Seagate Medalist 1640 Product Manual page 18

10 Medalist 1640 and 2140 Product Manual, January 1996
Spinup Seeking
Current at +12V
Amps peak
RMS amps typ
Watts typ
Current at +5V
RMS amps typ
Watts typ
Power
Total watts typ
11.92W
1.8.1.1 Active mode
During the Active mode, the drive is involved in spinup, seeking or
read/write activities.
• Spinup. Spinup mode is entered from the Standby mode. The drive
brings the spindle and discs up to operating speed. Power in this mode
is measured from power-on to the time the drive is ready for normal
operation.
• Seeking. Seek mode is entered from Idle mode. The read/write heads
are moved to a specific location on the disc surface in preparation for
reading from or writing to the disc. Typical power is defined as the
power average of executing random seeks with a 2-revolution (22.2
msec) dwell between Seek commands.
• Read/write. Read/write power and current are measured with the
heads on track. The test cycle consists of writing 16 sectors followed
by a 22.2 msec delay and reading 16 sectors followed by a 22.2 msec
delay.
Read/
write
1.60 ---- ----
0.885 0.530 0.315
10.62 6.36 3.78
---- ---- ----
0.260 0.41 0.44
1.3 2.05 2.2
8.41W 5.98W
Idle Standby
---- ----
0.295 0.015
3.54 0.18
---- ----
0.235 0.115
1.18 0.575
4.72W 0.755W