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3-3
Failover with RAID Cards and Multiple HBAs
The SAS-936EL backplane may be configured 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 configured to perform
the load balancing and failover tasks.
Dual Host Bus Adapter
In a dual host bus configuration, the
backplane connects to two host bus
adapters.
Dual Host Bus Adapter Failover
If the expander or data path in Port
A fails, the system will automatically
fail over to Port B. This maintains a
full connection to all drives.
IMPORTANT: For RAID controllers, redundancy is achieved through port
failover. For multiple HBAs MPIO software is required to achieve failover
protection.
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Chapter 3: Dual Port and Cascading Configurations
SAS HBA
SAS HBA
Q3
EC5
ACT18
SEC_MODE2
C365
SEC_MODE1
3
EXPDBG2
U18
A
C
3
1
4
MH9
MH8
MDIO2
1
JP1
A
1
SEC_J2
1
SEC_J0
J18
4
UART_S1
4
1
J19
U4
C361
MH13
EC20
PWR3
PWR4
PWR2
+5V
GND
GND
+12V
+5V
GND
GND
+12V
+5V
GND
GND
+12V
+5V
GND
Port B
Expander 2
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
R
R R R R R R R R R R
SILKSCREEN
UNLESS OTHERWISE
PRIMARY-SIDE
SPECIFIED DIMENSIONS
ARE IN INCHES
DESIGNER:
Teddy Tsai/Amo
TOLERANCES
DESIGNED BY SUPERMICRO U.S.A.
www.supermicro.com
DECIMAL
ANGLE
DATE:
2010 03 20
REV:
1.01
X
.1
30
SAN JOSE,CA 95131
XX
.03
MACH FINISH
PROJECT NAME:
SAS2-936EL2
XXX
.010
TEL:408-503-8000 FAX:408-503-8008
SAS HBA
SAS HBA
ACT18
SEC_MODE2
Q3
EC5
SEC_MODE1
3
EXPDBG2
C365
U18
A
C
3
1
4
MH9
MH8
MDIO2
1
JP1
A
1
1
SEC_J2
SEC_J0
4
J18
UART_S1
4
1
J19
U4
MH13
EC20
PWR3
PWR4
PWR2
+5V
GND
GND
+12V
+5V
GND
GND
+12V
+5V
GND
GND
+12V
Port B
Expander 2
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
UPER
R
R R R R R R R R R R
SILKSCREEN
UNLESS OTHERWISE
PRIMARY-SIDE
SPECIFIED DIMENSIONS
ARE IN INCHES
DESIGNER:
Teddy Tsai/Amo
TOLERANCES
DESIGNED BY SUPERMICRO U.S.A.
DECIMAL
ANGLE
www.supermicro.com
DATE:
2010 03 20
REV:
1.01
X
.1
30
SAN JOSE,CA 95131
XX
.03
MACH FINISH
PROJECT NAME:
SAS2-936EL2
XXX
.010
TEL:408-503-8000 FAX:408-503-8008
3-3
C120
MDIO1
C133
C363
C128
C366
EC26
L1
L2
1
MH7
MH6
2
C362
J16
1
EC27
L59
EC4
SAS2-936EL2
U3
UART_P1
4
REV: 1.01
1
4
BCA84
SEC_J1
EXPDBG1
PRI_J2
PRI_J0
WWN
C367
C121
MH12
EC11
EC17
EC13
PWR1
MH11
EC8
C390
1
4
1
GND
+12V
EC16
FAN1
FAN2
EC14
Expander 1
C120
MDIO1
C133
C363
C128
C366
EC26
L1
L2
1
MH7
MH6
2
C362
J16
1
EC27
L59
EC4
U3
SAS2-936EL2
UART_P1
4
REV: 1.01
1
4
BCA84
EXPDBG1
SEC_J1
PRI_J2
PRI_J0
C367
WWN
C361
C121
MH12
EC11
EC13
EC17
PWR1
MH11
EC8
C390
1
4
+5V
GND
GND
+12V
EC16
FAN1
EC14
Expander 1
MH5
PRI_I2C1
U13
ACT17
C
A
FANFAIL_LED_DISABLE
PRI_J1
1
1
PRI_MODE1
A
C
A
C
1
A
A
1
C
C
3
PRI_MODE2
OVERHEATFAIL1
FANFAIL1
1
5V_LED1
12V_LED1
BAR CODE
EC10
EC9
MH10
4
1
4
FAN3
Port A
MH5
PRI_I2C1
U13
ACT17
C
A
FANFAIL_LED_DISABLE
PRI_J1
1
PRI_MODE1
A
C
A
C
1
1
1
A
C
A
C
3
PRI_MODE2
OVERHEATFAIL1
FANFAIL1
1
5V_LED1
12V_LED1
BAR CODE
EC10
EC9
MH10
1
4
1
4
FAN2
FAN3
Port A
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