Fujitsu MAA3182/MAB3045/MAB3091:Switch Settings

The user must set the following terminals and SCSI terminating resistor before installing the HDD in the system.

Setting terminal: CN6

Notes:

1. The user must not change the setting of terminal not described in this section. Do not change setting status set at factory shipment.

2. Do not change the setting of terminals except following setting pins during the power is turned on.

   - Write protect

   MAx3xxxSP: CN7 13-14

3. To short the setting terminal, use the short plug attached when the device is shipped from the factory.

Setting terminals (MAx3xxxSP)
Figure 2 Setting terminals (MAx3xxxSP)

1.1 SCSI ID setting

(1)SCA type 16-bit SCSI model (MAx3xxxSC)

There is no SCSI ID setting terminals for SCA type model. Set the SCSI ID using ID0,ID1,ID2, and ID3 signals on the SCSI interface connector(CN1).

(2)Single-ended 16-bit SCSI model (MAx3xxxSP)

Table 1 shows the SCSI ID setting. Refer to Figure 2 for connector positioning and allocation.

IMPORTANT

When the SCSI ID is set using the external operator panel connector CN1, all pins listed in Table 1 should be open.
If any of pins are shorted, unexpected SCSI is set.

Table 1 SCSI ID setting(Single-ended 16-bit SCSI model:MAx3xxxSP)

SCSI ID	MAx3xxxSP(CN7)
	7-8	5-6	3-4	1-2
0	OPEN	OPEN	OPEN	OPEN
1	OPEN	OPEN	OPEN	SHORT
2	OPEN	OPEN	SHORT	OPEN
3	OPEN	OPEN	SHORT	SHORT
4	OPEN	SHORT	OPEN	OPEN
5	OPEN	SHORT	OPEN	SHORT
6	OPEN	SHORT	SHORT	OPEN
7	OPEN	SHORT	SHORT	SHORT
8	SHORT	OPEN	SHORT	SHORT
9	SHORT	OPEN	OPEN	SHORT
10	SHORT	OPEN	SHORT	OPEN
11	SHORT	OPEN	SHORT	SHORT
12	SHORT	SHORT	OPEN	OPEN
13	SHORT	SHORT	OPEN	SHORT
14	SHORT	SHORT	SHORT	OPEN
15*	SHORT	SHORT	SHORT	SHORT

* Setting at factory shipment

IMPORTANT

1. Set the SCSI ID so that there are no duplicates 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

1.2 Each mode setting

(1)Setting terminal power supply

Refer to Table 2 for contorlling the supply of power from the drive to SCSI terminal resistance power source (TERMPOW). However, this setting may not be used with SCA2 type 16bit-SCSI(MAx3xxxSC). For information on MAx3xxxSP, refer to Figure 2.

Table 2 Setting SCSI terminal power supply

Supply on/off of SCSI terminating resistor power from HDD	CN6 1-2
Supply off	OPEN
Supply on	SHORT*

* Setting at factory shipment

(2)Motor start mode

Set how to control the starting of the HDD spindle motor according to Table 2. This setting only determines the operation mode when the power supply is turned on or microcode is downloaded. In both modes, stopping or restarting the spindle motor can be controlled by specifying the START/STOP UNIT command.

This setting is not provided for SCA2 type 16-bit SCSI model(MAx3xxxSC).

For information on MAx3xxxSP, refer to Figure 2.

Table 3 Motor start mode setting

Start timing of the spindle motor	CN6 3-4
Starting of the motor is controlled with START/STOP UNIT command.	OPEN
The motor is started immediately after the power supply is turned or the microcode is downloaded.	SHORT*

* Setting at factory shipment

1.3 Write protect,terminating resistor setting

(1)Write protect

When the write protect function is enabled, writing to the disk medium is disabled. The write protect function setting is not provided to the SCA type 16-bit SCSI model(MAx3xxxSC).

For information on MAx3xxxSP, refer to Figure 2.

Table 4 Write protect setting

Write protect	MAx3xxxSS	MAx3xxxSP
	CN7 11-12	CN7 13-14
Write operation is enabled.	OPEN*	OPEN*
Write operation is disabled.	SHORT	SHORT

* Setting at factory shippment

(2)Connection of terminating resistor on SCSI interface

a. SCA2 type 16-bit SCSI model(MAx3xxxSC)

Since there is no SCSI terminating resistor on the SCSI interface for SCA2 type 16-bit SCSI, there is no setting on the HDD.

b.Single-ended 16-bit SCSI model(MAx3xxxSP)

Setting terminals CN6 5-6 set whether to use the terminating resistor circuit on the SCSI interface provided for the HDD (see Table 5).

IMPORTANT

When the external operator panel is connected using the external operator panel connector CN1, this setting is effective only when the A9 pin (DISCON) is open.

Table 5 Setting of connection of terminating resistor on SCSI interface
(single-ended 16-bit SCSI model:MAx3xxxSP)

Connecting SCSI interface terminating resistor	MAx3xxxSP
	CN6 5-6
Terminating resistor circuit is not connected.	OPEN
Terminating resistor circuit is connected.	SHORT*

* Setting at factory shipment

1.4 Mode settings

Table 6 Default mode settings(by CHANGE DEFINITION) command

Mode setting	Contents
SCSI level	SCSI-2
SYNCHRONOUS DATA TRANSFER REQUEST message sending	Sent from HDD
UNIT ATTENTION report mode	Reported
Reselection retry count	Not restricted
WIDE DATA TRANSFER REQUEST message sending	Sent from HDD
Reselection time-out delay	250 ms
Spindle motor start delay time	0 sec

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