Each Mode Setting; Table 5.3 Motor Start Mode Setting - Fujitsu MAW3073NC/NP Product/Maintenance Manual

5.3.2

Each mode setting

(1) Setting terminator power supply
Refer to Table 5.2 for controlling the supply of power from the drive to the SCSI terminator power
source (TERMPOW).
For information on NP model, refer to Figures 5.2 and 5.3.
Table 5.2
Supply on/off of SCSI terminator power
*1. Set at factory shipment.
For NC model, the function of the terminator power supply setting is not supported.
(2) Motor start mode
Set how to control the starting of the HDD spindle motor according to Table 5.3. This setting only
determines the operation mode when the power supply is turned on or the microcode is
downloaded. In both modes, stopping or restarting the spindle motor can be controlled by
specifying the START/STOP UNIT command.
Start timing of the spindle motor
Starting of the motor is controlled
with the START/STOP UNIT
command.
The motor is started immediately after
the power supply is turned on or after
the microcode is downloaded.
The motor is started after the elapse
of a delay time that is based on the
SCSI ID. The delay time is provided
immediately after the power supply is
turned on or after the microprogram is
downloaded.
*1. Set at factory shipment.
*2. For NP model, delay starting of spindle motor is supported by the CHANGE DEFINITION
command only.
*3. To set the setting terminals on NC models to short, apply voltage ranging between-0.3 V and 0.8
V to the setting terminals externally. To set the setting terminals on NC models to open, apply
voltage ranging between 2.0 V and 5.5 V to the setting terminals from an external source.
Refer to Subsection 3.1.10 "START/STOP UNIT (1B)" of the SCSI Logical Interface
Specifications for details of the START/STOP UNIT command.
5-8
Setting SCSI terminator power supply (NP model)
from the HDD
Supply off
Supply on
Table 5.3 Motor start mode setting
Pin 38 of CN1
(RMT START)
Short
Open
Open
Pin pair 23/24 of CN2
(TRMPOW/TRMPOW)
Open
Short (*1)
NC model (*3)
Pin 78 of CN1
(DYLD START)
Open or Short
Open
Short
NP model
Pin pair 11/12 of
CN2
(GND/RMSTART)
Open
Short (*1)
(*2)
C141-E226