Deskstar 7K400 Hard Disk Drive Specification
51
7.2.2 Corrosion test
The drive shows no sign of corrosion inside and outside of the hard disk assembly and is functional after being sub-
jected to seven days at 50°C with 90% relative humidity.
7.3 DC power requirements
Damage to the drive electronics may result if the power supple cable is connected or disconnected to the legacy
power connector while power is being applied to the drive (no hot plug/unplug is alloweed). If SATA power supply
cable is connected or disconnected to the SATA power connector, hot plug/unplug is allowed.
7.3.1 Input voltage
1
To avoid damage to the drive electronics, power supply voltage spikes must not exceed specifications.
2
+12V should be applied within 60 seconds after +5V is applied to the drive.
7.3.2 Power supply current (typical)
Except for a peak of less than 100 ms duration
1
Random seeks at 40% duty cycle
2
Seek duty = 30%, W/R duty = 45%, Idle duty = 25%
Table 47: Input voltage
Input voltage supply
2
During run and spin up
Absolute max spike
voltage
1
Supply rise time
+5 V
5 V ± 5%
–0.3 to 7 V
0 to 5 sec
+12 V
12 V + 10% –8%
–0.3 to 15 V
0 to 5 sec
Table 48: Power supply current of PATA model
Power supply current of PATA
model
+5 Volts [mA]
+12 Volts [mA]
Total
[W]
(values in milliamps. RMS)
Pop Mean
Std Dev
Pop Mean
Std Dev
Idle average
350
12
600
12
9.0
Idle ripple (peak-to-peak)
230
40
600
20
Low RPM idle
200
7
280
10
4.4
Low RPM idle ripple
220
30
380
20
Unload idle average
200
7
480
13
6.8
Unload idle ripple
220
35
600
20
Random R/W average
1
560
9
850
20
13.0
Random R/W peak
1420
50
2100
50
Silent R/W average
610
9
660
15
11.0
Silent R/W peak
1420
50
1350
40
Start up (max)
1100
50
2000
75
Standby average
150
9
20
3
1.0
Sleep average
100
8
20
3
0.7
Summary of Contents for Deskstar 7K400
Page 2: ......
Page 18: ...Deskstar 7K400 Hard Disk Drive Specification 4 ...
Page 20: ...Deskstar 7K400 Hard Disk Drive Specification 6 ...
Page 21: ...Deskstar 7K400 Hard Disk Drive specification 7 Part 1 Functional specification ...
Page 22: ...Deskstar 7K400 Hard Disk Drive Specification 8 ...
Page 24: ...Deskstar 7K400 Hard Disk Drive Specification 10 ...
Page 34: ...Deskstar 7K400 Hard Disk Drive Specification 20 ...
Page 36: ...Deskstar 7K400 Hard Disk Drive Specification 22 ...
Page 58: ...Deskstar 7K400 Hard Disk Drive Specification 44 ...
Page 78: ...Deskstar 7K400 Hard Disk Drive Specification 64 ...
Page 80: ...Deskstar 7K400 Hard Disk Drive Specification 66 ...
Page 88: ...Deskstar 7K400 Hard Disk Drive Specification 74 ...
Page 116: ...Deskstar 7K400 Hard Disk Drive Specification 102 ...
Page 270: ...Deskstar 7K400 Hard Disk Drive Specification Write cache 94 Write DMA 226 ...