SCSI ID
Pins 1-2
Pins 3-4
Pins 5-6
Pins 7-8
8 OFF
OFF
OFF
ON
9 ON
OFF
OFF
ON
10 OFF ON OFF
ON
11 ON ON
OFF
ON
12 OFF
OFF ON ON
13 ON OFF ON ON
14 OFF ON ON ON
15 ON ON ON
ON
To select the required SCSI ID via the 68-pin auxiliary connector (only for the 68-pin connector
disk type):
1.
Verify that the SCSI ID DIP switches are set to SCSI ID 0.
2.
Position the SCSI ID jumpers of the auxiliary connector to SET, according to Table 37.
11.5.2.
Termination Pins
The SCSI bus must be terminated at the two physical ends of the cable. Only the devices
connected at either end may supply terminations. Devices that are not located at the ends of the
cable must have their terminations disabled, or they will cause a degradation of the signal
quality. Too many terminations will cause intermittent errors or other problems when accessing
devices on the SCSI bus. To select the termination condition, place a jumper between positions
9-10 of the header.
For the 68 pin connector, termination is also available via the auxiliary connector, as described in
Table 36 and Table 37.
Note: According to the SCSI standard, termination for the 80-pin SCA-2 connector must be
supplied from outside the disk drive. However, for convenience, termination has been set
as an option in the FFD 80-pin model.
11.5.3. Forced
Single-Ended
Electrical Interface Pins
When a jumper is placed between pins 11-12 of the header, the FFD forces a Single-Ended (SE)
electrical interface. When the jumper is removed, the FFD monitors the variation in the SCSI bus
signal for operation in either SE or Low Voltage Differential (LVD) mode.
11.5.4.
Write Protect Pins
When a jumper is placed between pins 13-14 of the header, the FFD is write protected.
11.5.5.
Secure Erase Pins
When a jumper is placed between pins 15-16 of the header, the FFD erases the media.
Note: In Secure Erase mode, the FFD erases the media even if a write protect jumper is present.
49
Product Specification and User Manual FFD 3.5" Ultra320 SCSI
43-PS-0305-00 Rev. 2.0
