Seagate HAWK 2 ST12400N Installation Manual page 31

Hawk 2 Family Installation Guide, Rev. C
J2 Jumper
Installation Jumper Function Description
TE
On With the jumper installed, the On-board (non-
removable) terminator circuits are enabled
(connected to the I/O lines). Default is jumper
installed only on "N" models and "NC" mod-
els having factory installed terminator mod-
ule U5.
Off Terminator circuits not connected to I/O
lines.
TP TP
Off Off No terminator power is connected to drive
terminators or SCSI bus I/O pin 26.
On Off Drive supplies its own terminator power
only. Jumper on this position is factory de-
fault only for "N" models and "NC" models
that have terminator module U5 (factory
installed only).
Off On Jumper in this position is default for "ND"
drives. Drive supplies power only to I/O pin
26 of SCSI bus. When drives have differen-
tial I/O circuits, a jumper on the right TP
position may be needed to power external
terminators (see system documentation).
The ND model drives have differential I/O
circuits which have no terminator circuits on
the drive.
On On Drive supplies terminator power to itself
(internal connection) and to I/O pin 26 of
SCSI bus. This is a legal jumper setting.
29