34Barracuda 2LP Installation Guide, Rev. E
N/ND drives
Terminating the drive
ST31250N and ST32550N drives are terminated with permanently mounted IC active terminators. If you install one of these drives and it is not on the end of the SCSI bus, disable the terminators by removing the jumper from pins 5 and 6 of connector J1 (see Figure 6). If you install the drive on the end of the SCSI bus, enable termination by installing a jumper on pins 5 and 6 of connector J1.
Note. Use active terminators when terminating the bus.
ST31250ND and ST32550ND drives do not have internal terminators or any other way of adding internal termina- tion to the drive. You must provide external active termi- nation (ANSI
| J1 |
Pin 6 | Pin 1 |
| |
| Pin 1 |
J1
Pin 6
J2
Pin 1
Pin 2
Enable SCSI 
terminator (default) 
Disable SCSI terminator
