AMCC 9550SX-8LP manual Whether to Use the LED Status Connector

Before You Begin

„While the 3ware 9550SX RAID controller can be installed in both 64-bit PCI and PCI-X slots, not all slots give equal performance.

The 3ware 9550SX controller performs best when installed in a PCI-X 133MHz 64-bit slot. However, it can also operate at 66MHz or 100MHz.

Whether to Use the LED Status Connector

3ware RAID controllers include two types of LED status connectors:

„Overall indicator, which lights when any drive is active.

„Individual LED indicators, for each drive. (Not supported on chassis that have a common ground.)

If you are building a system from scratch, you may want to consider using a chassis or drive carrier that is compatible with the 3ware RAID controller activity LEDs, such as the AMCC RDC-400- SATA drive carrier, available through AMCC. Please check the 3ware web site (www.3ware.com) for chassis and drive carrier compatibility list.

For more information, see “Connecting Drive Activity LED Indicators” on page 17.

Most chassis have a single drive activity cable that you can connect to the overall activity indicator on the 3ware 9550SX controller. For the location of the overall drive activity connector, see the figure for the appropriate controller in the installation sections starting on page 18, and refer to Table 1, “LED Indicator Pin Positions,” on page 20.

Note: If you are using a chassis that includes a Chassis Control Unit (CCU), follow the instructions that came

with the chassis to connect the I2C cable from the CCU to the I2C connector on the 9550SX.

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