40Barracuda 2LP Installation Guide, Rev. E
W/WD drives
Terminator power
There are four possible terminator power configurations for ST31250W and ST32550W drives (see Figure 12). You will not normally need to change this option and can leave the drive configured as it was shipped from the factory.
ST31250WD and ST32550WD drives should be config- ured with a jumper connecting J1 pins 1 and 3 (and no jumper on J1 pins 2 and 4) as illustrated in Figure 12.
ST31250W and ST32550W |
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Pin 6 | J1 Connector | ST31250WD and | ||
Pin 1 | ||||
| ST32550WD |
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| Pin 2 |
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| J1 Connector |
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| Pin 1 | Pin 4 |
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| Pin 3 |
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| J1 | Pin 1 | |
ST31250W and ST32550W | Pin 6 | Pin 2 | ||
Term. power from drive (default) |
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Term. power to SCSI bus |
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Term. power from SCSI bus |
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Term. power to SCSI bus |
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and drive |
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| J1 |
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| Pin 2 | Pin 4 | |
ST31250WD and ST32550WD Pin 1 | Pin 3 | |||
