Seagate ST136475LW/LC manual Multiple-drive connection to host adapter

Barracuda 36 Installation Guide, Rev. B 27

“LW” Model

Drive

SCSI ID X

(or last drive)

[4]

SCSI ID 1

SCSI ID 0

Note. Do not mix drives operating single-ended with drives operating differential on the daisy chain.

[3]

Additional

SCSI devices

Pin 1

(check your

adapter for Pin 1 location)

SCSI ID 7

[1]

Host

Adapter

PCBA

[3]

[2]

[1]Closed end type 68 pin connector used. Terminator required.

[2]Open end type (in-line application) connector used. No terminator.

[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 ANSI Standard X3T10/1142D (including host adapter/initiator). The cable length restriction limits the total number of devices allowed.

[5]SCSI ID7 has highest arbitration priority. For “LW” models, priority is ID7 to ID0, then ID15 to ID8 (ID 8 very lowest).

[6]Last drive on the daisy chain.

Figure 3b. Multiple-drive connection to host adapter