HP CD-Writer Plus Internal 9200i Drive - Manual (Page 8)

8 How to Set the Termination
Find the SCSI ID you will use on the graphic below and notice which
pairs of pins are to have jumpers and which will not.
Depiction of SCSI IDs: IDs are defined by the placement of jumpers on the ID1, ID2, and ID4
pins on back of the drive.
Pull off or place jumpers on the ID1, ID2, and ID4 pins on the back of the
drive so that they match the graphic for the ID you will use. If you have
an extra jumper you may store it on the set of pins labeled SPARE.
How to Set the Termination
What does termination mean?
Think of a pipe full of water. The pipe needs to have caps at both ends to
prevent the water from spilling out. The termination on a SCSI device is
analogous to the cap on the pipe. For a chain of SCSI devices to work
properly the devices at the ends of a SCSI chain need to be terminated.
Devices that are not at the ends of the chain must not be terminated.
ID1
ID2
ID4
SCSI ID
0
1
2
3
4
5
6
7
SCSI ID
ID1
ID2
ID4
Usually reserved for a hard drive
Usually reserved for a hard drive
Usually reserved for the SCSI card itself