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Hard Disk Drive - Wide SCSI 2.1GB |
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Models Covered |
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DORS 32160 |
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Figure 1. Electrical Connectors (Rear View) |
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Figure 2. Jumper Pin Assignments (Bottom View from Front) |
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Table 1: SCSI ID (Address) Pins |
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Figure 3. Auxiliary Connector Description |
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Jumper Description |
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Disable Auto Spin Up (JP5)
This jumper controls how the drive starts when power is applied. If the jumper is NOT installed then the drive will spin up automatically after power-on reset. If the jumper IS installed the drive will NOT spin up unless the host system issues a ‘START UNIT'command to the drive. |
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SCSI Terminator Enable (JP6)
When this jumper is installed, the on-device SCSI bus terminator is enabled. |
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Unit Attention Disable (JP7)
When this jumper is installed the drive will not generate a Unit Attention following a Power On Reset (POR) or SCSI Bus Reset. Any pending Unit Attention conditions will also be cleared at POR or SCSI Bus Reset. |
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Auto Start Delay and Delay Start (JP9, JP10)
The Auto Start Delay and Delay Start pins control when and how the drive can spin up, with the combination of Auto Spin Up option (JP5). When in Auto Spin Up and Start Delay mode the drive start will be delayed by a period of time multiplied by its own SCSI address. If Auto Spin Up is disabled, these jumpers will be ignored. |
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Table 2: Auto Start Delay & Delay Start |
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Disable SCSI Parity (JP11)
When this jumper is installed, the drive's SCSI parity checking is disabled |
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External Activity (LED) Pins (JP12)
The LED pins can be used to drive an external Light Emitting Diode. Up to 8mA of sink current capability is provided. The LED Anode must be tied to the current limited +5V source provided on Pin #1 of the Jumper Pin Block. The LED Cathode is then connected to Pin #2 to complete the circuit. |
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Default Setting
The default jumper setting at shipment is ID0 with all jumpers removed. |
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SCSI Bus Termination
Termination is optionally provided for systems that desire to use it. In order to use this termination, the user needs to install a jumper between pins 13 and 14 of the Jumper Block. The jumper should only be installed on one device, which should be the last device on the SCSI bus (i.e. the device that is physically closest to the end of the cable). |
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ATTENTION
Your drive installation kit contains parts that allow it to be used with a variety of Acer Altos systems. Not all parts will be used on all systems. For details about installing drives, refer first to your system's User's Guide. |
