User`s manual

C-6
SC825M Chassis Manual
Backplane Front LED
SAS 818S Front LED
Jumper Description
D4 (Front)
Overheat/Drive Failure LED Indicator
(Red light: flashing, Buzzer: On)
I
2
C and SGPIO Modes and Jumper Settings
This backplane can utilize I
2
C or SGPIO. I
2
C is the default mode and can be used
without making changes to your jumpers. The following information details which
jumpers must be configured to use SGPIO mode or restore your backplane to I
2
C
mode.
I
2
C Mode (Default)
Jumper Jumper Setting Note
JP33 2-3 Controller ID #1
JP34
1-2: ID#0
2-3: ID#1
Backplane ID #1
JP40 Open I
2
C Reset _SDOUT#1
JP42 2-3 I
2
C Backplane ID _SDIN#1
JP50 Closed I
2
C Reset #1
SGPIO Mode Only
Jumper Jumper Setting Note
JP33 1-2 Controller ID #1
JP34
1-2: ID#0
2-3: ID#1
Backplane ID #1
JP40 Closed I
2
C Reset _SDOUT#1
JP42 1-2 I
2
C Backplane ID _SDIN#1
JP50 Open I
2
C Reset #1