IBM SCSI Settings

This is the label located on the bottom of the drive.	These are the jumpers on the bottom of the drive. Position 12 is on the left and 1 is on the right.
	12 - LED 11 - Disable SCSI Parity Check 10 - Delay Start 6/12 09 - Enable Auto Start Delay 08 - Enable TI-SDTR/WDTR 07 - Disable Unit Attention 06 - Enable Termination 05 - Disable Auto Spin Up 04 - DAS0 03 - DAS1 02 - DAS2 01 - DAS3

Option Jumper Block

SCSI Device ID (Positions 1-4)

Using the diagram below, choose the appropriate positions for the SCSI ID to be used. Throughout this diagram, the term "ON" means a jumper should be installed, while "OFF" means that no jumper should be installed. Additional features used by covering the appropriate postion are listed below the diagram.

Note: When shipped, the 80-pin model is shipped with SCSI ID 0 and the 68-pin model is shipped with SCSI ID 6.

Enable Auto Spin-up (Position 5)

This input defines the drive auto spin up option. If the shunt jumper is installed, the drive will spin up automatically after power on reset. If the shunt jumper is not installed, the drive will not spin up unless the host system issues the START COMMAND to the drive.

SCSI Terminator ON (Position 6) - 68-pin model ONLY

Note: This potion is ONLY effect for the 68-pin model. The drive may not spin while SCSI Bus is disconnected and internal terminator is disabled.

When this pin is connected to signal ground or jumper on, the internal terminator works.

Disable Unit Attention (Position 7)

Grounding this pin (jumper on) enables control of the UAI (Unit Attention Inhibit) bit in Mode Page 0.

Enable TI-SDTR/WDTR (Position 8)

Ground this pin (jumper on) enables the following:
Target Initiated Wide Data Transfer Request Negotiation
Target Initiated Synchronous Data Transfer Request Negotiation

Auto Start Delay & Delay Start 6/12 (Position 9 & 10)

The Auto Start Delay and Delay start 6/12 pins control when and how the drive can spin up, with the combination of Disable Auto Spin Up (Position 5). When both Auto Spin Up and Auto Start Delay are enabled, the drive start will be delayed by a period of time multiplied by its own SCRIM address. If Auto Spin up is disabled, these jumpers will be ignored. The table below gives more detailed information on how the various jumper configurations would work.

Disable SCRIM Parity Check (Position 11)

Grounding this pin (jumper on) will disable SCRIM Parity Checking.

LED pins (Position 12)

The LED pins are used to drive an external Light Emitting Diode (LED). up to 30 mA of sink current capability is provided. The LED Anode must be tied to the current limited +5 V source provided on Pin #1 of the Option Jumper Block. The LED Cathode is then connected to the Pin #2 to complete the circuit.

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