IBM DCS9550 1S1 manual SCM I/O Module Configurations, Internal Loop Structures, FC-AL Interface

Installation

Figure 2–4Installing an AC Power Supply Cooling Module (2)

2.4SCM I/O Module Configurations

Important Please refer to section 2.9 for information on SATA drive configurations.

2.4.1Internal Loop Structures

The DCS9550 1S1 Storage Expansion Unit is configured with one internal loop of 16 drives.

2.5FC-AL Interface

The SCM (I/O) interface module provides an external FC-AL interface via SFP connection.The SCM module facilitates the emulation of fibre channel drives by ATA/SATA drives by converting FC protocols to ATA/SATA protocols. This is done through protocol conversion on the SCM module, which directly connects to each drive using the serial ATA protocol and then presents to the host via one FC loop hubbed to two or four SFP connections, depending on configuration.

Note There are no external terminators required with Fibre Channel architecture and any drive may be hot plugged during operation.

20 IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide