3-2

SAS2-826EL Series Backplane User's Guide

The SAS2-826EL2 backplane has two expanders which allow effective failover

and recovery.

3-2 Failover

Single Host Bus Adapter

Ina single host bus conguration,

the backplane connects to one host

bus adapter.

Single Host Bus Adapter Failover

If the expander or data path in Port

A fails, the system will automatically

fail over to Port B.

SAS HBA

Port A

Expander 1

Port B

Expander 2
Q9
F1
FANFAIL1
AC
OVERHEATFAIL1
AC
5V_LED1
A
C
12V_LED1
A
C
ACT18
A
C
ACT17
A
C
+
C367
C366
C365
C353C352
+
C134
+
C133
+
C132
C121
C120
+
C119
+
EC19
R167
2
1
J16
J19
PRI_J1
PRI_J0
SEC_J0
SEC_J1
BC8
BC518
C157
C395
1
FANFAIL_LED_DISABLE
1
BUZZER_ENB1
1
MDIO1
MDIO2
1
ACTLED1
FAN_MONITOR_DISABLE
1
MH9
MH8
MH7
MH6
MH5
MH4
4
1
FAN1
4
FAN2
1
FAN3
1
8
J18
1
8
5
Y
E
20
R
K
1015
AE
2528
AH
5
E
20
R
K
1015
AE
2528
AH
SEC_MODE1
13
1
SEC_MODE2
13
Y2 1
4
EXPDBG1
1
EXPDBG2
1
4
UART_S1 14
UART_P1
PRI_MODE1
PRI_MODE2
PRI_I2C1
Q4
R187
JP1
1
4
+
C408
BCA115
BCA121
C265
C72
R305
+
C128
+
+
C130
+
+
C362
+
EC6
+
+
EC10
+
EC11
EC12
+
EC13
+
EC14
+
+
+
EC18
+
EC7
+
EC8
+
EC9
+5V +12V
GNDGND
PWR1
+5V
+12V
GNDGND
PWR2
+5V
+12V GNDGND
PWR3SAS CODEBAR CODE1.00REV:BPN-SAS2-826EL2MACH FINISH30ANGLESPECIFIED DIMENSIONSUNLESS OTHERWISEXXXXXX.010.03.1TOLERANCESDECIMALARE IN INCHESTeddy/BenDESINGER:DATE:2009.12.15PROJECT NAME:SAN JOSE,CA 95131DESIGNED BY SUPERMICRO U.S.A.www.supermicro.comTEL:408-503-8000 FAX:408-503-8008SILKSCREENPRIMARY-SIDE
S
UPER
R
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
S
UPER
RRRRRRRRRRWWNWWNABAADESIGNED IN USAREV 1.01
BPN-SAS2-826EL2
SAS HBA

Port A

Expander 1

Port B

Expander 2