Using the AMCC 3ware® I2C Multiplexer with a Supermicro® Backplane
2
AMCC 3ware I
2
C MUX Documentation
Mounting the I
2
C MUX
You can mount the I
2
C MUX in an empty slot or any available space in
the chassis.
The I
2
C MUX has two break-away sections that can be removed to
make the I
2
C MUX card smaller. They can also be used as mounting
points for one or two Battery Backup Unit (BBU) batteries, to
maximize space usage inside the enclosure.
You may wish to install the backplane and controller in their respective
enclosures before connecting them via cables.
Connecting to Power
Power is supplied to the I
2
C MUX via a standard 4-pin Molex power
connector.
Cable Connections
In order for LEDs to be associated with the correct drives, the cable
connections between the I
2
C MUX, 3ware RAID controller, and
Supermicro backplane need to map to their corresponding port number
or port number groups.
Example:
The drive cable that connects to port 1 on the 9650SE RAID
controller must connect to the port 1 SATA connector on the
Supermicro backplane. In addition, the I
2
C MUX port 0-7 (J4)
connector cable must use one of its two cable ends to connect to
Sideband connector #1 on the backplane, which manages I
2
C services
for backplane SATA ports 0-3.
The illustrations on pages 3 through 5 show the cable connection
patterns between the I
2
C MUX and each of the three different
Supermicro backplanes.
The 826TQ and 836TQ backplanes illustrations show a 9650SE-16ML
RAID controller and the 846TQ illustration shows a 9650SE-24M8
RAID controller.
Cable Pin Definitions
Tables showing the proper cable pin definitions are in the Appendix on
page 7.
Jumper Settings
By default, Supermicro SAS Backplanes are set to use I
2
C to manage
enclosure services.
Therefore, the default jumper settings on the
backplanes should not normally need to be adjusted. However, if
the default settings have been changed for any reason, you will
need to change them to the I
2
C jumper settings.
It is a good idea to review the jumper settings and make sure they are
correct. Tables showing the proper jumper settings for each backplane
are provided in the Appendix on page 6.
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