8 U4 Family Product Manual, Rev. D
•Seek Mode
During seek mode, the read/write actuator arm moves toward a
specific position on the disc surface and does not execute a read or
write operation. Servo electronics are active. Seek mod e power rep-
resents the worst-case power consumption, using only random seeks
with read or write latency time. This mode is not typical and is provide d
for worst-case information.
•Read/Write power and current
Read/write power is measured with the heads on track, based on a
16-sector write followed by a 32-msec delay, then a 16-sector read
followed by a 32-msec delay.
•Operating power and current
Operating power is measured using 40 percent random seek s, 40
percent read/write mode (1 write for each 10 reads) and 20 percent
drive inactive.
•Idle mode power
Idle mode power is measured with the drive up to spee d, with s ervo
electronics active and with the heads in a random track locati on.
•Standby mode
During Standby mode, the drive accepts commands, but the driv e is
not spinning, and the servo and read/write electronic s are in p ower-
down mode.