Santa Clara-based 3Com Corp. said fiscal fourth-quarter earnings rose 8% to $89.2 million, or 48 cents a share, from $82.5 million, or 46 cents, in the year-earlier period. . . . Santa Clara-based StorMedia Inc. said it expects to report a fiscal second-quarter loss and plans to cut its work force by 11% because of weaker demand for its computer disks.