Seagate ST34573N/W/WD/LW/WC/LC, ST39173N/W/WD/LW/WC/LC Multiple-drive connection to host adapter

Barracuda 9LP Installation Guide, Rev. E 29

“W” Model

Drive

SCSI ID X

(or last drive)

[2]

SCSI ID 1

SCSI ID 0

“LW” or

“WD” Model

Drive [1]

[3]

Additional

SCSI devices

Pin 1

(check your

adapter for Pin 1 location)

SCSI ID 7

Host

Adapter

PCB

[1]Do not mix “W,” “WD,” and “LW” model drives on the daisy chain. However, an “LW” drive may operate on a “W” bus if the drive oper- ates only in the single-ended I/O transmission mode. Install the “LVD” jumper shown in Figure 16 to force single-ended I/O opera- tion. The external terminator [3] will be required on the “LW” drive if it is the last drive or only drive on the I/O daisy chain.

[2]“X” means up to 15 or the maximum allowable number of devices on the SCSI bus. See Table 4a and system documentation.

[3]External terminator.

Figure 3d. Multiple-drive connection to host adapter