Fujitsu M2903/M2909/M2915:Switch Settings


Setting Terminals
The user must set the following terminals and SCSI terminating resistor before installing the HDD in the system.
  Setting terminal:CN4, CN6, CN7, CN10
Figure 1 shows the setting terminal and the position of the SCSI terminating resistor modules.

Notes:
  1. The user must not change the setting of terminals not described in this secction. Do not change setting statuses set at factory shipment.
  2. Do not change the setting of terminals except pin 5-6 of CN6(offline self-diagnostics)/pin 5-6 of CN7(write protect).
  3. To short the setting terminals, use the short plug attached when the device is shipped from the factory.





Figure 1 Setting terminal position





Setting terminals(CN4)
Figure 2 shows the setting terminals.

Figure 2 Setting terminals(CN4)
Note:
"Short" and "Open" in the explanation of this section have following meaning.
Short:The short plug is mounted between specified pins.
Open:The open plug is removed from between specified pins.




(1)SCSI ID
Table 1 and 2 list the HDD SCSI ID setting.


Table 1 8-bit SCSI SCSI ID setting(CN4)


SCSI ID5-63-41-2
0OPENOPENOPEN
1OPENOPENSHORT
2OPENSHORTOPEN
3OPENSHORTSHORT
4SHORTOPENOPEN
5SHORTOPENSHORT
6SHORTSHORTOPEN
7*SHORTSHORTSHORT
* Set at factory shipment


Table 2 16-bit SCSI SCSI ID setting(CN4)


SCSI ID7-85-63-41-2 SCSI ID7-85-63-41-2
0OPENOPENOPENOPEN 8SHORTOPENOPENOPEN
1OPENOPENOPENSHORT 9SHORTOPENOPENSHORT
2OPENOPENSHORTOPEN 10SHORTOPENSHORTOPEN
3OPENOPENSHORTSHORT 11SHORTOPENSHORTSHORT
4OPENSHORTOPENOPEN 12SHORTSHORTOPENOPEN
5OPENSHORTOPENSHORT 13SHORTSHORTOPENSHORT
6OPENSHORTSHORTOPEN 14SHORTSHORTSHORTOPEN
7OPENSHORTSHORTSHORT 15*SHORTSHORTSHORTSHORT
* Setting at factory shipment


Notes:
  1. Set the SCSI ID so that there are no duplications between SCSI devices on the same SCSI bus.
  2. The priority of SCSI bus use in ARBITRATION phase is determined by SCSI ID as follows:
    7>6>5>4>3>2>1>0>15>14>13>12>11>10>9>8



Setting terminals(CN6)
Figure 3 shows the type of setting terminals.
 Figure 3 Setting terminals(CN6)

Notes
With respect to the setting terminals "short" and "open" mean the following:
Short:Jumper plug is set between specified pins
Open: Jumper plug is removed from specified pins


(1)Motor start mode
Set how to control the starting of the HDD spindle motor according to the Table 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.


Table 3 Motor start mode setting(CN6 1-2)
Start timing of the spindle motor1-2
Starting of the motor is controlled with the START/STOP UNIT commandOPEN
The motor is started immediately after the power supply is turned on or the microcode is downloadedSHORT*
* Setting at factory shipment




(2)SCSI bus parity


Set whether the SCSI data bus parity bit check is performed according to Table 4.


Table 4 SCSI bus parity setting(CN6 3-4)
SCSI data bus parity check by HDD3-4
Not performedOPEN
PerformedSHORT*
* Setting at factory shipment


(3)Offline self-diagnostics


Setting terminals CN5-6 are used to set starting/stopping the HDD offline self-diagnostics.(See Table 5). The offline self-diagnostics can test the normality of the HDD controller function and the basic read/write operation of the disk drive.
In normal opearation, the setting terminals must be open.


Table 5 Offline self-diagnostics setting(CN6 5-6)
Offline self-diagnostics 5-6
Stopped(normal operation mode)OPEN*
Executed(diagnostics mode)SHORT
* Setting at factory shipment





Setting terminals(CN7)
Figure 4 shows the types of seting terminals.

+ Single-Ended type, 8-bit SCSI + Differential type, 8-bit SCSI + Single-Ended type,16-bit SCSI + Differential type,16-bit SCSI

Figure 4 Setting terminals(CN7)


Notes
With respect to the setting terminal,"short" and "open" mean the following:
Short:Jumper plug is set between specified pins
Open: Jumper plug is removed from specified pins


(1)Write protect
Set setting terminals CN7 5-6 to enable or disable the write protect function provided for the HDD(See Table 6). When the write protect function is enabled, writing to the disk medium is disabled.


Table 6 Write protect setting(CN7 5-6)
Write protect5-6
Write operation is enabledOPEN*
Write operation is disabledSHORT
* Setting at factory shippment

(2)Connection of the terninating resistor on SCSI interface(Single-Ended type, 8-bit SCSI)


Setting terminal CN7 7-8 set whether to use the terminating resistor circuit on the SCSI interface provided for the HDD. (See Table 7) The setting terminals enable the terminating resistor circuit to be connected on the SCSI interface. Only the HDD of the single-ended type is provided with the terminating resistor circuit. This setting is for single-ended type 8-bit SCSI.


Table 7 Setting the connection of terminating resistor on SCSI interface(CN7 7-8)
Connection of the terminating resistor on the SCSI interface7-8
Terminating resistor circuit is not connectedOPEN
Terminating resistor circuit is connectedSHORT*
* Setting at factory shipment


(3)16-bit SCSI mode setting(Differential type, 16-bit SCSI)


Set setting terminal CN7 7-8 to enable or disable the 16-bit SCSI mode(See Table 8). When the 16-bit SCSI mode is enabled, all data bus (DB00 to DB15, DBP0 toDBP1) can be effective.
When the Differential type 16-bit SCSI HDD is used as 8-bit SCSI device, this setting must be open.


Table 8 16-bit SCSI mode setting(CN7 7-8)
SCSI mode7-8
8-bit SCSI mode settingOPEN
16-bit SCSI mode settingSHORT*
* Setting at factory shipment






Setting terminals(CN10)
Figure 6 shows the types of the setting terminals


Figure 6 Setting terminals(CN10)(for single-ended type 16-bit SCSI)


Note
With respect to the setting terminal,"short" and "open" mean the following:
Short:Jumper plug is set between specified pins
Open: Jumper plug is removed from specified pins



Setting terminals CN10 1-2 and 3-4 set whether to use the terminating resistor circuit on the SCSI interface provided for the HDD(See Table 9). The setting terminals enable the terminating resistor circuit to be connected on the SCSI interface. This setting is for single-ended type 16-bit SCSI.


Caution
This setting is effective when the external operator panel(S6) is connected and pin A9 (TERM-ON) is open.


Table 9 Setting connection of the terminating resistor on the SCSI interface
(CN10 1-2 and 3-4)
Connection of the terminating resistor on the SCSI interface3-41-2
Terminating resistor circuit is not connectedOPENOPEN
Terminating resistor circuit is connectedSHORT*SHORT*
* Setting at factory shipment



Table 10 shows the setting of connection of the terminating resistor when the 16-bit SCSI model is used as 8-bit SCSI model.


Table 10 Setting connection of terminating resistor on SCSI interface

(CN10 1-2 and 3-4)
(Single-ended type 16-bit SCSI is used as 8-bit SCSI)
Connection of the terminating resistor on the SCSI interface3-41-2
Terminating resistor circuit is not connectedSHORTOPEN
Terminating resistor circuit is connectedSHORT*SHORT*
* Setting at factory shipment


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