	9.8 m/s2(1.0G) maximum
vibration	(see Note 6)	non-operating	49 m/s2(5.0G) maximum
	Shock	operating	147 m/s2(15G) maximum			[11ms]
	(see Note 7)	non-operating	735 m/s2(75G) maximum			[11ms]
			2450m/s2(250G) maximum			[2ms]
Acoustic noise	Acoustic noise (see Note 8)		3.7 bel average		3.6 bel average
Reliability	Data Reliability (see Note 9)		Recoverable error:	10 error in 1012bits read
			Non-recoverable error: 1 error in 1014bits read
	Seek error rate (see Note 9)		10 errors in 108 seeks
(see Note 10)	Life		5 years (Surface temperature of HDA is 45°C or less)
			Life of the drive does not change in the case that the
			drive is used intermittently. (See section 8.6)
	MTBF (see Note 11)		Expected 1,200,000 hours

Drawing No. Sheet No. Revision 5
K6602906	11/46	2003/6/12