Hitachi DK23DA-20F - 3.2 Environmental Specifications and Reliability

K6602705
Rev.3
08.20.01
- 15 -
3.2 Environmental Specifications and Reliability
Table 3.2 Environmental Specification and Reliability
No. Item Specification
DK23DA-
40F
DK23DA-
30F
DK23DA-
20F
DK23DA-
10F
1
Ambient
*1
Operational
5 to 55
°
C
temperature Non-operational
-40 to 70
°
C
*2
Temperature gradient
Max. 20
°
C /hour
2 Relative humidity Operational 5 to 90 %
Non-operational 5 to 95 %
Maximum wet Operational
29
°
C (without condensation)
bulb Non-operational
40
°
C (without condensation)
*3
3 Vibration Operational 1.0mm p-p or less (5 - 22Hz)
9.8 m/s
2
(1.0G) or less m/s
2
(22 – 500Hz)
Non-operational 5mm p-p or less (5 – 22Hz)
49m/s
2
(5G) or less (22 – 500Hz)
4
Shock
*6
Operational
1,764m/s
2
(180G) or less (2 ms, half sine wave)
Non-operational
7,840m/s
2
(800G) or less (1 ms, half sine wave)
5 Atmospheric condition Without corrosive vapors or salt
Idle Typical 2.4 Bels6 Acoustic-noise
*4
seek Typical 3.1 Bels
7 Height Operational 3,000m or less
(Altitude) Non-operational 12,000m or less
Height gradient Max. 300m/min.(3.1kpa/min.)
8
(
*5
)
Data reliability
(with retries and ECC)
Less than 1 non-recoverable error in
10 E 13 bits read
9 External magnetic field 1,500 micro Tesla (DC) or less
*1
:Ambient temperature should be measured at point 10 mm away from the nameplate of the drive. If the
maximum operational ambient temperature cannot be measured at a point 10 mm away from the
nameplate, a substitution method is stipulated in the table below.
Ambient
temperature
Temperature at cover
(Point A)
55
°
C62
°
C
5
°
C5
°
C
*2
:In case the ambient temperature is -40 to 0
°
C, the drive should be
packed in HDD package box. Please see specification 5.1 Packing
for reference.
Maximum power-off interval is 12 months.
*3
:In case of the maximum wet bulb 40
°
C , the drive should be packed in HDD package box with ESD bag
and desiccant. Please see specification 5.1 Packing for reference. If the drive is not packed in the HDD
package box with ESD bag and desiccant, maximum wet bulb 29
°
C is applied.
Caution
Measurement point
(Point A
）