Western Digital WDE2170 User Manual
Page 19
WD Enterprise WDE2170/WDE4360
Specifications
4079-001045 Rev. B
RELEASED 04-08-97
11
2.4. Electrical
Specifications
2.4.1. Current Requirements and Power Dissipation
Table 2-7. WDE2170 Current Requirements and Power Dissipation
Operating
Mode
Current
Population Mean + 4 Sigma
Current
Population Mean
Power
Pop Mean + 4 Sigma
Power
Population Mean
12 VDC
5 VDC
SE/Diff.
4
12 VDC
5 VDC
SE/Diff.
4
SE/Diff.
4
SE/Diff.
4
Spin-up
peak DC
1.22A
635/780 mA
peak DC
1.15A
580/760 mA
___
___
Seek
50 ops/s
1
mean DC
390 mA
645/795 mA
mean DC
345 mA
585/770 mA
7.65/8.70 W
7.05/8.14 W
Idle
2
255 mA
625/785 mA
210 mA
570/760 mA
5.96/6.85 W
5.35/6.29 W
Read/Write
3
365 mA
645/795 mA
325 mA
585/770 mA
7.65/8.70 W
7.05/8.14 W
Notes: All values at 25
°
C, 5.0V, 12.0V input.
1
Example of doing 50 random ops/sec.
2
The idle condition is defined by the motor running at the full rated RPM with no seeking or read/write
operations being performed. The drive was track following on the OD cylinder for these
measurements.
3
This is for a ratio of four reads per one write.
4
Differential option available on 68-pin models only.
Table 2-8. WDE4360 Current Requirements and Power Dissipation
Operating
Mode
Current
Population Mean + 4 Sigma
Current
Population Mean
Power
Pop Mean + 4 Sigma
Power
Population Mean
12 VDC
5 VDC
SE/Diff.
4
12 VDC
5 VDC
SE/Diff.
4
SE/Diff.
4
SE/Diff.
4
Spin-up
peak DC
1.24A
625/790 mA
peak DC
1.16A
595/725 mA
___
___
Seek
50 ops/s
1
mean DC
520 mA
625/790 mA
mean C
480 mA
600/735 mA
9.22/9.95 W
8.71/9.38 W
Idle
2
390 mA
610/790 mA
350 mA
585/730 mA
7.60/8.40 W
7.06/7.80 W
Read/Write
3
500 mA
625/790 mA
460 mA
600/735 mA
9.22/9.95 W
8.71/9.38 W
Notes: All values at 25
°
C, 5.0V, 12.0V input.
1
Example of doing 50 random ops/sec.
2
The idle condition is defined by the motor running at the full rated RPM with no seeking or read/write
operations being performed. The drive was track following on the OD cylinder for these
measurements.
3
This is for a ratio of four reads per one write.
4
Differential option available on 68-pin models only.