Seagate ST19171WC Product Manual - Page 69
SCSI ID7 has highest arbitration priority, ID 0 has lowest for N models. For W models, priority
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Barracuda 9 Product Manual, Rev. C 59 "N" Model Drive "W" Model Drive "WD" Model Drive [6] [6] [7] [1] 2 through X SCSI devices [4] [6] Note: Do not mix "W" and "WD" model drives on the daisy chain. [7] Terminator SCSI ID 1 Pin 1 (check your adapter for Pin 1 location) [2] SCSI ID 7 [5] [1] SCSI ID 0 Host Adapter PCB [3] [2] [1] Closed-end type 50-pin connector used. Install terminator enable (TE) jumper plug. [2] Open-end type (in-line application) connector used. Terminators disabled. [3] Host need not be on the end of the daisy chain. Another device can be on the end with the terminator, the host having no terminator. [4] Total interface cable length must not exceed that specified in Section 9.6.3.1 (including host adapter/initia- tor). The number of devices allowed depends on data transfer rate. See Table 12. [5] SCSI ID7 has highest arbitration priority, ID 0 has lowest for "N" models. For "W" models, priority is ID 7 to ID 0, then ID 15 to ID 8 (ID 8 very lowest). [6] Last drive on daisy chain. [7] Open-end type 68-pin connector used. Terminators disabled on "WD" models. If end "WD" device, exter- nal terminator and closed-end type 68-pin connector used. On "W" models, install terminator enable (TE) jumper plug. "N" and "W" models do not require external terminators. Figure 16. SCSI daisy-chain interface cabling
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