Start And Stop Time; Power-Up Sequence; Figure 1. Typical Startup Current Profile - Seagate MEDALIST 1080SL Product Manual

6 Medalist 1080sl SCSI Product Manual, August 1995

1.6 Start and stop time

If the motor start option is disabled, the drive becomes ready within
20 seconds after power is applied. If the motor start option is enabled,
the drive becomes ready within 20 seconds after it receives the Motor
Start command. If the drive receives a command to spin down or power
is removed, the drive stops within 15 seconds.
Amps
1.2
T2
1.0
0.8
0.6
0.4
0.2
T1
0
0 1 2

Figure 1. Typical startup current profile

1.6.1 Power-up sequence

The following typical power-up sequence is provided to assist in evalu-
ating drive performance. This information does not constitute a specifi-
cation or a performance guarantee.
1. Power is applied to the disc drive.
2. The LED comes on for about 1 second.
3. Depending on whether there is a jumper installed on pins 15 and 16
of the options jumper block (J8) shown in Figure 3 on page 17, either
of the following sequences occurs:
a. If a jumper is not installed, the remote start option is not enabled,
and the drive begins to spin up as soon as power is applied.
b. If a jumper is installed, the remote start option is enabled, and the
drive begins to spin up when the host commands the motor to start.
4. Within 250 msec after power is applied, the drive responds to the Test
Unit Ready, Request Sense, Mode Sense and Inquiry commands.
T3
T4 T5
3 4 5 6 7
Seconds
T6
T7
8 9