Dell 3 User Manual
Page 140
138
PERC 3/QC Hardware Installation
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J2, J3, J5, and J7 Termination Enable
J2, J3, J5, and J7 are 3-pin connectors that set the SCSI termination for each
SCSI channel. The Dell default is termination always enabled (OPEN.)
Table 10-2 displays the pinout.
J9, J10, J11, and J12 TERMPWR Enable
J9, J10, J11, and J12 are 2-pin connectors that enable TERMPWR to the
SCSI bus for each SCSI channel. The default is pins 1 and 2 shorted. Table
10-3 displays the pinout.
Ta b l e 1 0 - 2 . J 2 , J 3 , J 5 a n d J 7 Te r m i n a t i o n E n a b l e P i n o u t
Jumper
SCSI
Channel
SCSI
Termination
Controlled by
Software
SCSI
Termination
Always
Disabled
SCSI
Termination
Always Enabled
J2
0
Short pins 1-2
Short pins 2-3
OPEN (default)
J3
1
Short pins 1-2
Short pins 2-3
OPEN (default)
J5
2
Short pins 1-2
Short pins 2-3
OPEN (default)
J7
3
Short pins 1-2
Short pins 2-3
OPEN (default)
Ta b l e 1 0 - 3 . J 9 , J 1 0 , J 1 1 a n d J 1 2 T E R M P W R E n a b l e P i n o u t
Jumper
Term.
Power
Channel
Settings
J9
0
Short pins 1-2 to have the host PCI bus provide
TermPWR. This is the factory setting. Leave open to let
the SCSI bus provide TermPWR.
J10
1
Short pins 1-2 to have the host PCI bus provide
TermPWR. This is the factory setting. Leave open to let
the SCSI bus provide TermPWR.
J11
2
Short pins 1-2 to have the host PCI bus provide
TermPWR. This is the factory setting. Leave open to let
the SCSI bus provide TermPWR.
J12
3
Short pins 1-2 to have the host PCI bus provide
TermPWR. This is the factory setting. Leave open to let
the SCSI bus provide TermPWR.