## About SRC Sets

Data hosts connect to the storage resource card (SRC) sets, through the Fibre Channel (FC) ports on the service panel. The SRC set consists of two cards: the SRC processor card and the storage I/O (SIO) card. SRC sets are always configured as pairs, so each system has at least two SRC processor cards and two SIO cards.

Each SRC set has the following characteristics:

- The cards' connectors connect to the back of the Service Processor panel.
- The connection between the two cards is through the chassis midplane. The SRC processor card plugs into the front of the midplane, and the SIO card plugs into the back of the midplane.
- The SIO card provides the FC interface to the storage.
- You can swap either card in the set without affecting the other card.
- Each SRC set provides eight ports. The processors on the card recognize whether a host or storage device is attached to a port. Each SRC set usually has four ports allocated for storage and four ports allocated for data hosts.

Note -

To make optimal use of the processors on the storage resource card sets, use the ports for storage connections in the following order: 8,6,7,5,4,3,2,1.

The number of SRC sets determines the number of initiators that can be connected to the system. Each system can be configured with a minimum of two SRC sets, for 16 FC ports, and a maximum of four SRC sets, for 32 FC ports.

### Related Topics

- About Allocating Ports