Barracuda 18LP Family: ST39175LW/LC ST318275LW ... - Seagate
Barracuda 18LP Family: ST39175LW/LC ST318275LW ... - Seagate
Barracuda 18LP Family: ST39175LW/LC ST318275LW ... - Seagate
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<strong>Barracuda</strong> <strong>18LP</strong> Product Manual, Rev. E 57<br />
Recommended mating 80-position PCBA mount connectors:<br />
Straight-in connector<br />
<strong>Seagate</strong> P/N: 77678703<br />
Amp US P/N: 2-557103-1<br />
or 94-0680-02-1<br />
Amp US P/N: 2-557103-2<br />
or 94-0680-02-2<br />
Amp Japan P/N: 5-175475-9<br />
Hot plug version (with ground guide-pin)<br />
787311-1 with polarization<br />
787311-2 without polarization<br />
Right-angle to PCBA connectors<br />
<strong>Seagate</strong> P/N: 77678559 Amp US P/N: 2-557101-1 Amp Japan P/N: 5-175474-9<br />
For additional information call Amp. FAX service at 1-800-522-6752.<br />
“LW” Model<br />
Drive<br />
Note. Do not mix drives operating<br />
single-ended with drives<br />
operating differential on the<br />
daisy chain.<br />
[6]<br />
Terminator<br />
[1]<br />
2 through X<br />
SCSI devices [4]<br />
SCSI ID 1<br />
Pin 1<br />
(check your<br />
adapter for Pin 1 location)<br />
[2]<br />
SCSI ID 7 [5]<br />
SCSI ID 0<br />
[1]<br />
Host Adapter<br />
PCBA<br />
[2]<br />
[3]<br />
[1] Closed end type 68 pin connector used. Terminator required.<br />
[2] Open end type (in-line application) connector used. No terminator.<br />
[3] Host need not be on the end of the daisy-chain. Another device can be on the end with the terminator, the<br />
host having no terminator.<br />
[4] Total interface cable length must not exceed that specified in ANSI Standard T10/1302D (including host<br />
adapter/initiator). The cable length restriction limits the total number of devices allowed.<br />
[5] SCSI ID7 has highest arbitration priority. For “LW” models, priority is ID7 to ID0, then ID15 to ID8 (ID 8<br />
very lowest).<br />
[6] Last drive on the daisy chain.<br />
Figure 10.<br />
SCSI daisy chain interface cabling for “LW” model drives