B-12
SC826 JBOD Chassis Manual
BPN-SAS3-826EL1
REV:1.00
SAS CODE
SAS CODE
A1
A2
A7
A8
CG1
B1
B2
B7
B8
C1
C2
C7
C8
D1
D2
D7
D8
CG4
E1
E2
G2
F2
F1
H2
H1
G1
F7
F8
G8
E7
G7
H7
H8
E8
PRESS FIT
CG5CG2
A1
A2
A7
A8
CG1
B1
B2
B7
B8
C1
C2
C7
C8
D1
D2
D7
D8
CG4
E1
E2
G2
F2
F1
H2
H1
G1
F7
F8
G8
E7
G7
H7
H8
E8
PRESS FIT
CG5CG2
A
C
A
C
A C
A
CA C
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
3 2 1
4
3 2 14
1 4
1
4
1
4
1 4
1
4
1
4
1
4
11
1222
A
1
E
5
H
5
1
A E H
A
1
E
5
H
5
1
A
E
H
A1
A2
A7
A8
CG1
CG2
B1
B2
B7
B8
C1
C2
C7
C8
D1
D2
D7
D8
CG3
E1
E2
G2
F2
F1
H2
H1
G1
F7
F8
G8
E7
G7
H7
H8
E8
PRESS FIT
A1
A2
A7
A8
CG1
CG2
B1
B2
B7
B8
C1
C2
C7
C8
D1
D2
D7
D8
CG3
E1
E2
G2
F2
F1
H2
H1
G1
F7
F8
G8
E7
G7
H7
H8
E8
PRESS FIT
1
5 10 15 20 25 26
Y
R
K
E
A
1 5 10 15 20 2526
AF
AE
Y
R
K
E
A
1
2
3
1
2
3
1
DESIGNED IN USA
BAR CODE
6
7
12
13
24
L22
J14
J15
LED29
LED28
LED27
LED26
LED25
L3
L23
C496
C502
C501
C500
C499
C498
C497
C495
C494 C492
C491
C689
C681
J21
J20
U22
J23
J22
J18
J19
JPW2
JPW1
JPW3
U34
U17
U14
U21
U16
U20
U6
C52
J16
J17
MH7
MH6
MH9
MH8
MH5
MH1
MH2
MH3
MH4
U30
U24
U7
U27
JP1
R97
C511
C5
J*
J*
I2C#4
SEC-UART
PRI-UART
12V 5V
HB-LED
HB-LED
PRI-SDB
PRI-J4 PRI-J3
PRI-J2 PRI-J1
I2C#0
TEST
ACT-LED
SEC-J4 SEC-J3
SEC-J2 SEC-J1
SEC-SDB
SECONDARY EXPANDER
PRIMARY EXPANDER
BPN-SAS3-826EL1
REV:1.00
SAS CODE
SAS CODE
A1
A2
A7
A8
CG1
B1
B2
B7
B8
C1
C2
C7
C8
D1
D2
D7
D8
CG4
E1
E2
G2
F2
F1
H2
H1
G1
F7
F8
G8
E7
G7
H7
H8
E8
PRESS FIT
CG5CG2
A1
A2
A7
A8
CG1
B1
B2
B7
B8
C1
C2
C7
C8
D1
D2
D7
D8
CG4
E1
E2
G2
F2
F1
H2
H1
G1
F7
F8
G8
E7
G7
H7
H8
E8
PRESS FIT
CG5CG2
A
C
A
C
A C
A
CA C
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
3 2 1
4
3 2 14
1 4
1
4
1
4
1 4
1
4
1
4
1
4
11
1222
A
1
E
5
H
5
1
A E H
A
1
E
5
H
5
1
A
E
H
A1
A2
A7
A8
CG1
CG2
B1
B2
B7
B8
C1
C2
C7
C8
D1
D2
D7
D8
CG3
E1
E2
G2
F2
F1
H2
H1
G1
F7
F8
G8
E7
G7
H7
H8
E8
PRESS FIT
A1
A2
A7
A8
CG1
CG2
B1
B2
B7
B8
C1
C2
C7
C8
D1
D2
D7
D8
CG3
E1
E2
G2
F2
F1
H2
H1
G1
F7
F8
G8
E7
G7
H7
H8
E8
PRESS FIT
1
5 10 15 20 25 26
Y
R
K
E
A
1 5 10 15 20 2526
AF
AE
Y
R
K
E
A
1
2
3
1
2
3
1
DESIGNED IN USA
BAR CODE
6
7
12
13
24
L22
J14
J15
LED29
LED28
LED27
LED26
LED25
L3
L23
C496
C502
C501
C500
C499
C498
C497
C495
C494 C492
C491
C689
C681
J21
J20
U22
J23
J22
J18
J19
JPW2
JPW1
JPW3
U34
U17
U14
U21
U16
U20
U6
C52
J16
J17
MH7
MH6
MH9
MH8
MH5
MH1
MH2
MH3
MH4
U30
U24
U7
U27
JP1
R97
C511
C5
J*
J*
I2C#4
SEC-UART
PRI-UART
12V 5V
HB-LED
HB-LED
PRI-SDB
PRI-J4 PRI-J3
PRI-J2 PRI-J1
I2C#0
TEST
ACT-LED
SEC-J4 SEC-J3
SEC-J2 SEC-J1
SEC-SDB
SECONDARY EXPANDER
PRIMARY EXPANDER
Port A
Expander 1
Port B
Expander 2
Dual Host Bus Adapter
backplane connects to two HBA's.
Figure B-9. Dual HBA
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.
Figure B-10. Dual HBA Failover
SAS HBA
SAS HBA
SAS HBA
SAS HBA
Port A
Expander 1
Port B
Expander 2
Important: For RAID controllers, redundancy is achieved through port failover. For
multiple HBAs MPIO software is required to achieve failover protection.
Failover with RAID Cards and 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,
balancing and failover tasks.
PRI-J1
PRI-J2
PRI-J3
PRI-J4
SEC-J1
SEC-J2
SEC-J3
SEC-J4
PRI-J1
PRI-J2
PRI-J3
PRI-J4
SEC-J1
SEC-J2
SEC-J3
SEC-J4
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