Supercmicro SC826 series, Руководство пользователя

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B-4
SC826 JBOD Chassis Manaual
4-5. Primary and Secondary SAS Connectors
The primary SAS connectors are designated PRI-J1 through PRI-J4. The
secondary SAS Ports are designated SEC-J1 through SEC-J4 and are not
present on EL1 single port backplanes.
6-7. Primary and Secondary UART Connectors
UART connectors are used for manufacturer's diagnostic purposes only. The
primary UART connector is designated PRI-UART and J22. The secondary
UART connector is designated SEC-UART and J23, and is not present on
BPN-SAS3-826EL1.
8-9. SDB Connectors
These are debug connectors used for the manufacturer's diagnostic purposes
only. The Primary SDB connector is designated PRI-SDB and J18. The
secondary SDB connector is designated SEC-SDB and J19, and is not present
on BPN-SAS3-826EL1.
10-11. I
2
C Connectors
In a JBOD configuration, this connector is cabled to the JBOD control board,
CSE-PTJBOD-CB3, to transmit management data between the the backplane
and the control board. The primary I
2
C connector. is designated I2C#0 (J20).
The secondary I
2
C connector is designated I2C#4 (J21), and is not present on
BPN-SAS3-826EL1.
B-5 Rear Connector and Pin Definitions
1-2. Primary and Secondary Expander Chips
The primary and secondary expander chips allow the backplane to support dual
port, cascading, and failover configurations.
Backplane
Main Power
4-Pin Connector
Pin# Definition
1 +12V
2 and 3 Ground
4 +5V
3. Backplane Main Power Connectors
The 4-pin connectors, designated JPW1,
JPW2, and JPW3, provide power to the
backplane. See the table on the right for
pin definitions.