Barracuda 9LP Installation Guide, Rev. E |
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| W/WD/LW drives | |
68 Pin SCSI I/O | +5V |
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| J5 |
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| Drive | |
Connector Pin 1 | Ground | Pin 1 | HDA | ||||||
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| Rear |
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| 4P | 3P2P | 1P |
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J1 |
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SCSI ID = 0 |
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| PCB |
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SCSI ID = 1 |
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SCSI ID = 2 |
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SCSI ID = 3 |
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SCSI ID = 4 |
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SCSI ID = 5 |
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SCSI ID = 6 |
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| For ID selection use |
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SCSI ID = 7 |
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| jumpers as shown or |
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SCSI ID = 8 |
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| connect a cable for |
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| remote switching as |
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SCSI ID = 9 |
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| shown below. |
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SCSI ID = 10 |
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SCSI ID = 11 |
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SCSI ID = 12 |
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SCSI ID = 13 |
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SCSI ID = 14 |
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SCSI ID = 15 |
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| Pins 1, 3, 5, and 7 are | |||
| not used | A3 A2 A1A0 |
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| optional connections to | |||||||
Host | Alternate |
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| switching circuits in host | ||
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| equipment to establish | ||||
Usage Plug |
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11 9 7 | 5 | 3 | 1 |
| drive ID. |
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| A0 A1 A2 A3 |
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| Remote Switches |
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+5V | +5V | 12 10 8 | 6 | 4 | 2 |
| Pins 2, 4, 6, and 8 are normally | ||
N.C. |
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| not grounded. They are driven low | |||
| Ground |
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| (ground) for 250 ms after a Reset or | ||
| Drive Activity LED |
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| PWR ON to allow drive to read | |||||
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| SCSI ID selected. Pin 8 may | ||||||
Dashed area is optional host circuitry (external to the | also be used to drive the cathode |
drive) connected to host supplied optional usage plug. | of an external Activity LED. |
