2.2 SCSI Device Cables
For reliable Ultra320 operation, be sure to use an Ultra320-rated SCSI device cable. The internal Ultra320 SCSI device cable also has built-in low voltage differential (LVD) and single-ended termination. This built-in feature is included because most LVD SCSI hard disk drives are not made with on-board low voltage differential termination.
2.2.1 Internal SCSI Cables
You can connect all internal SCSI devices to the host adapter with an unshielded, twisted pair, 68-pin ribbon cable. Some 68-pin internal SCSI cables come with a low voltage differential and single-ended terminator on one end, which must be farthest from the host adapter. Figure 2.3 and Figure 2.4 show internal SCSI cables with and without a terminator.
Figure 2.3 SCSI Cable – 68-Pin High Density with Terminator
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Terminator
Figure 2.4 SCSI Cable – 68-Pin High Density without Terminator
2.2.2 External SCSI Cable
You must connect all external SCSI devices to the host adapter with shielded cables. Figures 2.5 to 2.7 are examples of external SCSI cables. Select the correct 68-pin cable for your devices.
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