E-5
Appendix E: SAS-743TQ Backplane Specifications
#6. and #7. Sideband Headers
The sideband headers are designated JP51
and JP52. For SES-2 to work properly, you
must connect an 10-pin sideband cable.
See the table to the right for pin defini
-
tions.
Sideband Headers
Pin # Definition
Pin # Definition
2
Backplane
Addressing
(SB5)
1
Controller
ID (SB6)
4
Reset (SB4)
3
GND (SB2)
6
GND (SB3)
5
SDA (SB1)
8
Backplane
ID (SB7)
7
SCL (SB0)
10
No Connec-
tion
9
No Connec-
tion
#8. and #9. I
2
C Connectors
The I
2
C connectors, designated JP44 and
JP45, are used to monitor HDD activity and
status. See the table on the right for pin
definitions.
I
2
C Connector
Pin Definitions
Pin# Definition
1
Data
2
Ground
3
Clock
4
No Connection
#10. - #17. SAS Ports
The SAS ports are used to connect the
SAS drive cables. These eight ports are
designated #0 - #7. Each port is also
compatible with SATA drives, however, do
NOT mix SAS and SATA drives in the same
enclosure.
