RS2BL040 sgpio cable

[idata]

I am building a server with Intel components:

Chassis: http://www.elledi.it/shop/product_info.php?manufacturers_id=&products_id=31695579 SC5299BRP

Backplane: http://www.elledi.it/shop/product_info.php?manufacturers_id=&products_id=45914692 AXX6DRV3GEXPCpu: http://www.elledi.it/shop/product_info.php?manufacturers_id=&products_id=54361605 BX80605X3450Motherboard: http://www.elledi.it/shop/product_info.php?manufacturers_id=&products_id=52288447 S3420GPLXRam: ?????????????Raid Controller: http://www.elledi.it/shop/product_info.php?products_id=54262696 RS2BL040

Raid Controller is shipped with a cable.

This cable has 4 SATA connectors and 1 cable labeled < SGPIO >.

Where should i connect this SGPIO cable.

what is its function?

[Edward_Z_Intel]

SGPIO cable is not needed when you use an expander backplane.