Exhibit 21.1

**SUBSIDIARIES OF REGISTRANT**

| **NAME**                                                 |   | **PLACE OF   INCORPORATION OR   ORGANIZATION** |
|----------------------------------------------------------|--------|------------------------------------------------|
|                                                          |   |                                                |
| C-Cube   International Limited (Hong Kong)               |   | Hong Kong                                      |
| C-Cube   Microsystems (Asia Pacific) Limited (Hong Kong) |   | Hong Kong                                      |
| C-Cube   Microsystems (Canada) Limited                   |   | Canada                                         |
| C-Cube   Microsystems International Ltd                  |   | Bermuda                                        |
| C-Cube   Technology Ltd.                                 |   | Bermuda                                        |
| C-Cube U.S.                                              |   | Delaware                                       |
| LSI Logic   LLC                                          |   | Delaware                                       |
| LSI Logic   Manufacturing Services, Inc.                 |   | Delaware                                       |
| LSI Logic   A.B.                                         |   | Sweden                                         |
| LSI Logic   Asia, Inc.                                   |   | Delaware                                       |
| LSI Logic   Canada Corporation                           |   | Canada                                         |
| LSI Logic   Corporation of Canada, Inc.                  |   | Canada                                         |
| LSI Logic   Corporation of Korea, Inc.                   |   | Korea                                          |
| LSI Logic   Export Sales Corporation                     |   | U.S. Virgin   Islands                          |
| LSI Logic   Europe Limited                               |   | UK                                             |
| LSI Logic   GmbH                                         |   | Germany                                        |
| LSI Logic HK   Holdings                                  |   | Cayman                                         |
| LSI Logic   Malta Ltd.                                   |   | Maltese                                        |
| LSI Logic   Hungary LLC                                  |   | Hungary                                        |
| Francionial   Resources Ltd.                             |   | B.V.I.                                         |
| LSI Logic   Hong Kong Ltd.                               |   | Hong Kong                                      |
| LSI Logic   International Services, Inc.                 |   | California                                     |
| LSI Logic   Japan Semiconductor, Inc.                    |   | Japan                                          |
| LSI Logic KK                                             |   | Japan                                          |
| LSI Logic   Netherlands B.V.                             |   | Netherlands                                    |
| LSI Logic   Resale Corporation                           |   | Delaware                                       |
| LSI Logic   S.A.                                         |   | France                                         |
| LSI Logic   Singapore Ltd.                               |   | Singapore                                      |
| LSI Logic   S.P.A.                                       |   | Italy                                          |
| LSI Logic   Storage Systems, Inc.                        |   | Delaware                                       |
| LSI Logic   Storage Europe Holdings Ltd.                 |   | Ireland                                        |
| LSI Logic   Storage Systems Europe Ltd.                  |   | Ireland                                        |
| LSI Logic   Storage Systems International Services, Inc. |   | Delaware                                       |
| Media   Computer Technologies, Inc.                      |   | California                                     |