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Failover with RAID Cards and Multiple HBAs
The BPN-SAS3-216EL backplane may be configured for failover with multiple HBAs
using either RAID controllers or HBAs to achieve 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 HBAs.
Dual Host Bus Adapter
Failover
If the expander or data path in Port
A fails, the system automatically
switches 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.
Appendix B BPN-SAS3-216EL Backplane Specifications
JP3
1
9
F1
1
J5
4
4
U15
JP3
1
2
8
9
F1
1
1
J5
4
4
2
11
12
B-11
SAS HBA
SAS HBA
U2
P7
U15
P8
C1
O7
C2
O8
BPN-SAS3-216EL
REV:1.00
B1
N7
U4
WWN ADDRESS
N8
B2
C11
M7
C12
M8
H
H
E
E
A
A
CG5
1
1
CG2
CG3
CG4
A1
5
5
U1
A2
CG1
30
U3
J9A
J9B
J9C
J9D
DESIGNED IN USA
J
J
J
J9
J
BAR CODE
25
C108
C162
20
C191
2
U8
15
R40
9
9
9
9
L7
8
10
CT199
5
11
1
1
A
E
K
R
Y
AE
R15
CS26
AK
C176
R17
R185
R186
C121
D
A
B
C
12
22
10
FAN1
4
C111
1
C132 C133
1
L5
U27
C98
CB31
2
24
C96
C128
22
R184
14
U9
11
13
11
12
12
C177
CB71
C135
C76
C103
C102
C122
CB81
L8
F2
CB120
Port B
Expander 2
Figure B-8. Dual HBA
SAS HBA
SAS HBA
U2
P7
P8
C1
O7
C2
O8
BPN-SAS3-216EL
REV:1.00
B1
N7
U4
WWN ADDRESS
B2
N8
C11
M7
C12
M8
H
H
E
E
A
A
CG5
CG2
CG3
CG4
1
1
A1
A2
5
5
U1
CG1
30
U3
J9A
J9B
J9C
J9D
DESIGNED IN USA
J9
BAR CODE
J
J
J
J
25
C108
C162
20
C191
U8
15
R40
9
L7
9
9
9
10
F1
CT199
5
11
1
J5
AE
A
E
K
C176
R
Y
R15
CS26
AK
R17
R185
R186
C121
D
12
22
10
FAN1
A
B
C
4
C132 C133
C111
1
1
L5
U27
C98
CB31
24
C96
22
C128
R184
U9
13
14
11
12
CB71
C76
C177
C103
C102
C122
CB81
C135
L8
F2
CB120
Port B
Expander 2
Figure B-9. Dual HBA Failover
P7
U15
U2
P8
C1
O7
C2
O8
BPN-SAS3-216EL
REV:1.00
B1
N7
U4
WWN ADDRESS
B2
N8
C11
M7
C12
H
H
E
E
A
A
M8
CG5
1
1
CG2
CG3
CG4
A1
A2
J
5
5
U1
J
CG1
J
J
30
U3
J9A
J9B
J9C
J9D
DESIGNED IN USA
J9
BAR CODE
25
C108
JP3
C162
20
9
C191
1
9
9
9
2
U8
15
R40
L7
8
10
9
CT199
5
F1
D
11
A
B
C
1
1
1
J5
A
E
K
R
Y
AE
R15
CS26
AK
C176
R17
R185
R186
C121
10
12
22
FAN1
4
C132 C133
C111
1
1
L5
U27
C98
CB31
4
4
24
C96
2
C128
22
R184
U9
14
11
12
13
11
12
CB71
C76
C177
C103
C102
C122
CB81
C135
L8
F2
CB120
Port A
Expander 1
P7
U15
U2
P8
C1
O7
C2
O8
BPN-SAS3-216EL
REV:1.00
B1
N7
U4
WWN ADDRESS
B2
N8
C11
M7
C12
M8
H
H
E
E
A
A
CG5
CG2
CG3
CG4
1
1
J
J
A1
J
J
A2
5
5
U1
CG1
30
U3
J9A
J9B
J9C
J9D
DESIGNED IN USA
J9
BAR CODE
25
9
9
9
9
C108
JP3
C162
20
C191
1
2
U8
15
R40
L7
8
10
9
D
A
B
C
CT199
5
11
1
1
1
AE
A
E
K
C176
R
Y
R15
CS26
AK
R17
R185
R186
C121
12
22
10
FAN1
4
C132 C133
C111
1
1
L5
U27
C98
4
CB31
4
24
C96
22
2
C128
R184
U9
14
13
11
12
11
12
CB71
C76
C177
C103
C102
C122
CB81
C135
L8
F2
CB120
Port A
Expander 1
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