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3-3
Safety Information and Technical Specifi cations
Primary ports
Expander 1
Primary ports
Expander 1
Secondary ports
Expander 2
Secondary ports
Expander 2
BPN-SAS2-847EL2
REV: 1.01
DESIGNED IN USA
L1
L2
+
+
+
+
C365
+
C353
+
C352
+
C134
+
C133
+
+
C121
+
+
+5V
+12V
GND
GND
PWR3
+5V
+12V
GND
GND
PWR1
+5V
+12V
GND
GND
PWR2
+5V
+12V
GND
GND
PWR4
+5V
+12V
GND
GND
PWR5
+5V
+12V
GND
GND
PWR6
+
EC20
+
EC27
+
+
EC29
+
+
EC16
EC8
+
EC9
+
+
EC7
+
EC4
+
EC15
+
+
EC13
+
EC17
+
EC14
+
+
+
EC12
+
+
EC21
+
EC22
C361
+
C362
+
EC6
+
C363
+
C130
C129
4
1
JP1
Q4
U24
U18
PRI_I2C1
EXPDBG2
1
1
4
UART_S1
1
4
EXPDBG1
1
4
UA
RT
_P1
1
3
PRI_MODE2
1
3
PRI_MODE1
3
1
SEC_MODE1
SEC_MODE2
3
1
U4
5
Y
E
20
R
K
10
15
AE
25
28
AH
U3
5
Y
E
20
R
K
10
15
AE
25
28
AH
FAN4
1
4
4
1
FAN1
FAN2
1
4
FAN3
1
4
FAN_MONITOR_DISABLE
1
BUZZER_ENB1
1
FANFAIL_LED_DISABLE
1
MDIO2
1
ACTLED1
1
MDIO1
C54
BC17
BC61
SEC_J1
PRI_J1
SEC_J0
PRI_J0
R28
R31
R42
EC3
+
EC2
+
EC5
EC32
+
EC33
+
D9
C
A
OVERHEATFAIL1
C
A
ACT22
FA
NF
AIL1
A
C
12V_LED1
A
C
5V_LED1
A
C
ACT21
A
C
2
1
J21
J24
8
BAR CODE
BAR C
ODE
WWN
WWN
J22
1
8
J23
BPN-SAS2-847EL2
REV: 1.01
DESIGNED IN USA
L1
L2
+
+
+
+
C365
+
C353
+
C352
+
C134
+
C133
+
+
C121
+
+
+5V
+12V
GND
GND
PWR3
+5V
+12V
GND
GND
PWR1
+5V
+12V
GND
GND
PWR2
+5V
+12V
GND
GND
PWR4
+5V
+12V
GND
GND
PWR5
+5V
+12V
GND
GND
PWR6
+
EC20
+
EC27
+
+
EC29
+
+
EC16
EC8
+
EC9
+
+
EC7
+
EC4
+
EC15
+
+
EC13
+
EC17
+
EC14
+
+
+
EC12
+
+
EC21
+
EC22
C361
+
C362
+
EC6
+
C363
+
C130
C129
4
1
JP1
Q4
U24
U18
PRI_I2C1
EXPDBG2
1
1
4
UART_S1
1
4
EXPDBG1
1
4
UA
RT_P1
1
3
PRI_MODE2
1
3
PRI_MODE1
3
1
SEC_MODE1
SEC_MODE2
3
1
U4
5
Y
E
20
R
K
10
15
AE
25
28
AH
U3
5
Y
E
20
R
K
10
15
AE
25
28
AH
FAN4
1
4
4
1
FAN1
FAN2
1
4
FAN3
1
4
FAN_MONITOR_DISABLE
1
BUZZER_ENB1
1
FANFAIL_LED_DISABLE
1
MDIO2
1
ACTLED1
1
MDIO1
C54
BC17
BC61
SEC_J1
PRI_J1
SEC_J0
PRI_J0
R28
R31
R42
EC3
+
EC2
+
EC5
EC32
+
EC33
+
D9
C
A
OVERHEATFAIL1
C
A
ACT22
FANF
AIL1
A
C
12V_LED1
A
C
5V_LED1
A
C
ACT21
A
C
2
1
J21
J24
8
BAR CODE
BAR C
ODE
WWN
WWN
J22
1
8
J23
SAS HBA
SAS HBA
SAS HBA
SAS HBA
Dual Host Bus Adapter
In a Dual Host Bus Confi guration, the
backplane connects to two Host Bus
Adapters.
Dual Host Bus Adapter
Failover
If the expander or data path in the
primary ports fails, the system auto-
matically switches to the secondary
ports. This maintains a full connection
to all drives. Note that this confi gura-
tion requires additional MPIO software.
Contact your Supermicro authorized
representative for details.
Figure 3-3: Dual HBA Failover Confi gurations
3-3 Failover with RAID Cards and Multiple HBAs
The SAS-836EL backplane may be confi gured for failover with multiple HBAs using
either RAID controllers or HBAs to acheive failover protection.
RAID Controllers:
If RAID controllers are used, then the failover is accomplished
through port failover on the same RAID card.
HBAs
: If multiple HBAs are used to achieve failover protection and load balancing,
Linux MPIO software must be installed and correctly confi gured to perform
the load balancing and failover tasks.
IMPORTANT: For RAID controllers, redundancy is achieved
through port failover. For multiple HBAs MPIO software is
required to achieve failover protection.
!