Motor Start Mode Setting; Write Protect Setting (Cn2) - Fujitsu MAH3091MC - Enterprise 9.1 GB Hard Drive Product/Maintenance Manual

(2) Motor start mode
Set how to control the starting of the IDD 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 the microcode is downloaded.
*1 Setting at factory shipment
Refer to Chapter 3 of the SCSI Logical Interface Specifications for details of the START/STOP
UNIT command.
(3) Write protect
When the write protect function is enabled, writing to the disk medium is disabled.
Write operation is enabled.
Write operation is disable.
*1 Setting at factory shipment
(4) Setting of the SCSI interface operation mode
By establishing a short-circuit between the 15 and 16 CN2 setting terminals, the SCSI interface
operation mode is forcibly set to the single-ended mode. When this setup terminal is open, the IDD
automatically identifies the DIFFSNS signal level on the SCSI bus and the IDD SCSI interface
operation mode is set to the operation mode.
5 - 8
Table 5.3

Motor start mode setting

Table 5.4

Write protect setting (CN2)

Write protect
C141-E103-02EN
CN2 11-12 CN2 11-12
(MP) (MC)
Open Short
Short (*1) Open (*1)
CN2 9-10
Open (*1)
Short